0001193125-26-221771 | 10-Q | XBRL Viewer | Cardinal Infrastructure Group INC

Unaudited Proforma for the Company and ALGC

Three months ended March 31,

Net income, including noncontrolling interests

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Earnings Per Share - Additional Information (Details)	3 Months Ended
Earnings Per Share - Additional Information (Details)	Mar. 31, 2026 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	27,573,875

Business Combinations - Fair Value of Backlog - Additional Information (Details) - USD ($)		3 Months Ended
	Feb. 18, 2026	Mar. 31, 2026	Mar. 31, 2025
Business Combination [Line Items]
Amortization expense		$ 3,567,348	$ 1,527,500
Amortization expense amortized in 2027		16,955,154
AL Grading Contractors LLC \| Level 3
Business Combination [Line Items]
Increase (decrease) in fair value of backlog asset	$ 2,400,000
Backlog \| AL Grading Contractors LLC
Business Combination [Line Items]
Amortization expense		1,630,696
Backlog \| AL Grading Contractors LLC \| Level 3
Business Combination [Line Items]
Gross backlog amount	$ 18,700,000
Backlog realization period	18 months
Discount rate	17.00%
Increase (decrease) in profit margin assumption	2.00%
Increase (decrease) in fair value of backlog asset	$ 2,700,000
Useful life	18 months
Amortization expense		1,558,333
Amortization expense amortized in 2026		10,908,333
Amortization expense amortized in 2027		$ 6,233,334
Residential Backlog \| AL Grading Contractors LLC \| Level 3
Business Combination [Line Items]
Gross backlog amount	$ 11,300,000
Estimated profit margin	27.10%
Multifamily Backlog \| AL Grading Contractors LLC \| Level 3
Business Combination [Line Items]
Gross backlog amount	$ 3,800,000
Estimated profit margin	29.60%
Commercial Backlog \| AL Grading Contractors LLC \| Level 3
Business Combination [Line Items]
Gross backlog amount	$ 1,800,000
Estimated profit margin	27.40%
Industrial Backlog \| AL Grading Contractors LLC \| Level 3
Business Combination [Line Items]
Gross backlog amount	$ 1,800,000
Estimated profit margin	28.90%

Pay vs Performance Disclosure - USD ($)	3 Months Ended
Pay vs Performance Disclosure - USD ($)	Mar. 31, 2026	Mar. 31, 2025
Pay vs Performance Disclosure
Net Income (Loss)	$ 3,418,438	$ 5,476,981

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net income	$ 11,481,036	$ 6,641,745
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	5,702,410	5,071,341
Amortization of debt issuance costs	130,328	0
Amortization of other intangible assets	3,567,348	1,527,500
(Gain) on disposal of property and equipment	(2,397)	(110,945)
Noncash stock compensation	191,852	0
(Earnings) from investments in unconsolidated affiliates	0	(47,204)
Provision for deferred income taxes	1,031,051	0
Changes in operating assets and liabilities:
Accounts receivable, net	(18,417,868)	3,429,615
Contract assets	(19,716,683)	(1,273,858)
Prepaid expenses	642,344	(201,690)
Other assets	249,389	(1,596,519)
Accounts payable	22,586,565	789,417
Accrued expenses	3,902,484	(517,531)
Contract liabilities	(2,053,018)	(1,619,189)
Other liabilities	22,178	0
Net cash provided by operating activities	9,317,019	12,092,682
Cash flows from investing activities:
Proceeds from the sale of property and equipment	56,214	144,011
Purchases of property and equipment	(9,317,980)	(10,372,126)
Acquisitions, net of cash acquired	(125,532,857)	(13,992,969)
Net cash used in investing activities	(134,794,623)	(24,221,084)
Cash flows from financing activities:
Proceeds from notes payable	80,000,000	21,736,705
Principal payments on notes payable	(2,545,308)	(4,280,528)
Payment of debt issuance costs	(838,501)	0
Principal payments on finance lease obligations	(538,528)	(599,006)
Payments of deferred consideration	(3,766,617)	0
Member distributions	0	(2,865,337)
Net cash provided by financing activities	72,311,046	13,991,834
Net change in cash	(53,166,558)	1,863,432
Cash
Beginning of period	97,149,425	20,917,108
End of period	43,982,867	22,780,540
Supplemental non-cash investing and financing activities:
Purchases of property and equipment acquired through acquisitions	36,382,739	5,080,000
Purchases of property and equipment financed with finance leases	547,954	723,438
Right-of-use assets recognized with operating leases	11,767,913	1,495,491
Unfavorable lease fair value adjustment recognized on acquisition	1,380,000	0
(Decrease) in accrued and unpaid member distributions	0	(67,401)
Increase in deferred acquisition consideration payable	0	937,500
Unrealized cash flow hedge losses	(526,177)	0
Fair value of contingent consideration liabilities - Tax Benefit Agreement and Tax Receivable Agreement	15,254,000	0
Rollover equity issued as consideration for acquisitions	0	2,800,000
Class A Stock
Supplemental non-cash investing and financing activities:
Stock issued as consideration for acquisition	8,489,557	0
Class B Equity and LLC Units
Supplemental non-cash investing and financing activities:
Stock issued as consideration for acquisition	$ 102,809,682	$ 0

Goodwill and Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details)	3 Months Ended
	Mar. 31, 2026 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Beginning balance	$ 23,510,649
Goodwill acquired in current-period business combinations	105,109,288
Ending balance	$ 128,619,937

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-4

+ Details

Changes in Accounting Estimates - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Change in Accounting Estimate [Abstract]
Increase in revenue due to effect of changes in estimates for contracts in progress	$ 4,728,186	$ 821,195

Subsequent Events - Additional Information (Details) - USD ($)		3 Months Ended
	Feb. 18, 2026	Mar. 31, 2026	Mar. 31, 2025	Feb. 28, 2026	Jan. 31, 2026	Dec. 31, 2025
Subsequent Event [Line Items]
Aggregate annual payments		$ 1,193,081	$ 917,626
CCCRE Holdings
Subsequent Event [Line Items]
Expected lease payments		144,000
AL Grading Contractors LLC
Subsequent Event [Line Items]
Cash	$ 115,361,840	117,761,840
Expected lease payments		$ 600,000
Lease agreement, Term	15 years	15 years
Class A Common Stock
Subsequent Event [Line Items]
Common stock, par value per share		$ 0.0001				$ 0.0001
Class B Common Stock
Subsequent Event [Line Items]
Common stock, par value per share		$ 0.0001				$ 0.0001
Maximum \| October 2025 Credit Facility
Subsequent Event [Line Items]
Aggregate principal amount				$ 200,000,000
Minimum \| October 2025 Credit Facility
Subsequent Event [Line Items]
Aggregate principal amount				$ 120,000,000
Interest Rate Swap \| Truist Bank
Subsequent Event [Line Items]
Initial notional amount					$ 60,000,000
Fixed rate					3.80%

Contract Assets and Liabilities, and Provision for Contract Losses - Summary of Contract Assets and Liabilities (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025	Dec. 31, 2024
Contract assets:
Costs and estimated earnings in excess of billings on uncompleted contracts	$ 41,029,017	$ 27,949,597
Conditional retainage	44,209,224	26,944,663
Total contract assets	85,238,241	54,894,260
Contract liabilities:
Billings in excess of costs and estimated earnings on uncompleted contracts	16,733,562	18,792,435
Less: Conditional retainage	(7,085,151)	(8,096,518)
Provision for contract losses	20,961	135,647	$ 4,039,488
Total contract liabilities	9,669,372	10,831,564
Net contract assets (liabilities)	$ 75,568,869	$ 44,062,696

Contract Assets and Liabilities, and Provision for Contract Losses

3 Months Ended

Mar. 31, 2026

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Contract Assets and Liabilities, and Provision for Contract Losses

4. Contract Assets and Liabilities, and Provision for Contract Losses

Contract assets and liabilities consisted of the following amounts as of each period end:


	March 31, 2026			December 31, 2025
Contract assets:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	41,029,017		$	27,949,597
Conditional retainage		44,209,224			26,944,663
Total contract assets	$	85,238,241		$	54,894,260
Contract liabilities:
Billings in excess of costs and estimated earnings on uncompleted contracts	$	16,733,562		$	18,792,435
Less: Conditional retainage		(7,085,151	)		(8,096,518	)
Provision for contract losses		20,961			135,647
Total contract liabilities	$	9,669,372		$	10,831,564
Net contract assets (liabilities)	$	75,568,869		$	44,062,696

Conditional retainage is a type of contract asset, but is reported in the table above and on the condensed consolidated balance sheets within “Contract assets” and “Contract liabilities” on a contract-by-contract basis. The Company's total conditional retainage receivable balance was $51,294,375 at March 31, 2026 and $35,041,181 at December 31, 2025.

Total contract assets increased at March 31, 2026 by $30,343,981 compared to December 31, 2025 due to (1) an increase in unbilled revenue on in-process contracts due to the timing of advance billings and work progression, (2) an increase in conditional retainage from increased billings and the timing of retainage receipts, and (3) an increase of $15,908,607 of acquired contract assets from the ALGC business combination in 2026 (Note 3).

Total contract liabilities decreased at March 31, 2026 by $1,162,192 compared to December 31, 2025 due to a decrease in the timing of advance billings and work progression, and a lower magnitude and fewer anticipated losses on customer contracts within the provision for contract losses. These decreases were partially offset by lower conditional retainage related to advanced billing contracts, as well an increase of $1,162,664 of acquired contract liabilities from the ALGC business combination in 2026 (Note 3).

Revenue recognized during the quarters ended March 31, 2026 and 2025 that were included in the opening balance of billings in excess of costs and estimated earnings (a component of Contract liabilities) was $17,049,269, and $19,826,852, respectively.

At March 31, 2026, the Provision for contract losses included 8 contracts, with individual contract losses ranging from less than $1,000 to $5,000. At March 31, 2025, the Provision for contract losses included 9 contracts, with individual contract losses ranging from $1,000 to $70,000. The following table presents a reconciliation of the beginning and ending balances of the Company's Provision for contract losses:


	March 31, 2026			December 31, 2025
Opening balance January 1 within Contract liabilities	$	135,647		$	4,039,488
Additions - new loss provisions within Cost of revenues		3,683			9,798
Utilization - losses realized within Cost of revenues		(118,369	)		(3,913,639	)
Ending balance within Contract liabilities	$	20,961		$	135,647

Commitments and Contingencies

3 Months Ended

Mar. 31, 2026

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

15. Commitments and Contingencies

The Company is involved in litigation in the normal course of business and does not anticipate that such matters will ultimately have a material effect on its condensed consolidated financial position or the results of its operations.

The Company is required to pay an monthly management fee of $18,773 in connection with equipment, subject to annual adjustments of 2% from January 2026 through June 2028.

The Company has entered into one operating lease agreement with a 15 year term which has not yet commenced. Total commitments under the new agreement through 2041 is approximately $16,910,000. Refer to Note 16 - Related Party Transactions for additional details about this lease.

Business Combinations (Tables) - AL Grading Contractors LLC

3 Months Ended

Mar. 31, 2026

Business Combination [Line Items]

Schedule of Total Purchase Consideration

Total purchase consideration was as follows:


Purchase Consideration
Cash	$	115,361,840
Liabilities assumed and paid at closing		10,358,599
Net working capital adjustment escrow (Initial Payment Escrow)		2,400,000
Rollover equity		102,809,683
Cardinal Group Class A common stock bonus grants		8,489,557
Contingent Consideration - Tax Receivable and Benefit Agreements		15,254,000
Estimated net working capital adjustment payable		(8,000	)
Total consideration	$	254,665,679

Schedule of Purchase Price Allocation

The ALGC purchase price allocation is as follows:


Preliminary Purchase Price Allocation
Cash	$	2,587,582
Accounts receivable		16,930,962
Contract assets		10,627,298
Prepaid expenses		436,555
Other assets current		199,097
Other long term assets		426,506
Property, plant and equipment		36,382,739
Operating lease right-of-use assets		4,798,645
Intangible assets:
Customer relationships		67,900,000
Backlog		18,700,000
Non-compete agreements		1,200,000
Trade name		9,300,000
Goodwill		105,109,288
Accounts payable		(11,548,286	)
Accrued expenses		(1,313,235	)
Contract liabilities		(890,826	)
Current portion of operating lease liabilities		(85,148	)
Operating lease liabilities, less current portion		(6,095,498	)
Total net assets acquired	$	254,665,679

Summary of Net Consideration Paid for Acquisitions Presented in Condensed Consolidated Statements of Cash Flows

The following table reconciles the net consideration paid for the acquisition of ALGC to the amounts presented in the condensed consolidated statements of cash flows.


ALGC cash consideration paid	$	117,761,840
ALGC liabilities assumed and paid at closing		10,358,599
Less cash acquired		(2,587,582	)
Cash consideration paid for acquisitions	$	125,532,857

Summary of Unaudited Pro Forma Information

The following unaudited pro forma information presents the combined results of operations of the Company, with ALGC as if the acquisition had occurred on January 1, 2025. The unaudited pro forma results reflect adjustments for (i) depreciation and amortization of acquired tangible and intangible assets based on the preliminary fair value allocations, and (ii) the related income tax effects of these adjustments. The pro forma information is presented for informational purposes only and does not purport to represent what the actual results of operations would have been had the acquisition occurred on the date indicated, nor is it necessarily indicative of future results of operations.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

- Definition

Tabular disclosure of business combination. Includes, but is not limited to, recognized asset and liability.

+ References + Details

Business Combinations - Schedule of Purchase Price Allocation (Details) - USD ($)	Mar. 31, 2026	Feb. 18, 2026	Dec. 31, 2025
Business Combination [Line Items]
Goodwill	$ 128,619,937		$ 23,510,649
AL Grading Contractors LLC
Business Combination [Line Items]
Cash		$ 2,587,582
Accounts receivable		16,930,962
Contract assets		10,627,298
Prepaid expenses		436,555
Other assets current		199,097
Other long term assets		426,506
Property, plant and equipment		36,382,739
Operating lease right-of-use assets		4,798,645
Goodwill		105,109,288
Accounts payable		(11,548,286)
Accrued expenses		(1,313,235)
Contract liabilities		(890,826)
Current portion of operating lease liabilities		(85,148)
Operating lease liabilities, less current portion		(6,095,498)
Total net assets acquired		254,665,679
AL Grading Contractors LLC \| Customer Relationships
Business Combination [Line Items]
Intangible assets		67,900,000
AL Grading Contractors LLC \| Backlog
Business Combination [Line Items]
Intangible assets		18,700,000
AL Grading Contractors LLC \| Non-compete Agreements
Business Combination [Line Items]
Intangible assets		1,200,000
AL Grading Contractors LLC \| Trade Name
Business Combination [Line Items]
Intangible assets		$ 9,300,000

Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill are as follows:


	Three months ended March 31, 2026
Beginning balance	$	23,510,649
Goodwill acquired in current‑period business combinations		105,109,288
Ending balance	$	128,619,937

Schedule of Intangible Assets


		March 31, 2026			December 31, 2025
	Weighted Average Life (Years)	Gross Carrying Amount	Accumulated Amortization	Carrying Value	Gross Carrying Amount	Accumulated Amortization	Carrying Value
Backlog	1.4	$25,971,000	$(8,551,521)	$17,419,479	$7,542,000	$(6,479,500)	$1,062,500
Customer relationships	11.1	82,500,000	(1,752,601)	80,747,399	14,600,000	(523,808)	14,076,192
Trade name	9.5	10,071,000	(357,014)	9,713,986	500,000	(125,000)	375,000
Non-compete agreements	4.0	1,200,000	(34,521)	1,165,479	—	—	—
Total	9.1	$119,742,000	$(10,695,657)	$109,046,343	$22,642,000	$(7,128,308)	$15,513,692

In the three months ended March 31, 2026 and 2025 amortization expense was $3,567,348 and $1,527,500, respectively.

Schedule of Estimated Aggregate Amortization Expense

The estimated aggregate amortization expense for each of the next five years is as follows:


2026	$	16,955,154
2027		17,155,685
2028		9,240,205
2029		9,240,205
2030		8,980,685
Thereafter		47,474,409
Total	$	109,046,343

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

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-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

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-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

+ Details

Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Details)	Mar. 31, 2026
Office Equipment and Computers \| Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	3 years
Office Equipment and Computers \| Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	5 years
Vehicles and Trailers
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	5 years
Machinery and Equipment \| Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	5 years
Machinery and Equipment \| Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	7 years
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	15 years

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share of Common Stock

Basic and diluted earnings per share of common stock have been computed as follows:


	Three months ended March 31, 2026
Numerator:
Net income attributable to Cardinal Infrastructure Group Inc., Basic and Diluted	$	3,418,438

Denominator:
Weighted average shares of common stock outstanding, Basic		15,104,788
Dilutive effects of:
Unvested RSUs		21,891
Weighted average shares of common stock outstanding, Diluted		15,126,679

Basic earnings per share	$	0.23
Diluted earnings per share	$	0.23

Equity and Noncontrolling Interest (Tables)

3 Months Ended

Mar. 31, 2026

Stockholders' Equity Note [Abstract]

Summary of Ownership of LLC Units of OpCo

The following table summarizes the ownership of LLC units of OpCo as of March 31, 2026 and December 31, 2025:


	March 31, 2026					December 31, 2025
	LLC Units		Ownership %			LLC Units		Ownership %
Cardinal Infrastructure Group Inc.		15,292,984		35.68	%		14,947,318		39.00	%
Continuing Equity Holders		27,573,875		64.32	%		23,387,813		61.00	%
Total		42,866,859		100.00	%		38,335,131		100.00	%

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2026
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Property and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2026

Property, Plant and Equipment [Abstract]

Summary of Property and Equipment, Net

Property and equipment, net consisted of the following:


	March 31, 2026			December 31, 2025
Office equipment and computers	$	2,008,894		$	1,760,490
Vehicles and trailers		36,319,490			30,252,251
Machinery and equipment		156,250,241			118,867,241
Leasehold improvements		1,230,007			1,041,123
Construction in progress		10,459,146			8,018,256
Total property and equipment		206,267,778			159,939,361
Accumulated depreciation		(80,725,787	)		(75,037,759	)
Total Property and equipment, net	$	125,541,991		$	84,901,602

Business Combinations - Additional Information (Details) - USD ($)					1 Months Ended	3 Months Ended
	Feb. 18, 2026	Oct. 01, 2025	May 30, 2025	Jan. 03, 2025	Mar. 31, 2026	Mar. 31, 2026	Mar. 31, 2025
Business Combination [Line Items]
Amortization expense						$ 3,567,348	$ 1,527,500
Purcell
Business Combination [Line Items]
Acquisition date				Jan. 03, 2025
Page & Associates, Inc.
Business Combination [Line Items]
Acquisition date			May 30, 2025
Red Clay Industries, Inc.
Business Combination [Line Items]
Acquisition date		Oct. 01, 2025
AL Grading Contractors LLC
Business Combination [Line Items]
Acquisition date	Feb. 18, 2026
Description of acquiree						On February 18, 2026 (the "Acquisition Date"), Cardinal acquired 100% of the membership interests of A.L. Grading Contractors, LLC, a Georgia limited liability company ("ALGC"), pursuant to a Membership Interests Purchase and Contribution Agreement (the "MIPA") among the the Company, Cardinal ("Purchaser"), Diamond Interests Group LLC ("Seller"), and the Anthony L. Wood, Jr. (“Anthony Wood”) and Benjamin A. Wood (“Benjamin Wood” and, together with Anthony Wood, the “Seller Owners”).
Percentage of acquired membership interests	100.00%
Receivables, Contractual cash flows not expected to be collected	$ 0
Lease agreement, Term	15 years				15 years	15 years
Unfavorable fair value adjustment, Reduction to operating lease right of use asset	$ 1,380,000
Revenue					$ 17,136,319	$ 200,073,121	98,564,463
Net income attributable to ALGC					$ 1,237,070	4,349,176	$ 5,401,361
AL Grading Contractors LLC \| Backlog
Business Combination [Line Items]
Amortization expense						$ 1,630,696

Business Combinations - Fair Value of ALGC Intangible Assets - Additional Information (Details) - AL Grading Contractors LLC	Feb. 18, 2026 USD ($) Trial Period shares
Tax Receivable Agreement
Business Combination [Line Items]
Limited liability company units, issued \| shares	4,186,062
Net operating loss carryforward mechanics capped at percentage of pretax income	80.00%
Interest on unpaid payments accrued rate	1.00%
Aggregate acquisition-date fair value	$ 15,300,000
Minimum potential payment	0
Tax Receivable Agreement \| Monte Carlo Simulation Model
Business Combination [Line Items]
Aggregate acquisition-date fair value	$ 8,200,000
Tax Receivable Agreement \| OpCo
Business Combination [Line Items]
Limited liability company units, issued \| shares	4,186,062
Percentage of net cash tax savings	85.00%
Tax Benefit Agreement
Business Combination [Line Items]
Tax amortization period	15 years
Interest on unpaid payments accrued rate	1.00%
Minimum potential payment	$ 0
Tax Benefit Agreement \| Monte Carlo Simulation Model
Business Combination [Line Items]
Aggregate acquisition-date fair value	$ 7,100,000
Tax Benefit Agreement \| PubCo
Business Combination [Line Items]
Percentage of cumulative net realized tax benefit	85.00%
Allocated percentage of amortization and depreciation deductions in respect of Basis Adjustments	80.00%
Tax Receivable Agreement and Tax Benefit Agreement
Business Combination [Line Items]
Tax amortization period	15 years
Net operating loss carryforward mechanics capped at percentage of pretax income	80.00%
Percentage of cumulative net realized tax benefit	85.00%
Long-term growth rate	3.00%
Equity volatility assumption rate	58.00%
Average equity volatility period	20 years
Cost of equity capital percentage	24.00%
Increase in discount rate	2.00%
Decrease in discount rate	2.00%
Decrease in value due to change in discount rate	$ (790,000)
Increase in value due to change in discount rate	$ 780,000
Increase in volatility variable	5.00%
Decrease in volatility variable	5.00%
Decrease in value due to change in volatility variable	$ (960,000)
Increase in value due to change in volatility variable	$ 900,000
Expected payment period \| Period	2,041
Tax Receivable Agreement and Tax Benefit Agreement \| Monte Carlo Simulation Model
Business Combination [Line Items]
Aggregate acquisition-date fair value	$ 15,300,000
Number of trials \| Trial	100,000
Level 3 \| Customer Relationships
Business Combination [Line Items]
Tax amortization period	15 years
Fair value	$ 67,900,000
Decrease or increase in customer attrition rate	2.00%
Increase or decrease in fair value of customer relationship due to customer attrition	$ 9,300,000
Decrease or increase in discount rate	1.00%
Increase or decrease in fair value of customer relationship due to changes in discount rate	$ 4,600,000
Useful life	11 years 7 months 6 days
Level 3 \| Commercial Customer Relationships
Business Combination [Line Items]
Percentage of attrition rate	16.50%
Discount rate percentage	19.00%
Useful life	9 years
Level 3 \| Industrial Customer Relationships
Business Combination [Line Items]
Percentage of attrition rate	20.50%
Discount rate percentage	19.00%
Useful life	8 years
Level 3 \| Residential Customer Relationships
Business Combination [Line Items]
Percentage of attrition rate	8.50%
Discount rate percentage	19.00%
Useful life	13 years
Level 3 \| Backlog
Business Combination [Line Items]
Useful life	18 months
Level 3 \| Tradename
Business Combination [Line Items]
Discount rate percentage	18.00%
Tax amortization period	15 years
Fair value	$ 9,300,000
Decrease or increase in discount rate	1.00%
Pre-tax royalty rate	1.00%
Useful life	10 years
Decrease or increase in royalty rate	0.10%
Decrease in fair value of trade name due to royalty rate	$ (900,000)
Increase in fair value of trade name due to royalty rate	1,000,000
Increase in fair value of trade name due to changes in discount rate	400,000
Decrease in fair value of trade name due to changes in discount rate	$ (300,000)
Level 3 \| Non-compete Agreements
Business Combination [Line Items]
Useful life	4 years

Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2026

Accounting Policies [Abstract]

Summary of Depreciation Computed by Using Estimated Useful Lives

The fixed assets will be depreciated over their estimated remaining useful lives as follows:


Asset Group		Useful Lives
Office equipment and computers		3-5 years
Vehicles and trailers		5 years
Machinery and equipment		5-7 years
Leasehold improvements		15 years

Leases - Schedule of Other Required Information Related to Company's Lease Obligations (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$ (538,528)	$ (599,006)
Operating cash flows from operating leases	(1,193,081)	(917,626)
Assets obtained in exchange for lease obligations (non-cash)
Property and equipment via finance leases	695,897	723,438
Right-of-use assets via operating leases	$ 11,767,913	$ 1,495,491

Goodwill and Intangible Assets - Schedule of Estimated Aggregate Amortization Expense (Details)	Mar. 31, 2026 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2026	$ 16,955,154
2027	17,155,685
2028	9,240,205
2029	9,240,205
2030	8,980,685
Thereafter	47,474,409
Total	$ 109,046,343

Earnings Per Share

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Earnings Per Share

14. Earnings Per Share

Basic earnings per share is computed by dividing net income attributable to Cardinal Infrastructure Group Inc. by the weighted-average number of shares of Class A common stock outstanding during the period. Diluted earnings per share is computed by adjusting the net income available to Cardinal Infrastructure Group Inc. and the weighted average shares outstanding to give effect to potentially dilutive securities. Shares of Class B common stock are not entitled to receive any distributions or dividends and are therefore excluded from this presentation since they are not participating securities.

As a result of the acquisition, all continuing equity holders were exchanged for Class B non-participating securities. All earnings prior to December 10, 2025, the date of the IPO, were entirely allocable to the non-controlling interests and LLC owners, as a result, earnings per share information is not applicable for reporting periods prior to this date. Consequently, only earnings per share for net income for periods subsequent to December 9, 2025 are presented.

Basic and diluted earnings per share of common stock have been computed as follows:


	Three months ended March 31, 2026
Numerator:
Net income attributable to Cardinal Infrastructure Group Inc., Basic and Diluted	$	3,418,438

Denominator:
Weighted average shares of common stock outstanding, Basic		15,104,788
Dilutive effects of:
Unvested RSUs		21,891
Weighted average shares of common stock outstanding, Diluted		15,126,679

Basic earnings per share	$	0.23
Diluted earnings per share	$	0.23

The dilutive impact of 27,573,875 LLC interests that are exchangeable for Class A common stock is not included in the calculation of diluted earnings per share as the effect would be anti-dilutive.

Significant Accounting Policies - Additional Information (Details)

3 Months Ended

Mar. 31, 2026

USD ($)

Segment

$ / shares

Mar. 31, 2025

USD ($)

Dec. 31, 2025

USD ($)

Jan. 01, 2025

USD ($)

Dec. 31, 2024

USD ($)

Significant Accounting Policies [Line Items]

Allowance for loss contracts

$ 20,961

$ 135,647

$ 4,039,488

Federal deposit insurance corporation insures

250,000

Allowance for estimated expected credit losses

Deferred income taxes

$ 1,031,051

$ 0

Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]

srt:ChiefExecutiveOfficerMember

Number of reportable segments | Segment

Segment reporting, CODM, profit (loss) measure, how used, description

The CODM also uses net income and related profit margins in competitive analysis by benchmarking to the Company’s competitors. The competitive analysis along with the monitoring of budgeted versus actual results are used in assessing performance of the Company and in establishing management’s compensation.

Accounts receivable, net

$ 96,631,099

$ 61,282,268

$ 38,304,817

Decrease in depreciation expense

5,702,410

5,071,341

Increase in income before income taxes

12,534,265

6,641,745

Net income

$ 11,481,036

$ 6,641,745

Earnings per diluted share | $ / shares

^[1]

$ 0.23

Intangible Assets, Amortization Period

Significant Accounting Policies [Line Items]

Decrease in depreciation expense

$ (581,223)

Increase in income before income taxes

581,223

Net income

$ 459,166

Earnings per diluted share | $ / shares

$ 0.03

Change in accounting estimate, description

Company changed its accounting method for property and equipment from the accelerated basis of depreciation to the straight-line method of depreciation, effective as of January 1, 2026. The Company believes the change from the accelerated method to the straight-line method of depreciation is preferable under U.S. GAAP as it will result in an estimate of depreciation expense which more accurately reflects the pattern of usage and the expected benefits of such assets.

Director | RSUs

Significant Accounting Policies [Line Items]

Vesting terms

Company granted RSUs to members of its Board of Directors as part of annual director compensation, with vesting terms that vary by award. In connection with the IPO, non-employee directors received two grants in lieu of a pro-rated annual cash retainer: one that vested on December 31, 2025, and one that vests on December 31, 2026. In addition, RSUs granted in lieu of the 2026 annual cash retainers vest in equal quarterly installments through December 31, 2026. These awards are accounted for under ASC 718 using the same grant‑date fair value measurement and recognition principles as employee awards.

Customer Concentration Risk | Revenue | Customer A

Significant Accounting Policies [Line Items]

Total revenue percentage

13.00%

11.00%

Minimum

Significant Accounting Policies [Line Items]

Allowance for loss contracts

$ 1,000

Maximum

Significant Accounting Policies [Line Items]

Allowance for loss contracts

$ 5,000

$ 70,000

[1]	(1) Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period following the recapitalization transactions and IPO (see Note 14)

Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment	$ 0	$ 0
Amortization expense	$ 3,567,348	$ 1,527,500

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Topic 230
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
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Reference 5: http://www.xbrl.org/2003/role/exampleRef
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Reference 6: http://www.xbrl.org/2003/role/exampleRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 6
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-6

+ Details

- Definition

Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References + Details

Contract Assets and Liabilities, and Provision for Contract Losses - Summary of Reconciliation of Provision for Contract Losses (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Opening balance January 1 within Contract liabilities	$ 135,647	$ 4,039,488
Additions - new loss provisions within Cost of revenues	3,683	9,798
Utilization - losses realized within Cost of revenues	(118,369)	(3,913,639)
Ending balance within Contract liabilities	$ 20,961	$ 135,647

Notes Payable & Credit Facility

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Notes Payable & Credit Facility

7. Notes Payable & Credit Facility

Notes payable consisted of the following at March 31, 2026 and December 31, 2025, respectively:


	March 31, 2026		December 31, 2025
Note payable under the October 2025 Credit Facility, bearing interest based on the Secured Overnight Financing Rate (“SOFR”) plus 2.375%, with interest payable monthly and scheduled quarterly principal amortization, maturing October 31, 2030. In February 2026, the Company entered into the First Amendment to the Credit Agreement, which provided for an additional term loan advance of $80.0 million, increasing the aggregate outstanding principal balance from $120.0 million to $200.0 million. Quarterly principal installments of $2.5 million are due through September 30, 2027, $3.75 million from December 31, 2027 through September 30, 2030, with the remaining principal due as a final balloon payment on October 31, 2030. The effective interest rate, inclusive of the amortization of deferred financing costs, was 6.57% at March 31, 2026.	$	197,500,000	$	120,000,000
Unsecured subordinated notes payable to various sellers. Notes payable are due in (a) quarterly installments of $125,000 plus interest at 7% through September 2025, with $0 outstanding as of September 30, 2025 and (b) semi-annual payments of $25,422 including interest at 5% through July 2027 unless seller’s employment agreement is terminated without cause in which all principal and interest would be payable immediately. The effective interest rate was 5.00% at March 31, 2026		68,726		91,378
Note payable to a financial institution, bearing interest based on Compounded SOFR, calculated daily, with interest payable monthly and scheduled monthly principal amortization, maturing January 1, 2031. Monthly principal installments of $7,552 are due through December 1, 2030, with the remaining principal balance of $641,927 due as a final balloon payment on January 1, 2031. The effective interest rate was 6.20% at March 31, 2026.		1,064,844		1,087,500
Total Notes Payable		198,633,570		121,178,878
Less Current Portion		10,129,136		6,128,674
Less Unamortized Debt Issuance Costs		2,605,513		1,897,340
Long-Term Portion	$	185,898,921	$	113,152,864

Future maturities of notes payable are as follows as of March 31, 2026:


2026	$	7,583,163
2027		11,386,605
2028		15,090,625
2029		15,090,625
2030		148,840,625
Thereafter		641,927
	$	198,633,570

October 2025 Credit Facility

On October 1, 2025, Cardinal NC, Cardinal and certain wholly owned subsidiaries entered into a credit facility (the "October 2025 Credit Facility") with Truist Bank, as administrative agent and lender, which provides for a $75.0 million senior secured revolving credit facility, including a $10.0 million letter of credit sub-facility and a $10.0 million swingline sub-facility, and a $120.0 million senior secured term loan facility. The October 2025 Credit Facility matures on October 1, 2030 and is secured by substantially all assets of the Company and subsidiary guarantors. Borrowings bear interest, at the borrower's option, at either the base rate, SOFR Index, or Term SOFR, plus an applicable margin ranging from 0.875% to 1.625% per annum for base rate borrowings and 1.875% to 2.625% per annum for SOFR-based borrowings, in each case based on the Company's leverage ratio. Amounts under the term loan facility amortize quarterly, commencing March 31, 2026, in aggregate annual amounts equal to 5.0% of the original principal during the first two years and 7.5% during years three through five, with the remaining balance due at maturity. The October 2025 Credit Facility contains certain financial covenants and other customary

affirmative and negative covenants. As of March 31, 2026 and December 31, 2025, outstanding borrowings under the term loan facility and revolving credit facility totaled $197.5 million and $120 million, respectively. As of March 31, 2026, the effective interest rate on outstanding borrowings was 6.57%. As of March 31, 2026, the Company was in compliance with all covenants under the October 2025 Credit Facility.

February 2026 Credit Facility Amendment

On February 18, 2026, Cardinal and other guarantors party thereto entered into an amendment to the October 2025 Credit Facility (the "First Amendment") with Truist Bank, as administrative agent and lender. Under the First Amendment, the lenders provided an additional $80.0 million in term loans on the amendment effective date. The additional borrowing was made to fund the acquisition of ALGC and bears interest under the same terms under the October 2025 Credit Facility. The additional advance was not provided as an incremental facility under the October 2025 Credit Facility and does not reduce the facility's remaining incremental capacity. Covenants applicable to the First Amendment are the same as those applicable to the base October 2025 Credit Facility.

October 2024 Credit Facility

On October 18, 2024, Cardinal NC and certain wholly owned subsidiaries entered into a senior secured credit facility (the "October 2024 Credit Facility") with Truist Bank and Truist Equipment Finance Corp. as lenders, which consisted of a term loan facility in the aggregate principal amount of approximately $1.5 million, a revolving credit facility providing up to $10.0 million in borrowing capacity, and a master equipment security agreement evidenced by promissory notes in an initial aggregate principal amount of approximately $45.9 million. The October 2024 Credit Facility was secured by substantially all assets of the Company and subsidiary guarantors, subject to certain permitted liens and interests of other parties. Borrowings under the October 2024 Credit Facility bore interest at an Adjusted Term SOFR Rate, and the facility contained certain financial covenants and other customary affirmative and negative covenants. As of December 31, 2024, outstanding borrowings under the term loan facility totaled approximately $1.5 million, outstanding borrowings under the equipment facility totaled approximately $45.9 million, and there was no outstanding balance on the revolving credit facility. As of December 31, 2024, the Company was in compliance with all covenants under the October 2024 Credit Facility. In January 2025, the Company amended the October 2024 Credit Facility to increase borrowing capacity by $27.0 million for future purchases of equipment, trucks and trailers, and to provide additional borrowing capacity of up to $6.0 million for construction of an asphalt plant. As of September 30, 2025, outstanding borrowings under the October 2024 Credit Facility totaled approximately $80.6 million. All amounts outstanding under the October 2024 Credit Facility, totaling approximately $81.1 million as of October 1, 2025, were repaid with proceeds from the October 2025 Credit Facility, and the October 2024 Credit Facility was terminated.

Other 2025 Financing Activity

In January 2025, the Company entered into a $7.2 million debt agreement with a financial institution in connection with the acquisition of Purcell. The note payable was secured by real property and was payable in monthly principal installments over five years with interest payable monthly based on SOFR plus 2.35%. This debt was subsequently repaid with proceeds from the October 2025 Credit Facility.

In December 2025, the Company entered into a $1,087,500 Note payable to finance equipment. Interest is based on compounded SOFR, calculated daily, with interest payable monthly and scheduled monthly principal amortization, maturing January 1, 2031. Monthly principal installments of $7,552 are due through December 1, 2030, with the remaining principal balance of $641,927 due as a final balloon payment on January 1, 2031.

Total interest incurred during the three months ended March 31, 2026, and 2025, was $2,875,518 and $1,088,446 respectively. Substantially all of the carrying value of assets of the Company are pledged as collateral at March 31, 2026 and December 31, 2025, respectively.

Interest Rate Swap and Risk Management Objectives

The Company is exposed to interest rate risk on its variable-rate borrowings. To manage this exposure, in January 2026, the Company entered into a pay-fixed, receive-floating interest rate swap with an initial notional amount of $60 million, reducing each quarter in proportion to 50% of the October 2025 Credit Facility. The Company has designated this instrument as a cash flow hedge of the variability in interest payments on Term SOFR debt. Under the swap, the Company pays a fixed rate of 3.80% and receives one-month Term SOFR. The swap matures on October, 2030. At inception and quarterly thereafter, the Company assesses, both prospectively and retrospectively whether the derivative is highly effective in offsetting changes in the cash flows of the hedged item. Changes in the fair value of the swap are recorded in accumulated other comprehensive income (loss) ("AOCI") and reclassified into interest expense in the same period the hedged interest payments affect earnings.

As of March 2026, the Company had recorded a liability of $554,159 as a component of other non-current liabilities representing the fair value of $59,250,000 notional for a single instrument of SOFR pay-fixed, receive-floating interest rate swap. The fair value of the swap is determined using a discounted cash flow model based on observable market inputs, including the SOFR forward curve, and is classified as Level 2 within the fair value hierarchy.

For the three months ended March 31, 2026, the Company recognized unrealized losses of $526,177 net of taxes, in OCI. Amounts reclassified from AOCI to increase interest expense was $17,813 for the same periods. The Company estimates that approximately $92,955 of net losses currently in AOCI will be reclassified into earnings over the next twelve months.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Name Accounting Standards Codification
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-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Subparagraph (b)
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 6
-Subparagraph (a)
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-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Business Combinations - Summary of Net Consideration Paid for Acquisitions Presented in Condensed Consolidated Statements of Cash Flows (Details) - AL Grading Contractors LLC - USD ($)		3 Months Ended
	Feb. 18, 2026	Mar. 31, 2026
Business Combination [Line Items]
ALGC cash consideration paid	$ 115,361,840	$ 117,761,840
ALGC liabilities assumed and paid at closing	$ 10,358,599	10,358,599
Less cash acquired		(2,587,582)
Cash consideration paid for acquisitions		$ 125,532,857

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Leases - Summary of Equipment Held Under Finance Leases (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Leases [Abstract]
Equipment	$ 16,360,122	$ 15,919,545
Accumulated depreciation	(10,218,141)	(9,975,175)
Total	$ 6,141,981	$ 5,944,370

Property and Equipment, Net - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 5,702,410	$ 5,071,341
Gain on sale of property and equipment	2,397	110,945
Construction in Progress
Property, Plant and Equipment [Line Items]
Capitalized interest	$ 140,844	$ 0

Notes Payable & Credit Facility - Additional Information (Details) - USD ($)					1 Months Ended			3 Months Ended		12 Months Ended
	Oct. 01, 2025	Sep. 30, 2025	Dec. 31, 2024	Oct. 18, 2024	Jan. 31, 2026	Dec. 31, 2025	Jan. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Feb. 28, 2026	Feb. 18, 2026
Debt Instrument [Line Items]
Note payable to finance equipment						$ 121,178,878		$ 198,633,570		$ 121,178,878
Other non-current liabilities						0		554,159		0
Unrealized cash flow hedge loss								(526,177)
Realized cash flow hedge losses reclassified to net income								17,813
Realized cash flow hedge losses reclassified to net income in next twelve months								92,955
Truist Bank \| Interest Rate Swap
Debt Instrument [Line Items]
Initial notional amount					$ 60,000,000
Percentage of quarterly reduction					50.00%
Fixed rate					3.80%
Maturity date					Oct. 31, 2030
Derivative liability								$ 554,159
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]								Other non-current liabilities
Truist Bank \| Level 2 \| Interest Rate Swap
Debt Instrument [Line Items]
Derivative liability, notional amount								$ 59,250,000
October 2025 Credit Facility
Debt Instrument [Line Items]
Line of credit facility, initiation date	Oct. 01, 2025
Line of credit facility, expiration date								Oct. 01, 2030
Line of credit facility, frequency of payments								quarterly
Line of credit facility, date of first required payment	Mar. 31, 2026
Line of credit facility, frequency of payment and payment terms								Amounts under the term loan facility amortize quarterly, commencing March 31, 2026, in aggregate annual amounts equal to 5.0% of the original principal during the first two years and 7.5% during years three through five, with the remaining balance due at maturity.
Effective interest rate								6.57%
Line of credit facility, covenant compliance								As of March 31, 2026, the Company was in compliance with all covenants under the October 2025 Credit Facility.
Term loan advance												$ 80,000,000	$ 80,000,000
Note payable to finance equipment						120,000,000		$ 197,500,000		120,000,000
Maturity date								Oct. 31, 2030
October 2025 Credit Facility \| First Two Years
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed	5.00%
October 2025 Credit Facility \| Three Through Five Years
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed	7.50%
October 2025 Credit Facility \| Minimum
Debt Instrument [Line Items]
Debt instrument, face amount												120,000,000
October 2025 Credit Facility \| Maximum
Debt Instrument [Line Items]
Debt instrument, face amount												$ 200,000,000
October 2025 Credit Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Interest rate	0.875%
October 2025 Credit Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Interest rate	1.625%
October 2025 Credit Facility \| SOFR
Debt Instrument [Line Items]
Interest rate								2.375%
October 2025 Credit Facility \| SOFR \| Minimum
Debt Instrument [Line Items]
Interest rate	1.875%
October 2025 Credit Facility \| SOFR \| Maximum
Debt Instrument [Line Items]
Interest rate	2.625%
October 2025 Credit Facility \| Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility	$ 75,000,000
Outstanding borrowings										120,000,000
October 2025 Credit Facility \| Letter of Credit Sub-facility
Debt Instrument [Line Items]
Credit facility	10,000,000
October 2025 Credit Facility \| Swingline Sub-facility
Debt Instrument [Line Items]
Credit facility	10,000,000
October 2025 Credit Facility \| Senior Secured Term Loan Facility
Debt Instrument [Line Items]
Credit facility	$ 120,000,000
Outstanding borrowings									$ 197,500,000
October 2025 Credit Facility \| Master Equipment Security Agreement Evidenced by Promissory Notes
Debt Instrument [Line Items]
Credit facility				$ 45,900,000
October 2024 Credit Facility
Debt Instrument [Line Items]
Line of credit facility, initiation date				Oct. 18, 2024
Outstanding borrowings		$ 80,600,000
Line of credit facility, covenant compliance								As of December 31, 2024, the Company was in compliance with all covenants under the October 2024 Credit Facility.
Increase in borrowing capacity							$ 27,000,000
All amounts outstanding under the October 2024 Credit Facility				$ 81,100,000
October 2024 Credit Facility \| Maximum
Debt Instrument [Line Items]
Line of credit facility additional borrowing capacity							6,000,000
October 2024 Credit Facility \| Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility				10,000,000
Outstanding borrowings											$ 0
October 2024 Credit Facility \| Senior Secured Term Loan Facility
Debt Instrument [Line Items]
Credit facility				$ 1,500,000
Outstanding borrowings			$ 1,500,000
October 2024 Credit Facility \| Master Equipment Security Agreement Evidenced by Promissory Notes
Debt Instrument [Line Items]
Outstanding borrowings											$ 45,900,000
Other 2025 Financing Activity
Debt Instrument [Line Items]
Debt instrument, face amount							$ 7,200,000
Note payable to finance equipment						1,087,500				$ 1,087,500
Debt instrument, frequency of periodic payment								monthly		monthly
Debt instrument, term							5 years
Maturity date										Jan. 01, 2031
Principal installment amount						$ 7,552
Debt instrument, date of first required payment						Dec. 01, 2030
Remaining principal balance due as final balloon payment						$ 641,927				$ 641,927
Other 2025 Financing Activity \| SOFR
Debt Instrument [Line Items]
Interest rate							2.35%
Other 2024 Financing Activity
Debt Instrument [Line Items]
Total interest incurred								$ 2,875,518	$ 1,088,446

Revenue - Additional Information (Details1) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 524,049,423	$ 516,764,766
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 494,000,000
Remaining performance obligations, expected timing of satisfaction (in months)	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 30,000,000
Remaining performance obligations, expected timing of satisfaction (in months)	6 months

Property and Equipment, Net

3 Months Ended

Mar. 31, 2026

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

6. Property and Equipment, Net

Property and equipment, net consisted of the following:


	March 31, 2026			December 31, 2025
Office equipment and computers	$	2,008,894		$	1,760,490
Vehicles and trailers		36,319,490			30,252,251
Machinery and equipment		156,250,241			118,867,241
Leasehold improvements		1,230,007			1,041,123
Construction in progress		10,459,146			8,018,256
Total property and equipment		206,267,778			159,939,361
Accumulated depreciation		(80,725,787	)		(75,037,759	)
Total Property and equipment, net	$	125,541,991		$	84,901,602

Depreciation expense included in the condensed consolidated statements of operations was $5,702,410 and $5,071,341 for the three months ended March 31, 2026 and 2025 respectively. The Company recorded a gain of $2,397 and $110,945 on the sale of property and equipment in the condensed consolidated statements of operations for the three months ended March 31, 2026 and 2025.

The Company capitalized interest of $140,844 during the quarter ended March 31, 2026 to Construction in progress. No interest was capitalized in the three months ended March 31, 2025, as no qualifying construction activities were in progress.

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2026	May 08, 2026
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2026
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Entity Registrant Name	Cardinal Infrastructure Group Inc
Entity Central Index Key	0002079999
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity File Number	001-43004
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	39-3180206
Entity Address, Address Line One	100 E. Six Forks Road
Entity Address, Address Line Two	#300
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27609
City Area Code	919
Local Phone Number	324-1964
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Class A Common Stock, $0.0001 Par Value
Security Exchange Name	NASDAQ
Trading Symbol	CDNL
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		15,292,984
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		27,573,875

Contract Assets and Liabilities, and Provision for Contract Losses - Additional Information (Details)	3 Months Ended
	Mar. 31, 2026 USD ($) Contract	Mar. 31, 2025 USD ($) Contract	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Disaggregation of Revenue [Line Items]
Increase (decrease) in contract assets	$ 19,716,683	$ 1,273,858
Contract assets increased	30,343,981
Contract liabilities decreased	(1,162,192)
Increase (decrease) in contract liabilities	(2,053,018)	(1,619,189)
Revenue recognized included in opening balance of billings in excess of costs and estimated earnings	$ 17,049,269	$ 19,826,852
Number of contracts \| Contract	8	9
Provision for contract losses	$ 20,961		$ 135,647	$ 4,039,488
AL Grading Contractors LLC
Disaggregation of Revenue [Line Items]
Increase in acquired contract assets	15,908,607
Increase in acquired contract liabilities	1,162,664
Contract Liabilities
Disaggregation of Revenue [Line Items]
Conditional retainage receivable	51,294,375		$ 35,041,181
Minimum
Disaggregation of Revenue [Line Items]
Provision for contract losses	1,000	$ 1,000
Maximum
Disaggregation of Revenue [Line Items]
Provision for contract losses	$ 5,000	$ 70,000

Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

9. Goodwill and Intangible Assets

The changes in the carrying amount of goodwill are as follows:


	Three months ended March 31, 2026
Beginning balance	$	23,510,649
Goodwill acquired in current‑period business combinations		105,109,288
Ending balance	$	128,619,937

Additions to goodwill are from acquisitions detailed in Note 3 – Business Combinations. The Company did not identify any goodwill impairment triggering events during the three months ended March 31, 2026 and 2025.

The following table presents finite-lived intangible assets, including the weighted-average useful lives for each major intangible asset category and in total:


		March 31, 2026			December 31, 2025
	Weighted Average Life (Years)	Gross Carrying Amount	Accumulated Amortization	Carrying Value	Gross Carrying Amount	Accumulated Amortization	Carrying Value
Backlog	1.4	$25,971,000	$(8,551,521)	$17,419,479	$7,542,000	$(6,479,500)	$1,062,500
Customer relationships	11.1	82,500,000	(1,752,601)	80,747,399	14,600,000	(523,808)	14,076,192
Trade name	9.5	10,071,000	(357,014)	9,713,986	500,000	(125,000)	375,000
Non-compete agreements	4.0	1,200,000	(34,521)	1,165,479	—	—	—
Total	9.1	$119,742,000	$(10,695,657)	$109,046,343	$22,642,000	$(7,128,308)	$15,513,692

In the three months ended March 31, 2026 and 2025 amortization expense was $3,567,348 and $1,527,500, respectively. The estimated aggregate amortization expense for each of the next five years is as follows:


2026	$	16,955,154
2027		17,155,685
2028		9,240,205
2029		9,240,205
2030		8,980,685
Thereafter		47,474,409
Total	$	109,046,343

Revenue - Additional Information (Details) - USD ($)	3 Months Ended
Revenue - Additional Information (Details) - USD ($)	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Disaggregation of Revenue [Line Items]
Remaining performance obligations	$ 524,049,423		$ 516,764,766
Increase in Revenue Resulted from Performance Obligation Satisfied in Prior Period	$ 674,000	$ 777,000
Standalone Paving Contracts
Disaggregation of Revenue [Line Items]
Contracts completion term	one to three months
Revenue \| Customer \| Short Duration Contracts
Disaggregation of Revenue [Line Items]
Percentage of revenue	3.00%	2.00%
Revenue \| Customer \| Fixed Price Contracts
Disaggregation of Revenue [Line Items]
Percentage of revenue	99.00%	99.00%
Revenue \| Customer \| Time and Material Billed Contracts
Disaggregation of Revenue [Line Items]
Percentage of revenue	1.00%	1.00%
Private Sector Customers
Disaggregation of Revenue [Line Items]
Contracts completion term	12 to 18 months
Private Sector Customers \| Revenue \| Customer
Disaggregation of Revenue [Line Items]
Percentage of revenue	93.00%	96.00%
Public Sector Customers \| Revenue \| Customer
Disaggregation of Revenue [Line Items]
Percentage of revenue	7.00%	4.00%

Income Taxes and Tax Receivable Agreement

3 Months Ended

Mar. 31, 2026

Income Tax Disclosure [Abstract]

Income Taxes and Tax Receivable Agreement

13. Income Taxes and Tax Receivable Agreement

The Company is subject to U.S. federal, state and local income taxes on its taxable income, including its allocable share of the taxable income of Cardinal Civil Contracting Holdings LLC (“OpCo”), and is taxed at the applicable corporate income tax rates. The Company’s actual effective tax rate is affected by its ownership percentage in OpCo, which will increase over time as continuing OpCo owners redeem or exchange their LLC interests for shares of PubCo's Class A common stock (together with cancellation of an equal number of Class B shares), or as the Company acquires LLC interests directly from such continuing OpCo owners.

Because the Company consolidates OpCo for financial reporting purposes, its consolidated effective tax rate will vary from period to period based on multiple factors, including changes in the Company’s ownership of OpCo, the geographic mix of earnings, changes in tax law, and differences in tax rates among jurisdictions. The Company’s income tax provision includes U.S. federal, state, local and foreign income taxes, as applicable.

At the end of each interim period, the Company estimates the effective tax rate expected to be applicable for the full fiscal year and this rate is applied to the results for the year-to-date period, and then adjusted for any discrete period items.

For the three month period ended March 31, 2026, the Company calculated an annual effective tax rate of 8.40% on pre-tax book income of $12,534,265 and booked a total tax expense of $1,053,229.

The Company's sole material asset is its investment in OpCo, which is treated as a partnership for U.S. income tax purposes and for purposes of certain jurisdictional income taxes. OpCo's net taxable income and any related tax credits are passed through to its partners and are included in the partners' tax returns, even though such net taxable income or tax credits may not have actually been distributed. While the Company consolidates OpCo for financial reporting purposes, the Company will be taxed on its share of earnings of OpCo not attributed to the noncontrolling interest holders, which will continue to bear their share of income tax on allocable earnings of OpCo. The income tax burden on the earnings taxed to the noncontrolling interest holders is not reported by the Company in its condensed consolidated financial statements under GAAP. As a result, the Company's effective tax rate differs materially from the statutory rate. The primary factor impacting the effective tax rate is income attributable to noncontrolling interests that is not subject to corporate income tax and non-deductible expenses. For the three month period ended March 31, 2025, and prior to the completion of the Company's IPO, Cardinal NC was organized as a limited liability company and treated as a partnership for U.S. federal and state income tax purposes. As a pass-through entity, Cardinal NC was not subject to U.S. federal corporate income tax, and no provision for corporate income taxes was recorded.

Tax Receivable Agreement

In connection with the IPO and Reorganization Transactions, PubCo entered into a tax receivable agreement (the “Tax Receivable Agreement”) with Cardinal Civil Contracting Holdings LLC and the Continuing Equity Holders, which provides for the payment by PubCo to a Continuing Equity Holders of 85% of the amount of U.S. federal, state and local income or franchise tax savings, if any, that PubCo actually realizes (or in some circumstances is deemed to realize) as a result of (i) increases in the tax basis of Cardinal Civil Contracting Holdings LLC’s assets resulting from (a) the purchase of LLC interests from such Continuing Equity Holders, including with the net proceeds from the IPO and any subsequent offerings or (b) redemptions or exchanges by such Continuing Equity Holders of LLC interests for shares of Class A common stock or for cash, as applicable, and (ii) certain other tax benefits related to PubCo making payments under the Tax Receivable Agreement. Payments under the Tax Receivable Agreement are due within five (5) business days after delivery of the applicable schedule calculating the realized tax benefits and related payment amount, once such schedule becomes final in accordance with the Tax Receivable Agreement. The benefit schedule is required to be delivered within one hundred eighty (180) calendar days after the due date (including extensions) of the applicable annual federal income tax return for the relevant taxable year, and payments are based on the actual tax savings realized by PubCo. Substantially all payments due under the Tax Receivable Agreement are payable over fifteen years following the purchase of LLC interests from Continuing Equity Holders or redemption or exchanges by Continuing Equity Holder of LLC interests. The Company will account for the income tax effects resulting from taxable redemptions or exchanges of LLC interests by Continuing Equity Holder owners for shares of Class A common stock or cash, as the case may be, and purchases by PubCo of LLC interests from Continuing Equity Holders owners by recognizing an increase in deferred tax assets, based on enacted tax rates at the date of each redemption, exchange, or purchase, as the case may be. Further, PubCo evaluates the likelihood that it will realize the benefit represented by the deferred tax asset, and, to the extent that the PubCo estimates that it is more likely than not that it will not realize the benefit, it reduces the carrying amount of the deferred tax asset with a valuation allowance. The impact of any changes in the total projected obligations recorded under the Tax Receivable Agreement as a result of actual changes in the mix of the Company’s earnings, tax legislation and tax rates in various jurisdictions, or other factors that may impact PubCo's actual tax savings realized, will be reflected in income before taxes on the condensed consolidated statements of operations in the period in which the change occurs.

As part of the ALGC acquisition on February 18, 2026, Diamond Interests Group LLC and the Seller Owners became parties to the pre-existing TRA as Continuing Equity Holders upon the issuance of their 4,186,062 OpCo units (rollover equity). Additionally, concurrently with the acquisition of ALGC, the company entered into a TBA with the Seller Owners. In connection with the accounting for ALGC acquisition, the Company recorded a fair value of $15.3 million for both the TRA and TBA liability as contingent consideration. See Note 3 for details on the valuation assumptions.

As of March 31, 2026, the tax receivable agreement liability on the condensed consolidated balance sheet totaled $39,423,529 which represents the Company's estimate of 85% of the amount of tax benefits, if any, that the Company expects to realize (or in some circumstances is deemed to realize) related to the tax basis adjustments as such savings are realized. As each of the Continuing Equity Owners elects to convert their remaining LLC Interests into Class A common stock, the Company will succeed to their aggregate historical tax basis which will create a net tax benefit to the Company. These tax benefits are expected to be amortized over 15.0 years pursuant to Sections 743(b) and 197 of the Code. The Company will only recognize

a deferred tax asset for financial reporting purposes when it is more likely than not that the tax benefit will be realized. The actual amount of deferred tax assets and related liabilities that we will recognize will differ based on, among other things, the timing of the exchanges, the price per share of our Class A common stock at the time of the exchange, and the tax rates then in effect.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Business Combinations - Schedule of Total Purchase Consideration (Details) - AL Grading Contractors LLC - USD ($)		3 Months Ended
	Feb. 18, 2026	Mar. 31, 2026
Business Combination [Line Items]
Cash	$ 115,361,840	$ 117,761,840
ALGC liabilities assumed and paid at closing	10,358,599	$ 10,358,599
Net working capital adjustment escrow (Initial Payment Escrow)	2,400,000
Rollover equity	102,809,683
Estimated net working capital adjustment payable	(8,000)
Total consideration transferred	254,665,679
Class A Common Stock
Business Combination [Line Items]
Cardinal Group Class A common stock bonus grants	8,489,557
Contingent Consideration - Tax Receivable and Benefit Agreements	$ 15,254,000

Business Combinations - Summary of Unaudited Pro Forma Information (Details) - AL Grading Contractors LLC - USD ($)	1 Months Ended	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2026	Mar. 31, 2025
Business Combination, Pro Forma Information [Line Items]
Revenue	$ 17,136,319	$ 200,073,121	$ 98,564,463
Net income, including noncontrolling interests	$ 1,237,070	$ 4,349,176	$ 5,401,361

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Equity and Noncontrolling Interest

3 Months Ended

Mar. 31, 2026

Stockholders' Equity Note [Abstract]

Equity and Noncontrolling Interest

10. Equity and Noncontrolling Interest

Equity

Subsequent to the IPO, the equity of the authorized capital of Cardinal Infrastructure Group Inc. comprises of Class A Common Stock, Class B Common Stock and Preferred Stock.

Class A Common Stock

Cardinal Infrastructure Group Inc.’s amended and restated certificate of incorporation authorizes the issuance of 500,000,000 shares of Class A Common Stock with a par value of $0.0001 per share. Each share of Class A Common Stock entitles its holder to one vote per share on all matters presented to Cardinal Infrastructure Group Inc.’s stockholders. Holders of Class A Common Stock are entitled to receive dividends when, as and if declared by the Board of Directors of Cardinal Infrastructure Group Inc. As of March 31, 2026, there were 15,292,984 shares of Class A Common Stock issued and outstanding.

Class B Common Stock

Cardinal Infrastructure Group Inc.’s amended and restated certificate of incorporation authorizes the issuance of 500,000,000 shares of Class B Common Stock with a par value of $0.0001 per share. Each share of Class B Common Stock entitles its holder to one vote per share on all matters presented to Cardinal Infrastructure Group Inc.’s stockholders. Shares of Class B Common Stock have no economic rights, including no right to receive dividends or distributions upon a liquidation of Cardinal Infrastructure Group Inc. Shares of Class B Common Stock may only be held by the Continuing Equity Holders and their respective permitted transferees. As of March 31, 2026, there were 27,573,875 shares of Class B Common Stock issued and outstanding.

Preferred Stock

Cardinal Infrastructure Group Inc.’s amended and restated certificate of incorporation authorizes the issuance of 10,000,000 shares of preferred stock with a par value of $0.0001 per share. The preferred stock may be issued by the Board of Directors in one or more series without stockholder approval, with such designations, voting powers, preferences, and relative,

participating, optional and other special rights as shall be set forth in the resolutions providing for the issuance thereof. As of March 31, 2026, no shares of preferred stock were issued or outstanding.

Noncontrolling Interest

Cardinal’s ("OpCo's") amended and restated operating agreement provides that the Continuing Equity Holders have the right (the “Redemption Right”) to cause OpCo to redeem all or a portion of their Class B LLC units, together with a corresponding number of shares of Class B Common Stock, for newly issued shares of Cardinal Infrastructure Group Inc.'s Class A Common Stock on a one-for-one basis (subject to customary adjustments for stock splits, stock dividends, and reclassifications). Alternatively, Cardinal Infrastructure Group Inc. may, at its option (the “Call Right”), elect to directly acquire the tendered LLC units and Class B Common Stock from the Continuing Equity Holder in exchange for Class A Common Stock on the same one-for-one basis.

In lieu of a share settlement, Cardinal Infrastructure Group Inc. (through at least two of its independent directors within the meaning of the Nasdaq listing rules who are disinterested) may elect to settle a redemption or exchange in cash. The cash settlement is limited to the lower of cash received from a secondary offering of equity securities, and the trailing ten-day volume-weighted average price. If Cardinal Infrastructure Group Inc. does not timely deliver an election notice, Cardinal Infrastructure Group Inc. is deemed to have elected the share settlement method.

Upon any such redemption or exchange, a corresponding number of shares of Class B Common Stock held by the exchanging Continuing Equity Holder is automatically transferred to the Company and cancelled. Any such exchange of LLC units for Class A Common Stock is accounted for as an equity transaction in accordance with ASC 810-10-45-23, with no gain or loss recognized. The LLC interests are not classified as temporary equity as the cash settlement is limited to the proceeds from a new offering of Class A Common Stock which is equity-classified.

Cardinal Infrastructure Group Inc. holds 100% of the voting rights of OpCo, is the sole managing member of OpCo and consolidates the financial results of OpCo. A portion of OpCo’s net income or loss is attributed to the noncontrolling interests based on the weighted average percentage of LLC units held by the Continuing Equity Holders relative to all outstanding LLC units during the period. The noncontrolling interests’ share of equity is based on the LLC units held by the Continuing Equity Holders as a percentage of all outstanding LLC units as of the balance sheet date. The noncontrolling interests’ ownership percentage may change over time as Continuing Equity Holders exchange LLC units for shares of Class A Common Stock.

In connection with the acquisition of ALGC (refer to Note 3), OpCo issued 4,186,062 Class B LLC units to the Seller as rollover equity, together with an equal number of shares of the Company's Class B Common Stock, par value $0.0001 per share. The Common Units and corresponding Class B Common Stock were valued at $102,809,683 based on the closing share price of the Company's Class A Common Stock of $24.56 on the acquisition date and were accounted for as consideration transferred in the business combination in accordance with ASC 805. The issuance of these Common Units increased the noncontrolling interests' ownership in OpCo, with the noncontrolling interests' share of equity determined based on the relative ownership percentages of LLC units outstanding as of the acquisition date

Additionally, we received 345,666 LLC interests in OpCo in connection with activity under 2025 Stock Incentive Plan.

The following table summarizes the ownership of LLC units of OpCo as of March 31, 2026 and December 31, 2025:


	March 31, 2026					December 31, 2025
	LLC Units		Ownership %			LLC Units		Ownership %
Cardinal Infrastructure Group Inc.		15,292,984		35.68	%		14,947,318		39.00	%
Continuing Equity Holders		27,573,875		64.32	%		23,387,813		61.00	%
Total		42,866,859		100.00	%		38,335,131		100.00	%

Operating Subsidiaries and Pre-IPO Noncontrolling Interests

The Company conducts its operations through Cardinal NC and the following wholly owned subsidiaries: Aviator Paving Company, LLC (“APC”), providing integrated paving services; Civil Transport, LLC (“CT”), providing transport services; Cardinal Civil Contracting NC, LLC (“CCCNC”), providing grading services; Civil Drilling & Blasting, LLC (“CDB”), providing drilling and blasting services; Cardinal Civil Contracting Charlotte, LLC (“CCCC”), providing expanded operations in the Charlotte, North Carolina region; Cardinal Civil Contracting Triad, LLC (“Triad”), providing expanded operations in the Greensboro, North Carolina region; Civil Underground and Boring Company, LLC (“Boring Newco”), established for

underground utility and boring services; and Aviator Paving Company Charlotte, LLC (“APCC”), providing expanded paving operations in the Charlotte market. All subsidiaries were wholly owned by Cardinal NC as of March 31, 2026.

Prior to the September 2025 Reorganization, Cardinal NC held majority but not 100% ownership interests in several of its subsidiaries. Aviator Paving Company, LLC (“APC”), formed in 2018 to provide integrated paving subcontracted services, was 60% owned by Cardinal NC. Cardinal Civil Contracting NC, LLC (“CCCNC”), formed in 2016 to provide grading services, was approximately 70% owned. Civil Drilling & Blasting, LLC (“CDB”), formed in 2022 to provide drilling and blasting services, was 90% owned. Cardinal Civil Contracting Charlotte, LLC (“CCCC”), formed in 2023 to expand operations in the Charlotte, North Carolina region through acquisitions, was approximately 75% owned after giving effect to the issuance of nonvoting units as consideration for the Purcell acquisition in January 2025. Cardinal Civil Contracting Triad, LLC (“Triad”), formed in 2025 to expand operations in the Greensboro, North Carolina region through acquisitions, was 80% owned following the issuance of nonvoting units as consideration for the Page acquisition. Civil Underground and Boring Company, LLC (“Boring Newco”), formed in March 2025 to expand into underground utility and boring services, was 70% owned following the issuance of Class B units as consideration for the contribution of certain assets by MJS & GCP, LLC. The minority equity holders in these subsidiaries were reported as noncontrolling interests in the condensed consolidated financial statements for periods prior to September 30, 2025. Effective September 30, 2025, in connection with the September 2025 Reorganization, these minority equity holders became members of Cardinal and the subsidiaries became wholly owned by Cardinal NC. The acquisition of these pre-IPO noncontrolling interests was accounted for as equity transactions in accordance with ASC 810-10-45-23, with carrying amounts reclassified to members’ equity with no gain or loss recognized.

- Definition

The entire disclosure for equity.

+ References

+ Details

Contract Assets and Liabilities, and Provision for Contract Losses (Tables)

3 Months Ended

Mar. 31, 2026

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Summary of Contract Assets and Liabilities

Contract assets and liabilities consisted of the following amounts as of each period end:


	March 31, 2026			December 31, 2025
Contract assets:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	41,029,017		$	27,949,597
Conditional retainage		44,209,224			26,944,663
Total contract assets	$	85,238,241		$	54,894,260
Contract liabilities:
Billings in excess of costs and estimated earnings on uncompleted contracts	$	16,733,562		$	18,792,435
Less: Conditional retainage		(7,085,151	)		(8,096,518	)
Provision for contract losses		20,961			135,647
Total contract liabilities	$	9,669,372		$	10,831,564
Net contract assets (liabilities)	$	75,568,869		$	44,062,696

Reconciliation of Provision for Contract Losses

The following table presents a reconciliation of the beginning and ending balances of the Company's Provision for contract losses:


	March 31, 2026			December 31, 2025
Opening balance January 1 within Contract liabilities	$	135,647		$	4,039,488
Additions - new loss provisions within Cost of revenues		3,683			9,798
Utilization - losses realized within Cost of revenues		(118,369	)		(3,913,639	)
Ending balance within Contract liabilities	$	20,961		$	135,647

Significant Accounting Policies

3 Months Ended

Mar. 31, 2026

Accounting Policies [Abstract]

Significant Accounting Policies

2. Significant Accounting Policies

Loss Provisions

The Company evaluates its contracts monthly for potential losses, which considers job performance, site conditions, estimated profitability, and associated claims and change orders. If total estimated costs exceed total expected revenue, the Company records a provision for the full estimated loss in the period the loss is determined. As of March 31, 2026 and December 31, 2025, the Company held an allowance for loss contracts of $20,961 and $135,647 respectively. These provisions are recorded to “Cost of revenues” on the consolidated statements of operations and “Contract liabilities” on the consolidated balance sheets.

Cash

The Company occasionally maintains deposits in excess of federally insured limits. These are identified as a concentration of credit risk requiring disclosure, regardless of the degree of risk. The risk is managed by maintaining all deposits in high quality financial institutions. The Federal Deposit Insurance Corporation insures up to $250,000 for all accounts held at a single institution. As of March 31, 2026, and December 31, 2025, the Company had not experienced any losses on these accounts. Any loss incurred or a lack of access to such funds could have a significant adverse impact on the Company's financial condition, results of operations, and cash flows.

Accounts Receivable, Net

Accounts receivable primarily consist of trade receivables due from customers and are stated at the invoiced amount less an allowance for credit losses. Collectability is evaluated using a combination of factors, including past due status based on contractual terms, trends in write-offs and the age of the receivable. Specific events, such as bankruptcies, are also considered when applicable. Adjustments to the reserve for credit losses are made when necessary based on the results of analysis, the aging of receivables and historical and industry trends. The Company periodically evaluates the impact of observable external factors on the collectability of the accounts receivable to determine if adjustments to the reserve for credit losses should be made based on current conditions or reasonable and supportable forecasts. Accounts receivable are written off in the period in which the receivable is deemed uncollectible. Credit related reserves are not material. At March 31, 2026, and December 31, 2025, the Company's allowance for estimated expected credit losses was zero. The opening balance of Accounts receivable, net at January 1, 2025 was $38,304,817.

Change in Accounting Estimate - Property and Equipment Depreciation Method

During the first quarter of 2026, the Company completed a review of its accounting policy for property and equipment depreciated on an accelerated basis. As a result of this review, the Company changed its accounting method for property and equipment from the accelerated basis of depreciation to the straight-line method of depreciation, effective as of January 1, 2026. The Company believes the change from the accelerated method to the straight-line method of depreciation is preferable under U.S. GAAP as it will result in an estimate of depreciation expense which more accurately reflects the pattern of usage and the expected benefits of such assets. Additionally, the change to the straight-line method of depreciation is consistent with the depreciation method applied by other companies within the Company's industry, and improves the comparability of our results to our competitors. Our change in the method of depreciation is considered a change in accounting estimate effected by a change in accounting principle and has been applied prospectively.

The effect of the change on the three months ended March 31, 2026 was a decrease in depreciation expense of approximately $581,223 and a corresponding increase in income before income taxes of approximately $581,223, compared to what would have been reported under the accelerated method. The effect on net income and earnings per diluted share was

approximately $459,166 and $0.03 for the three months ended March 31, 2026. The fixed assets will be depreciated over their estimated remaining useful lives as follows:


Asset Group		Useful Lives
Office equipment and computers		3-5 years
Vehicles and trailers		5 years
Machinery and equipment		5-7 years
Leasehold improvements		15 years

Segment Information

The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The CODM manages the business activities on a consolidated basis and as such the Company determined it is a single reportable segment. Except for to the acquisition of ALGC which performs construction projects within Georgia, the Company derives revenue in the United States of America from construction projects based in North Carolina and South Carolina in 2026.

The CODM primarily assesses performance for the Company and decides how to allocate resources based on net income. Net income is reported on the condensed consolidated statements of operations. Performance is continuously monitored at the consolidated level and as necessary at the project contract level to timely identify deviations from the expected results. Resource allocation is based on the CODM and Company management's estimates of growth to expand backlog and to increase production capacity to ensure timely execution of committed sales contracts. The significant expenses reviewed by the CODM, which are used to assess performance of the Company, are not disaggregated at a level lower than the captions disclosed within the condensed consolidated statements of operations.

The measure of segment assets is reported to the CODM on the balance sheet as total consolidated assets, with the same captions as the condensed consolidated balance sheets. All of the Company's long-lived assets are based in its home country, the United States of America.

For the three months ended March 31, 2026 and 2025, the Company recognized revenue from Customer A that comprised 13% and 11%, respectively, of consolidated Company revenue, and the Company's revenue with that customer was comprised of multiple projects with work performed throughout the year.

Fair Value Measurements

The Company determines fair value based upon the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date, as determined by either the principal market or the most advantageous market in which it transacts. The Company applies fair value accounting for all the financial assets and liabilities that are recognized or disclosed at fair value in the condensed consolidated financial statements on a recurring basis. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

Level 1 – Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date;

Level 2 – Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs are based on the Company’s own assumptions about current market conditions and require significant management judgment or estimation.

As of March 31, 2026, March 31, 2025, and December 31, 2025, the carrying value of cash, accounts receivable, accounts payable, accrued liabilities, and other current assets and liabilities approximates fair value due to the short maturities of these instruments. The fair value of notes payable approximates its carrying value as the stated interest rate reflects recent market conditions for similar instruments. Certain assets, including goodwill and other long-lived assets, are also subject to measurement at fair value on a nonrecurring basis if they are deemed to be impaired as a result of an impairment review.

As discussed in Note 3, the Company’s February 2026 Acquisition of ALGC resulted in the recognition of certain assets measured at fair value in accordance with ASC 820. Property, plant and equipment were valued using Level 2 inputs under the fair value hierarchy, based on observable market data for similar assets with adjustments for condition and location. The backlog intangible asset was valued using Level 3 inputs, which incorporate significant unobservable assumptions developed by management. Contingent Consideration was valued utilizing Level 3 inputs, which incorporate significant unobservable assumptions developed by management. The valuation techniques, key assumptions, and sensitivity analyses for Level 3 measurements are described in Note 3. The fair value of cash flow hedges are valued utilizing Level 2 inputs, which incorporate observable market inputs, including the SOFR forward curve. The valuation techniques, key assumptions, for Level 2 measurements are described in Note 7.

Derivatives

Derivative Financial Instruments The Company may enter into interest rate derivatives to manage exposure to interest rate risks. The Company does not use derivative financial instruments for trading or speculative purposes. The Company recognizes derivative financial instruments at fair value and presents them within other assets and liabilities in the condensed consolidated balance sheets. Gains and losses from derivatives that are neither designated nor qualify as hedging instruments are recognized within the change in fair value of derivatives and other caption in the condensed consolidated statements of comprehensive income. For derivatives that qualify as cash flow hedges, the gain or loss is reported as a component of other comprehensive income (loss) and reclassified into earnings in the periods during which the hedged forecasted transaction affects earnings. Refer to Note 7 'Notes Payable & Credit Facility' for further information.

Cash flows for derivative financial instruments are classified as cash flows from operating activities within the condensed consolidated statements of cash flows, unless there is an other-than-insignificant financing element present at inception of the derivative financial instrument. For derivatives with an other-than-insignificant financing element at inception due to off-market terms, cash flows are classified as cash flows from investing or financing activities within the condensed consolidated statements of cash flows depending on the derivative's off-market nature at inception.

Equity-Based Compensation

The Company issues various forms of equity‑based awards to employees, directors, and other service providers, including (i) legacy Profit Interest Units (“PIUs”) granted prior to the Company’s IPO and Up‑C reorganization, (ii) certain unrestricted legacy units issued in connection with the Company’s historical LLC structure and the reorganization transactions completed in connection with the IPO, and (iii) Restricted Stock Units (“RSUs”) granted under the Company’s 2025 Equity Incentive Plan.

The Company measures and recognizes the cost of employee services received in exchange for awards of equity instruments in accordance with ASC 718, Compensation - Stock Compensation. Equity‑classified awards are measured at grant‑date fair value and recognized as compensation expense over the requisite service period. Liability‑classified awards, if any, are remeasured at fair value at each reporting date until settlement. Compensation expense is recorded within General and administrative expenses in the condensed consolidated statements of operations

PIUs in CCC and certain subsidiaries have been granted to certain employees of the Company. As the requirement to remain employed for the necessary service period and the performance vesting criteria are based on the performance of the Company, the Company has pushed down the related compensation expense. In accounting for stock-based compensation awards, the Company measures and recognizes the cost of employee services received in exchange for awards of equity instruments based on the grant date fair value of those awards. Compensation expense for time-vesting awards is recognized ratably using the straight-line attribution method over the vesting period, which is considered to be the requisite service period and will be accelerated upon a change in control. For compensation expense for awards with performance vesting criteria, no compensation expense has been recognized as the vesting criteria is not viewed as probable.

In connection with the Company’s historical LLC structure and the Up‑C reorganization completed at the IPO, certain employees and service providers received unrestricted units that were fully vested upon issuance. These awards are accounted for as equity‑classified awards. Because the units were fully vested and nonforfeitable at the grant date, the Company recognized compensation expense, if any, on the grant date. No additional compensation expense is recognized for these awards.

Effective upon the IPO, the Company granted RSUs to members of its Board of Directors as part of annual director compensation, with vesting terms that vary by award. In connection with the IPO, non-employee directors received two grants in lieu of a pro-rated annual cash retainer: one that vested on December 31, 2025, and one that vests on December 31, 2026. In addition, RSUs granted in lieu of the 2026 annual cash retainers vest in equal quarterly installments through December 31, 2026. These awards are accounted for under ASC 718 using the same grant‑date fair value measurement and recognition principles as employee awards. For awards with graded-vesting features and only service conditions the Company attribute expenses using the straight-line method.

The Company has elected to account for forfeitures as they occur for all its equity-based awards and therefore does not estimate expected forfeitures when measuring stock‑based compensation expense.

Grant‑date fair value for RSUs is based on the market price of the Company’s Class A common stock on the date of grant. Grant‑date fair value for PIUs and other legacy awards is determined using valuation techniques as described within Note 11.

Class A Common Stock issued as consideration in a business combination is valued at the closing share price on the acquisition date. Shares issued at the direction of selling shareholders to settle existing arrangements with the recipients are treated as consideration transferred rather than post-combination compensation expense. Refer to Note 3 and Note 11.

For equity‑classified awards, deferred tax assets are recognized for deductible temporary differences arising from stock‑based compensation and are reduced by a valuation allowance if it is more likely than not that the deferred tax assets will not be realized. Excess tax benefits or deficiencies, if any, are recognized in income tax expense in the period in which they occur. Prior to the IPO, PIUs and other partnership‑classified awards generally did not give rise to deferred tax assets.

Other Accounting Policies

See the Company's Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”) for a description of other accounting principles upon which basis the accompanying condensed consolidated financial statements were prepared.

Recently Adopted Accounting Standards

In July 2025, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2025‑05 “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets”, which provides a practical expedient for measuring expected credit losses on certain short‑term receivables and contract assets when credit losses are expected to be insignificant. The amendments are intended to simplify application of Topic 326 for entities with immaterial credit risk exposure on these balances. ASU 2025‑05 is effective for fiscal years, including interim periods, beginning after December 15, 2025. Early adoption is permitted. There is no material impact on the condensed consolidated financial statements.

Recently Issued Accounting Standards Not Yet Adopted

In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements (“ASU 2023-06”), to clarify or improve disclosure and presentation requirements of a variety of topics and align the requirements in the FASB ASC with the SEC’s regulations. The amendments in ASU 2023-06 will become effective on the date the related disclosures are removed from Regulation S-X or Regulation S-K by the SEC, and will no longer be effective if the SEC has not removed the applicable disclosure requirement by June 30, 2027. Early adoption is prohibited and is not expected to have a material impact on our condensed consolidated financial statements.

In November 2024, the FASB issued ASU 2024-03 as an update to ASC Topic 220-40, which will be effective for fiscal years beginning after December 15, 2026 and interim periods beginning after December 15, 2027. Early adoption is permitted. ASU 2024-03 was issued to improve the disclosures about a public business entity's expenses and address request from investors for more disaggregated disclosures about the types of expenses (including employee compensation, depreciation, and amortization) in commonly presented expense captions (such as general and administrative expenses). In January 2025, the FASB issued ASU 2025‑01 “Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date” to clarify the effective date provisions of ASU 2024‑03 related to expense disaggregation disclosures. The Company is currently evaluating the impact of ASU 2024-03 on its condensed consolidated financial statements.

In May 2025, the FASB issued ASU 2025‑04 “Compensation – Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606): Clarifications to Share-Based Consideration Payable to a Customer”, which clarifies the accounting for share‑based consideration payable to a customer, including classification and measurement guidance, to reduce diversity in practice. The amendments are effective for fiscal years, including interim periods, beginning after December 15, 2026, with early adoption permitted. The Company is currently assessing the impact of adopting ASU 2025‑04 on its condensed consolidated financial statements but does not expect a material impact.

In November 2025, the FASB issued ASU 2025‑09, "Derivatives and Hedging (Topic 815): Hedge Accounting Improvements". The amendments provide targeted improvements intended to better align hedge accounting with entities’ risk‑management activities, including expanded eligibility for grouping forecasted transactions with similar risk exposures, clarified guidance for hedging forecasted interest payments on choose‑your‑rate variable‑rate debt, expanded component hedging for nonfinancial items, conditions under which a net written option may qualify as a hedging instrument, and the ability to designate foreign‑currency‑denominated debt simultaneously as both a hedging instrument and a hedged item. ASU 2025‑09 is effective for fiscal years beginning after December 15, 2026, including interim periods within those fiscal years. Early

adoption is permitted. The Company is currently evaluating the impact of ASU 2025‑09 on its condensed consolidated financial statements and related disclosures.

In December 2025, the FASB issued ASU 2025‑11, "Interim Reporting (Topic 270): Narrow‑Scope Improvements". The amendments clarify the applicability of the interim reporting guidance in Topic 270, improve the navigability of the interim reporting requirements, and provide a more comprehensive framework for interim disclosures, including a principle that entities disclose events and changes since the last annual reporting period that have a material effect on the entity. ASU 2025‑11 is effective for public business entities for interim reporting periods within annual reporting periods beginning after December 15, 2027, and for all other entities for interim reporting periods within annual reporting periods beginning after December 15, 2028. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2025‑11 on its interim financial statements and related disclosures.

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Schedule Of Intangible Assets [Line Items]
Weighted Average Life (Years)	9 years 1 month 6 days
Gross Carrying Amount	$ 119,742,000	$ 22,642,000
Accumulated Amortization	(10,695,657)	(7,128,308)
Carrying Value	$ 109,046,343	15,513,692
Backlog
Schedule Of Intangible Assets [Line Items]
Weighted Average Life (Years)	1 year 4 months 24 days
Gross Carrying Amount	$ 25,971,000	7,542,000
Accumulated Amortization	(8,551,521)	(6,479,500)
Carrying Value	$ 17,419,479	1,062,500
Customer Relationships
Schedule Of Intangible Assets [Line Items]
Weighted Average Life (Years)	11 years 1 month 6 days
Gross Carrying Amount	$ 82,500,000	14,600,000
Accumulated Amortization	(1,752,601)	(523,808)
Carrying Value	$ 80,747,399	14,076,192
Trade Name
Schedule Of Intangible Assets [Line Items]
Weighted Average Life (Years)	9 years 6 months
Gross Carrying Amount	$ 10,071,000	500,000
Accumulated Amortization	(357,014)	(125,000)
Carrying Value	$ 9,713,986	375,000
Non-compete Agreements
Schedule Of Intangible Assets [Line Items]
Weighted Average Life (Years)	4 years
Gross Carrying Amount	$ 1,200,000	0
Accumulated Amortization	(34,521)	0
Carrying Value	$ 1,165,479	$ 0

Property and Equipment, Net - Summary of Property and Equipment, Net (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 206,267,778	$ 159,939,361
Accumulated depreciation	(80,725,787)	(75,037,759)
Total Property and equipment, net	125,541,991	84,901,602
Office Equipment and Computers
Property, Plant and Equipment [Line Items]
Total property and equipment	2,008,894	1,760,490
Vehicles and Trailers
Property, Plant and Equipment [Line Items]
Total property and equipment	36,319,490	30,252,251
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	156,250,241	118,867,241
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	1,230,007	1,041,123
Construction in Progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 10,459,146	$ 8,018,256

Equity and Noncontrolling Interest - Additional Information (Details)			3 Months Ended
	Feb. 18, 2026 USD ($) $ / shares shares	Aug. 31, 2025	Mar. 31, 2026 USD ($) $ / shares shares	Dec. 31, 2025 USD ($) $ / shares shares	Feb. 28, 2026 $ / shares
Class of Stock [Line Items]
Preferred stock, shares authorized			10,000,000	10,000,000
Preferred stock, par value \| $ / shares			$ 0.0001	$ 0.0001
Preferred stock, shares issued			0	0
Preferred stock, shares outstanding			0	0
Description of redemption			Cardinal’s ("OpCo's") amended and restated operating agreement provides that the Continuing Equity Holders have the right (the “Redemption Right”) to cause OpCo to redeem all or a portion of their Class B LLC units, together with a corresponding number of shares of Class B Common Stock, for newly issued shares of Cardinal Infrastructure Group Inc.'s Class A Common Stock on a one-for-one basis (subject to customary adjustments for stock splits, stock dividends, and reclassifications). Alternatively, Cardinal Infrastructure Group Inc. may, at its option (the “Call Right”), elect to directly acquire the tendered LLC units and Class B Common Stock from the Continuing Equity Holder in exchange for Class A Common Stock on the same one-for-one basis.
Gain or loss on exchange of equity transaction \| $			$ 0
Gain or loss recognized \| $				$ 0
OpCo
Class of Stock [Line Items]
Percentage of voting rights			100.00%
OpCo \| AL Grading Contractors LLC
Class of Stock [Line Items]
Common unit, issued	4,186,062
OpCo \| AL Grading Contractors LLC \| 2025 Plan
Class of Stock [Line Items]
Business combination, equity interest, share issued			345,666
Cardinal NC \| Aviator Paving Company LLC
Class of Stock [Line Items]
Ownership interests in subsidiary		60.00%
Cardinal NC \| Cardinal Civil Contracting NC LLC
Class of Stock [Line Items]
Ownership interests in subsidiary		70.00%
Cardinal NC \| Civil Drilling & Blasting, LLC
Class of Stock [Line Items]
Ownership interests in subsidiary		90.00%
Cardinal NC \| Cardinal Civil Contracting Charlotte, LLC
Class of Stock [Line Items]
Ownership interests in subsidiary		75.00%
Cardinal NC \| Cardinal Civil Contracting Triad, LLC
Class of Stock [Line Items]
Ownership interests in subsidiary		80.00%
Cardinal NC \| Civil Underground and Boring Company, LLC
Class of Stock [Line Items]
Ownership interests in subsidiary		70.00%
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized			500,000,000	500,000,000
Common stock, par value per share \| $ / shares			$ 0.0001	$ 0.0001
Common stock voting rights			Each share of Class A Common Stock entitles its holder to one vote per share on all matters presented to Cardinal Infrastructure Group Inc.’s stockholders.
Common stock, shares issued			15,292,984	14,947,318
Common stock, shares outstanding			15,292,984	14,947,318
Class A Common Stock \| AL Grading Contractors LLC \| 2025 Plan
Class of Stock [Line Items]
Common stock, par value per share \| $ / shares	$ 0.0001
Closing share price \| $ / shares	$ 24.56
Business combination, equity interest, share issued	345,666
Class A Common Stock \| OpCo \| AL Grading Contractors LLC
Class of Stock [Line Items]
Closing share price \| $ / shares					$ 24.56
Consideration transferred in business combination \| $	$ 102,809,683
Class A Common Stock \| OpCo \| Continuing Equity Holders
Class of Stock [Line Items]
Stock split ratio			1
Class A Common Stock \| OpCo \| Cardinal Infrastructure Group Inc.
Class of Stock [Line Items]
Stock split ratio			1
Class B Common Stock
Class of Stock [Line Items]
Common stock, shares authorized			500,000,000	500,000,000
Common stock, par value per share \| $ / shares			$ 0.0001	$ 0.0001
Common stock voting rights			Each share of Class B Common Stock entitles its holder to one vote per share on all matters presented to Cardinal Infrastructure Group Inc.’s stockholders.
Common stock, shares issued			27,573,875	23,387,813
Common stock, shares outstanding			27,573,875	23,387,813
Class B Common Stock \| OpCo \| AL Grading Contractors LLC
Class of Stock [Line Items]
Common stock, par value per share \| $ / shares	$ 0.0001

Notes Payable & Credit Facility - Summary of Notes payable (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025	Sep. 30, 2025
Debt Instrument [Line Items]
Total Notes Payable	$ 198,633,570	$ 121,178,878
Less Current Portion	10,129,136	6,128,674
Less Unamortized Debt Issuance Costs	2,605,513	1,897,340
Long-Term Portion	185,898,921	113,152,864
October 2025 Credit Facility
Debt Instrument [Line Items]
Total Notes Payable	197,500,000	120,000,000
Financial Institution One
Debt Instrument [Line Items]
Total Notes Payable	1,064,844	1,087,500
Unsecured Subordinated Notes Payable To Various Sellers
Debt Instrument [Line Items]
Total Notes Payable	$ 68,726	$ 91,378	$ 0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

Notes Payable & Credit Facility - Summary of Notes payable (Parenthetical) (Details) - USD ($)		3 Months Ended
	Oct. 01, 2025	Mar. 31, 2026	Feb. 28, 2026	Feb. 18, 2026	Dec. 31, 2025	Sep. 30, 2025
Debt Instrument [Line Items]
Outstanding notes payable		$ 198,633,570			$ 121,178,878
October 2025 Credit Facility
Debt Instrument [Line Items]
Term loan advance			$ 80,000,000	$ 80,000,000
Effective interest rate		6.57%
Maturity date		Oct. 31, 2030
Debt instrument, payment terms		Quarterly principal installments of $2.5 million are due through September 30, 2027, $3.75 million from December 31, 2027 through September 30, 2030, with the remaining principal due as a final balloon payment on October 31, 2030. The effective interest rate, inclusive of the amortization of deferred financing costs, was 6.57% at March 31, 2026
Outstanding notes payable		$ 197,500,000			120,000,000
Minimum \| October 2025 Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount			120,000,000
Maximum \| October 2025 Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount			$ 200,000,000
Redemption, Period One \| October 2025 Credit Facility
Debt Instrument [Line Items]
Principal installment amount		2,500,000
Redemption, Period Two \| October 2025 Credit Facility
Debt Instrument [Line Items]
Principal installment amount		$ 3,750,000
SOFR \| October 2025 Credit Facility
Debt Instrument [Line Items]
Interest rate		2.375%
SOFR \| Minimum \| October 2025 Credit Facility
Debt Instrument [Line Items]
Interest rate	1.875%
SOFR \| Maximum \| October 2025 Credit Facility
Debt Instrument [Line Items]
Interest rate	2.625%
Financial Institution One
Debt Instrument [Line Items]
Effective interest rate		6.20%
Maturity date		Jan. 01, 2031
Debt instrument, frequency of periodic payment		Monthly
Outstanding notes payable		$ 1,064,844			1,087,500
Remaining principal balance due as final balloon payment		641,927
Financial Institution One \| Redemption, Period Five
Debt Instrument [Line Items]
Principal installment amount		$ 7,552
Unsecured Subordinated Notes Payable To Various Sellers
Debt Instrument [Line Items]
Effective interest rate		5.00%
Outstanding notes payable		$ 68,726			$ 91,378	$ 0
Unsecured Subordinated Notes Payable To Various Sellers \| Redemption, Period Three
Debt Instrument [Line Items]
Principal installment amount		$ 125,000
Effective interest rate		7.00%
Debt instrument, frequency of periodic payment		quarterly
Unsecured Subordinated Notes Payable To Various Sellers \| Redemption, Period Four
Debt Instrument [Line Items]
Principal installment amount		$ 25,422
Effective interest rate		5.00%
Debt instrument, frequency of periodic payment		semi-annual

Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Current assets:
Cash	$ 43,982,867	$ 97,149,425
Accounts receivable, net	96,631,099	61,282,268
Contract assets	85,238,241	54,894,260
Prepaid expenses	1,686,826	1,892,615
Other assets	540,049	432,584
Total current assets	228,079,082	215,651,152
Property and equipment, net	125,541,991	84,901,602
Operating lease right-of-use assets	20,438,873	8,929,742
Goodwill	128,619,937	23,510,649
Intangible assets, net	109,046,343	15,513,692
Deferred tax assets	45,095,262	46,080,518
Other non-current assets	430,427	0
Total assets	657,251,915	394,587,355
Current liabilities:
Current portion of notes payable	10,129,136	6,128,674
Current portion of finance lease liabilities	3,487,722	3,349,359
Current portion of operating lease liabilities	5,455,264	3,814,686
Accounts payable	94,734,950	60,600,099
Accrued expenses	8,172,033	2,956,314
Deferred consideration payable	200,001	3,966,618
Contract liabilities	9,669,372	10,831,564
Other current liabilities	22,178	0
Total current liabilities	131,870,656	91,647,314
Notes payable, less current portion, net of unamortized debt issuance costs	185,898,921	113,152,864
Finance lease liabilities, less current portion	4,993,315	4,974,309
Operating lease liabilities, less current portion	17,255,749	5,851,516
Tax receivable agreement liability	39,423,529	39,423,529
Contingent consideration	15,254,000	0
Other non-current liabilities	554,159	0
Total liabilities	395,250,329	255,049,532
Commitments and contingencies (Note 15)
Stockholders' equity
Preferred stock, $0.0001 par value, 10,000,000 shares authorized, no shares issued and outstanding as of March 31, 2026 and December 31 2025
Additional paid-in capital	66,275,188	57,593,814
Retained earnings	4,282,031	863,593
Accumulated other comprehensive loss	(151,904)	0
Noncontrolling interests	191,591,984	81,076,582
Total stockholders' equity	262,001,586	139,537,823
Total liabilities and stockholders' equity	657,251,915	394,587,355
Class A Common Stock
Stockholders' equity
Common stock, value	1,530	1,495
Class B Common Stock
Stockholders' equity
Common stock, value	$ 2,757	$ 2,339

Leases - Additional Information (Details)	Mar. 31, 2026	Mar. 31, 2025
Lessee, Lease, Description [Line Items]
Weighted-average discount rate for operating leases	6.84%	5.53%
Weighted-average remaining operating lease term	6 years 6 months 10 days	2 years 9 months 14 days
Weighted-average discount rate for finance leases	4.80%	4.56%
Weighted-average remaining lease term	2 years 5 months 8 days	2 years 5 months 19 days

Stock-Based Compensation - Additional Information (Details) - USD ($)			1 Months Ended		3 Months Ended
	Feb. 18, 2026	Nov. 13, 2025	Dec. 31, 2025	Nov. 30, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 11, 2025
Class A Common Stock
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Common stock, par value per share			$ 0.0001		$ 0.0001
Class A Common Stock \| IPO
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
IPO price per share							$ 21
Common stock, par value per share							$ 0.0001
2025 Plan \| Class A Common Stock
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Outstanding shares percentage		5.00%
2025 Plan \| Class A Common Stock \| AL Grading Contractors LLC
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued	345,666
Shares valued	$ 8,489,557
Closing share price	$ 24.56
Stock available for issuance					3,276,757
Common stock, par value per share	$ 0.0001
2025 Plan \| Class A Common Stock \| Maximum
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Authorized shares		3,660,656
December 2025 Director Stock Awards & 2026 Retainer Awards
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized compensation cost					$ 547,380
Unvested awards					31,565
Weighted average grant date fair value per award					$ 21.93
Weighted-average period					12 months
December 2025 Director Stock Awards & 2026 Retainer Awards \| Non-Employee Director \| Restricted Stock Units (RSUs)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Annual cash retainer				$ 75,000
Grant date fair value				100,000
Rsu's issued						12,404
Stock-based compensation expense						$ 191,852
Stock based compensation expense						$ 191,852
December 2025 Director Stock Awards & 2026 Retainer Awards \| Committee Chairpersons \| Restricted Stock Units (RSUs)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Additional annual grant value				12,500
December 2025 Director Stock Awards & 2026 Retainer Awards \| Other Committee Members \| Restricted Stock Units (RSUs)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Grant value				$ 5,000
December 2025 Director Stock Awards & 2026 Retainer Awards \| IPO
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
IPO price per share			$ 24.18
December 2025 Director Stock Awards & 2026 Retainer Awards \| IPO \| Newly Appointed Directors \| Restricted Stock Units (RSUs)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Grant date fair value			$ 18,750
Grant value plus applicable committee grants			$ 100,000

Condensed Consolidated Statements of Operations (Unaudited) - USD ($)

3 Months Ended

Mar. 31, 2026

Mar. 31, 2025

Income Statement [Abstract]

Revenues

$ 167,508,716

$ 81,801,265

Cost of revenues, excluding depreciation and amortization

133,319,083

65,277,978

General and administrative

10,142,131

2,125,970

Depreciation expense

5,702,410

5,071,341

Amortization expense

3,567,348

1,527,500

(Gain) on disposal of property and equipment

(2,397)

(110,945)

Income from operations

14,780,141

7,909,421

Other expense:

Interest expense, net

(2,245,876)

(1,026,276)

Other expense, net

(241,400)

Total other expense, net

(2,245,876)

(1,267,676)

Net income before taxes

12,534,265

6,641,745

Income tax expense

(1,053,229)

Net income

11,481,036

6,641,745

Less: Net income attributable to noncontrolling interests

8,062,598

1,164,764

Net income attributable to Cardinal Infrastructure Group Inc.

$ 3,418,438

$ 5,476,981

Earnings per share:

Basic earnings per share

^[1]

$ 0.23

Diluted earnings per share

^[1]

$ 0.23

Weighted average shares of Class A common stock outstanding:

Weighted average shares of common stock outstanding, Basic

^[1]

15,104,788

Weighted average shares of common stock outstanding, Diluted

^[1]

15,126,679

[1]	(1) Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period following the recapitalization transactions and IPO (see Note 14)

Revenue

3 Months Ended

Mar. 31, 2026

Revenue from Contract with Customer [Abstract]

Revenue

5. Revenue

As of March 31, 2026 and December 31, 2025, the Company’s remaining performance obligations were $524,049,423 and $516,764,766, respectively, all of which is expected to be recognized within the next eighteen months. As of March 31, 2026 the Company expects to recognize $494.0 million within the next 12 months and the remaining $30 million in the period from 13 to 18 months from these performance obligations. These amounts represent the aggregate amount of revenue expected to be recognized on contracts for which performance has commenced but is not yet complete. These obligations are derived from the transaction price allocated to unsatisfied or partially satisfied performance obligations under existing contracts.

Revenue recognized in the period from performance obligations satisfied in prior periods resulted in a net increase of approximately $674,000 in 2026, and an increase of $777,000 in 2025. These changes were primarily due to the resolution of previously unresolved change orders.

In the three months ended March 31, 2026 and 2025, the Company's sales projects all reside within the same geographical market: North Carolina, South Carolina, and Georgia in the United States. The Company expanded its presence in the Charlotte, North Carolina market through the acquisitions of Purcell in January 2025, and Red Clay in October 2025, expanded its presence in the Greensboro, North Carolina market through the acquisition of Page in May 2025, and entered the Atlanta, Georgia market through the acquisition of ALGC in February 2026 (Note 3). The Company historically has minimal credit loss from collections and therefore believes the collections and economic risks across its customers are similar.

The Company's customers in the Private sector primarily consist of national and regional home builders. Public sector customers include government agencies such as the department of transportation. Private sector customers comprised 93% of the Company's revenue in 2026 and 96% in 2025, while Public sector customers comprised 7% of the Company's revenue in 2026 and 4% in 2025.

In the three months ended March 31, 2026 and 2025, respectively, 99% and 99% of the Company's revenue relates to fixed price contracts, with the remaining 1% and 1% relates to time and material billed contracts. Typically, there is more risk with fixed-price contracts, and unforeseen events and circumstances can alter the estimate of the costs and potential profit. However, fixed price contracts offer additional profit when the Company completes the work for less cost than originally estimated. Time and material contracts generally are subject to lower risk, and as such, the associated fees are usually lower than fees earned on fixed-price contracts.

The Company's primary customer contracts are for 'turn key land development' projects that generally take 12 to 18 months to complete. Contracts that are not turn key land development will typically be for a smaller subset of the Company's services, such as for standalone paving contracts, which generally are complete in one to three months. Revenue from these short duration contracts comprised approximately 3% of the Company's revenue in 2026, and 2% in 2025.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-15

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

+ Details

Commitments and Contingencies - (Additional Information) (Details)	3 Months Ended
	Mar. 31, 2026 USD ($) Lease
Commitments and Contingencies Disclosure [Abstract]
Management fee payable	$ 18,773
Percentage of annual adjustments of monthly management fee	2.00%
Lease term	15 years
Number of leases \| Lease	1
Total commitments	$ 16,910,000

Business Combinations

3 Months Ended

Mar. 31, 2026

Business Combination [Abstract]

Business Combinations

3. Business Combinations

During the year ended December 31, 2025, the Company completed acquisitions of Purcell Construction, Inc. (“Purcell”) on January 3, 2025, Page & Associates, Inc. (“Page”) on May 30, 2025, and Red Clay Industries, Inc. (“Red Clay”) on October 1, 2025. Refer to Note 3 'Business Combinations' of the Company's 2025 Form 10-K for further information.

Acquisition of ALGC

On February 18, 2026 (the "Acquisition Date"), Cardinal acquired 100% of the membership interests of A.L. Grading Contractors, LLC, a Georgia limited liability company ("ALGC"), pursuant to a Membership Interests Purchase and Contribution Agreement (the "MIPA") among the the Company, Cardinal ("Purchaser"), Diamond Interests Group LLC ("Seller"), and the Anthony L. Wood, Jr. (“Anthony Wood”) and Benjamin A. Wood (“Benjamin Wood” and, together with Anthony Wood, the “Seller Owners”). The acquisition was structured as a purchase of membership interests for legal purposes; however, in accordance with the intended tax treatment provisions of the MIPA and as a result of a pre-closing Q-Sub election and entity conversion, the transaction is treated as a taxable asset acquisition for U.S. federal income tax purposes under Section 1001 of the Code, resulting in a step-up in the tax basis of ALGC's assets at closing. The acquisition was accounted for as a business combination under ASC 805, Business Combinations. ALGC is engaged in the business of construction grading and installation of underground utilities throughout Georgia and this acquisition further expands the Company's geographic footprint.

The acquisition was accounted for as a business combination under ASC 805, Business Combinations. Accordingly, the assets acquired and liabilities assumed were recorded at their estimated fair values as of the ALGC Acquisition Date.

Total purchase consideration was as follows:


Purchase Consideration
Cash	$	115,361,840
Liabilities assumed and paid at closing		10,358,599
Net working capital adjustment escrow (Initial Payment Escrow)		2,400,000
Rollover equity		102,809,683
Cardinal Group Class A common stock bonus grants		8,489,557
Contingent Consideration - Tax Receivable and Benefit Agreements		15,254,000
Estimated net working capital adjustment payable		(8,000	)
Total consideration	$	254,665,679

The cash portion of the consideration was funded primarily through borrowings under the Company’s Credit Facility discussed in Note 7. In addition to the cash consideration, a significant portion of the purchase price was comprised of rollover equity issued to the sellers, as further described in Note 10. The ALGC purchase price allocation is as follows:


Preliminary Purchase Price Allocation
Cash	$	2,587,582
Accounts receivable		16,930,962
Contract assets		10,627,298
Prepaid expenses		436,555
Other assets current		199,097
Other long term assets		426,506
Property, plant and equipment		36,382,739
Operating lease right-of-use assets		4,798,645
Intangible assets:
Customer relationships		67,900,000
Backlog		18,700,000
Non-compete agreements		1,200,000
Trade name		9,300,000
Goodwill		105,109,288
Accounts payable		(11,548,286	)
Accrued expenses		(1,313,235	)
Contract liabilities		(890,826	)
Current portion of operating lease liabilities		(85,148	)
Operating lease liabilities, less current portion		(6,095,498	)
Total net assets acquired	$	254,665,679

The fair value of receivables acquired approximated their gross contractual amounts. The Company’s best estimate at the acquisition date of contractual cash flows not expected to be collected was zero, as the Company expects to collect all amounts due.

The excess of purchase consideration over the fair value of net assets acquired was recorded as goodwill. The goodwill recognized is attributable to qualitative factors such as anticipated cost synergies and future growth in the combined business, as well as the value of the acquired assembled workforce.

For income tax purposes, the acquisition was structured as a taxable purchase of a portion of the assets of ALGC, combined with a tax-deferred contribution of equity by the sellers. Consequently, a portion of the goodwill recognized is expected to be deductible for tax purposes. The Company is currently evaluating the fair value of the assets acquired for tax purposes and has not yet finalized the specific amount of tax-deductible goodwill. Any adjustments resulting from the finalization of the tax basis will be reflected as measurement period adjustments.

The tax benefits associated with such deductions will primarily accrue to the holders of OpCo LLC units, including noncontrolling interest holders.

As part of the acquisition transaction, the Company entered into two separate 15‑year lease agreements with an entity under common control with the seller to lease the existing operating and office facilities of ALGC. The contractual lease payments under these agreements exceeded market rates at the acquisition date. As a result, the Company recorded an unfavorable lease fair value adjustment of $1,380,000, which was recognized as a reduction to the operating lease right‑of‑use asset as of the acquisition date.

ALGC Condensed Consolidated Statements of Cash Flows Reconciliation

The following table reconciles the net consideration paid for the acquisition of ALGC to the amounts presented in the condensed consolidated statements of cash flows.


ALGC cash consideration paid	$	117,761,840
ALGC liabilities assumed and paid at closing		10,358,599
Less cash acquired		(2,587,582	)
Cash consideration paid for acquisitions	$	125,532,857

ALGC Pro Forma Information (Unaudited)

The Company's results include $17,136,319 of revenue and approximately $1,237,070 of net income attributable to ALGC for the period from February 18, 2026 (the ALGC Acquisition Date) through March 31, 2026, which are included in the Company’s condensed consolidated statements of operations for the quarter ended March 31, 2026. The 2026 income amount includes $1,630,696 of amortization expense of acquired backlog and other intangible assets.

Fair Value of ALGC Intangible Assets

The Company recognized identifiable intangible assets for customer relationships, contractual backlog related to non‑cancellable construction contracts in place as of the acquisition date, and the ALGC tradename. These assets are included in "Other intangible assets" on the condensed consolidated balance sheets, and each asset is considered a finite‑lived intangible asset.

The fair value of the identifiable intangible assets was determined using a Level 3 fair value measurement under ASC 820, Fair Value Measurement, as the valuation relied on significant unobservable inputs. Management determined that customer relationships represent the most significant identifiable intangible asset acquired, and accordingly, disclosures focus primarily on this asset.

Customer Relationships Asset

The Company valued customer relationships using the multi‑period excess earnings method, which estimates the present value of after‑tax cash flows attributable to existing customers after deducting contributory asset charges. Customer relationships were disaggregated into commercial, industrial, and residential components due to differences in customer behavior and risk characteristics. Commercial customer relationships were valued using an attrition rate of 16.5 percent and a discount rate of 19 percent. Industrial customer relationships were valued using an attrition rate of 20.5 percent and a discount rate of 19 percent. Residential customer relationships were valued using an attrition rate of 8.5 percent and a discount rate of 19 percent.

Other key assumptions included projected revenues and operating margins for each customer class and a tax amortization period of 15 years. Based on these assumptions, the resulting aggregate fair value of customer relationships was $67.9 million.

A hypothetical 200 basis point decrease or increase in the customer attrition rates applied consistently across the commercial, industrial, and residential customer relationship populations would, in the aggregate, result in an approximately $9.3 million increase or decrease in the fair value of customer relationships. In addition, a hypothetical 100 basis point decrease or increase in the discount rate applied uniformly across all customer relationship populations would, in the aggregate, result in an approximately $4.6 million increase or decrease in the fair value of customer relationships.

Tradename Asset

The Company valued the trade name using the relief‑from‑royalty method, which estimates the present value of after‑tax royalty payments that the Company would otherwise be required to pay to license the trade name from a third party. The trade name was valued using a pre‑tax royalty rate of 1.0 percent applied to projected revenue, a discount rate of 18 percent, and an estimated useful life of 10 years. Other key assumptions included projected revenue attributable to the trade name and a tax amortization period of 15 years. Based on these assumptions, the resulting fair value of the trade name was $9.3 million.

A hypothetical 10 basis point decrease or increase in the royalty rate would result in an approximately $0.9 million

decrease or $1.0 million increase, respectively, in the fair value of the trade name. In addition, a hypothetical 100 basis point decrease or increase in the discount rate would result in an approximately $0.4 million increase or $0.3 million decrease, respectively, in the fair value of the trade name.

Intangible Asset Amortization

The ALGC intangibles assets will be amortized straight-line over their estimated useful lives of a weighted average of 11.6 years for the customer relationships (nine years for Commercial customers, eight years for Industrial customers, 13 years for Residential customers), 18 months for backlog, four years for non-compete agreements, and ten years for the tradename. Customer relationships, non-compete agreements, and tradename amortization is included in the Amortization expense caption of the condensed consolidated statement of income, while backlog amortization is included in the “Cost of revenues, excluding depreciation and amortization” caption.

Contingent Consideration (TRA and TBA)

Tax Receivable Agreement

In connection with its December 2025 initial public offering, PubCo entered into a Tax Receivable Agreement (the "TRA") dated December 9, 2025, among PubCo, Cardinal Civil Contracting Holdings LLC ("OpCo"), and the TRA Parties named therein. As part of the ALGC acquisition on February 18, 2026, Diamond Interests Group LLC and the Seller Owners became parties to the pre-existing TRA as Continuing Equity Holders upon the issuance of their 4,186,062 OpCo units (rollover equity). Under the TRA, PubCo is obligated to pay the Continuing Equity Holders 85% of the net cash tax savings that PubCo actually realizes from the tax basis step-up in OpCo's assets attributable to future exchanges of OpCo units for PubCo Class A common stock or cash, determined on a "with and without" methodology. Payments under the TRA are contingent upon (i) future exchanges of OpCo units actually occurring and (ii) PubCo generating sufficient taxable income to utilize the resulting tax attributes. The TRA includes provisions for early termination at PubCo's election (subject to independent director approval), change-of-control acceleration, and NOL carryforward mechanics capped at 80% of annual pretax income. Interest accrues on unpaid TRA payments at SOFR plus 100 basis points.

Tax Benefit Agreement

Concurrently with the ALGC acquisition on February 18, 2026, PubCo entered into a Tax Benefit Agreement (the "TBA") dated February 18, 2026, among PubCo, OpCo, and Diamond Interests Group LLC. Under the TBA, PubCo is obligated to pay 85% of the annual Cumulative Net Realized Tax Benefit (as defined in the TBA) arising from the basis step-up in ALGC's assets attributable to the portion of the acquisition treated as a taxable asset sale under IRC Section 1001. The Realized Tax Benefit (as defined in the TBA) is computed under a "with and without" method that assumes PubCo is allocated 80% of OpCo's amortization and depreciation deductions in respect of the Basis Adjustments as defined in the TBA. Unlike the TRA, TBA payments do not require future unit exchanges; rather, they depend on PubCo generating sufficient taxable income to utilize the amortization deductions, which arise over the applicable depreciable and amortizable lives of the stepped-up assets (including immediate expensing of fixed asset step-up under bonus depreciation and 15-year amortization of intangible assets under federal tax rules). Interest on unpaid TBA payments accrues at SOFR plus 100 basis points.

Fair Value Measurement and Recognition

Both the TRA and TBA represent contingent consideration in connection with the Acquisition, as the Purchase Consideration in the purchase agreement is explicitly stated to be increased by payments made to Seller Owners under or in respect of both agreements. Accordingly, the Company recognized the TRA and TBA obligations as contingent consideration at acquisition-date fair value.

The aggregate acquisition-date fair value of the TRA and TBA was $15.3 million ($8.2 million attributable to the TRA and $7.1 million attributable to the TBA), determined using a Monte Carlo simulation model with 100,000 trials. The key inputs to the model included: (i) management's projected pretax book income for fiscal years 2026 through 2030, extended through 2053 at a normalized long-term growth rate of 3.0%; (ii) book-to-tax adjustments to convert pretax book income to a tax basis, including immediate bonus depreciation of the fixed asset step-up and 15-year amortization of intangible assets; (iii) annual net operating loss carryforward mechanics capped at 80% of pretax income in any year; (iv) an 85% payment percentage applied to cumulative net realized tax benefits; and (v) an equity volatility assumption of 58.0%, derived from the observed 20-year average equity volatility of a group of guideline public companies and re-levered to reflect the Company’s capital structure, reflecting the equity-linked nature of the underlying cash flows. A metric risk premium was applied to adjust management's pretax income projections to a risk-neutral perspective, based on the Company’s cost of equity capital of 24.0% relative to the guideline public company median. This measurement is classified within Level 3 of the ASC 820 fair value hierarchy due to the use of significant unobservable inputs, including projected taxable income, future tax rates, and the timing of future OpCo unit exchanges.

A 200 basis point increase in the discount rate variable would decrease the combined value of the TRA and TBA by $790,000, while a 200 basis point decrease would increase the value by $780,000. A 500 basis point increase in the volatility variable would decrease the combined value of the TRA and TBA by $960,000, while a 500 basis point decrease would increase the value by $900,000.

The potential undiscounted payments under the TRA and TBA have no contractual maximum. The minimum potential payment under each agreement is $0, which would occur in scenarios where PubCo does not generate taxable income sufficient to utilize the relevant tax attributes or where no future exchanges of OpCo units occur under the TRA. The expected payment period runs through approximately 2041, reflecting the 15-year IRC Section 197 amortization period for intangible assets under the TBA and the assumed timing of future OpCo unit exchanges under the TRA. Subsequent changes in the fair value of these contingent consideration liabilities are recognized in earnings in the period of change.

Fair Value of Backlog

The Company recognized an identifiable intangible asset for contractual backlog related to non‑cancellable construction contracts in place as of the acquisition dates for ALGC. The backlog assets are included in "Other intangible assets" on the condensed consolidated balance sheets. The backlog represents the estimated future profit margin to be realized from these contracts and is considered a finite‑lived intangible asset.

The fair value of the backlog was estimated using the income approach (multi-period excess earnings method) that isolates the cash flows attributable to the backlog and discounts them to present value. The calculation began with the total gross backlog amount based on signed, non‑cancellable contracts as of the acquisition date. Estimated profit margin percentages were applied to derive expected pre‑tax cash flows. The estimated pre‑tax cash flows were discounted to present value using a rate that reflects the timing and risk profile of the expected realization period.

The backlog asset is classified as a Level 3 measurement within the fair value hierarchy due to the use of significant unobservable inputs, including management’s estimates of profit margin and risk adjustments.

ALGC Backlog: For the ALGC acquisition, unobservable inputs (Level 3) to the valuation included:

•

Gross backlog totals $18.7 million, based on executed contracts, comprised of $11.3 million of residential backlog, $3.8 million of multifamily backlog, and $1.8 million each of commercial and industrial backlog

•

Estimated profit margin: 27.1% for residential, 29.6% for multifamily, 27.4% for commercial, and 28.9% for industrial backlog

•

Backlog realization period: 18 months across all backlog categories

•

Discount rate: 17% across all backlog categories

The most significant assumption in the ALGC valuation is the estimated gross margin. A hypothetical 200 basis point increase (decrease) in the profit margin assumption across each sector would increase (decrease) the combined fair value of the backlog asset by $2,700,000, and $2,400,000, respectively. Changes in the estimated realization period and discount rate would not have a material effect on the valuation given the short realization period.

The ALGC backlog intangible asset was amortized straight-line over its estimated realization period of approximately 18 months through August 2027, which reflects the pattern in which the economic benefits were expected to be consumed. Based on the ALGC backlog asset’s carrying amount at the acquisition date and its estimated 18 month useful life, $1,558,333 was recognized as amortization expense during the quarter ended March 31, 2026 in the condensed consolidated statements of operations, while $10,908,333 will be amortized in 2026 and $6,233,334 will be amortized in 2027.

ALGC and Red Clay Measurement Period

Red Clay acquisition remain within the measurement period, which is open through October 1, 2026, while the Company continues to evaluate information related to acquisition‑date fair values. The ALGC acquisition remains within the measurement period. The fair values assigned to contingent consideration, equipment, intangible assets, related deferred income tax balances, and goodwill amounts deductible for income tax purposes are preliminary and are based on the information available as of the ALGC Acquisition Date. The Company will continue to evaluate these items during the measurement period (up to 12 months from the ALGC Acquisition Date) and will record adjustments to the provisional amounts as necessary. Such adjustments may be material.

- Definition

The entire disclosure for business combination.

+ References

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+ Details

Changes in Accounting Estimates

3 Months Ended

Mar. 31, 2026

Change in Accounting Estimate [Abstract]

Changes in Accounting Estimates

12. Changes in Accounting Estimates

Accounting for customer construction contracts requires the use of various estimation techniques to determine total contract revenue and costs. The Company's cost-to-cost method for recognizing revenue include estimates and assumptions about future events, including labor productivity and availability, material costs and availability, and the complexity of work to be performed.

Estimates are updated as conditions evolve. Changes in job performance, site conditions, subcontractor performance, and scope modifications may result in revisions to estimated costs and profitability. The accuracy of revenue and profit recognition in any period depends on the reliability of these estimates. Because the Company manages a portfolio of contracts of varying size and complexity, changes in individual contract estimates may offset each other. However, significant changes in estimates can materially affect reported profitability.

Key factors contributing to changes in contract estimates include:

•

Completeness and accuracy of original bids

•

Scope changes and related cost recognition

•

Extended overhead from customer or weather-related delays

•

Subcontractor and supplier performance

•

Site conditions differing from bid assumptions (where contract remedies are unavailable)

•

Labor availability and skill levels in project geographies

•

Material availability and proximity

These factors, along with the stage of completion and margin mix of contracts in progress, may cause fluctuations in gross profit between periods, which can be significant.

Changes in estimates of contract revenue, cost, or extent of completion are accounted for in the period the changes become known. Such changes are considered normal recurring adjustments inherent in the cost-to-cost revenue recognition method. The effect of changes in estimates for contracts in progress at December 31, 2025 increased revenue for the quarter ended March 31, 2026 by $4,728,186. The effect of changes in estimates for contracts in progress at December 31, 2024 increased revenue for the quarter ended March 31, 2025 by $821,195.

Leases - Components of Lease Costs (Details) - USD ($)	3 Months Ended
Leases - Components of Lease Costs (Details) - USD ($)	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
Amortization of finance lease assets	$ 481,724	$ 749,683
Interest in finance lease liabilities	81,051	113,048
Operating lease cost	1,346,761	897,253
Total lease costs	$ 1,909,536	$ 1,759,984

Organization and Description of Business - Additional Information (Details) $ / shares in Units, $ in Millions					3 Months Ended
	Dec. 12, 2025 shares	Dec. 12, 2025 USD ($) shares	Dec. 11, 2025 $ / shares shares	Dec. 10, 2025 $ / shares shares	Mar. 31, 2026 USD ($) $ / shares shares	Dec. 31, 2025 $ / shares shares
Organization And Description Of Business [Line Items]
Preferred stock, shares authorized					10,000,000	10,000,000
Preferred stock, par value \| $ / shares					$ 0.0001	$ 0.0001
IPO
Organization And Description Of Business [Line Items]
Gross proceeds from IPO \| $		$ 277.7
Limited liability company units, issued	14,943,750	14,943,750
Net proceeds from the IPO \| $		$ 252.3
Class A Common Stock
Organization And Description Of Business [Line Items]
Common stock, par value per share \| $ / shares					$ 0.0001	$ 0.0001
Common stock, shares outstanding					15,292,984	14,947,318
Common stock voting rights					Each share of Class A Common Stock entitles its holder to one vote per share on all matters presented to Cardinal Infrastructure Group Inc.’s stockholders.
Class A Common Stock \| IPO
Organization And Description Of Business [Line Items]
Number of shares sold	1,725,000		11,500,000
Common stock, par value per share \| $ / shares			$ 0.0001
Offering price \| $ / shares			$ 21
Class B Common Stock
Organization And Description Of Business [Line Items]
Common stock, par value per share \| $ / shares					$ 0.0001	$ 0.0001
Common stock, shares outstanding					27,573,875	23,387,813
Common stock voting rights					Each share of Class B Common Stock entitles its holder to one vote per share on all matters presented to Cardinal Infrastructure Group Inc.’s stockholders.
Class B Common Stock \| IPO
Organization And Description Of Business [Line Items]
Number of shares sold		23,387,813
OpCo
Organization And Description Of Business [Line Items]
LLC Units					42,866,859	38,335,131
Ownership interest, percentage					100.00%	100.00%
Economic interest percentage of continuing equity holders					100.00%
OpCo \| Cardinal Infrastructure Group Inc.
Organization And Description Of Business [Line Items]
LLC Units					15,292,984	14,947,318
Ownership interest, percentage					35.68%	39.00%
OpCo \| Cardinal Infrastructure Group Inc. \| Class A Common Stock
Organization And Description Of Business [Line Items]
Stock split ratio					1
Cardinal Civil Contracting NC LLC \| Cardinal NC
Organization And Description Of Business [Line Items]
Ownership interest, percentage					100.00%
Continuing Equity Holders
Organization And Description Of Business [Line Items]
Economic interest percentage of continuing equity holders					61.00%
Continuing Equity Holders \| IPO
Organization And Description Of Business [Line Items]
Repayment of borrowings outstanding \| $					$ 24.3
Limited liability company units, issued	7,500,000	7,500,000
Net proceeds from the IPO \| $		$ 157.5
IPO Reorganization
Organization And Description Of Business [Line Items]
Common stock voting rights					Class A Common Stock and Class B Common Stock, each entitling the holder to one vote per share on all matters presented to stockholders
Preferred stock, shares authorized				10,000,000
Preferred stock, par value \| $ / shares				$ 0.0001
IPO Reorganization \| Class A Common Stock
Organization And Description Of Business [Line Items]
Common stock, shares outstanding				1,718,750
Stock split					86-to-one forward stock split
Stock split ratio				86
IPO Reorganization \| Class B Common Stock
Organization And Description Of Business [Line Items]
Number of shares sold				23,387,813
IPO Reorganization \| Continuing Equity Holders
Organization And Description Of Business [Line Items]
Economic interest percentage of continuing equity holders				61.00%

Leases (Tables)

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Summary of Equipment Held Under Finance Leases

Following is a summary of equipment held under the finance leases at March 31, 2026, and December 31, 2025, respectively:


	March 31, 2026			December 31, 2025
Equipment	$	16,360,122		$	15,919,545
Accumulated depreciation		(10,218,141	)		(9,975,175	)
	$	6,141,981		$	5,944,370

Schedule of Future Minimum Lease Payments

Future minimum lease payments as of March 31, 2026 were as follows:


	Finance Leases			Operating Leases
2026	$	3,153,775		$	5,029,501
2027		3,353,543			6,563,206
2028		1,562,652			4,517,490
2029		894,592			2,550,382
2030		60,093			2,168,115
Thereafter		-			8,669,700
Total future undiscounted lease payments		9,024,655			29,498,394
Less: Imputed interest		(543,618	)		(6,787,381	)
Lease liabilities		8,481,037			22,711,013
Less: Current portion of lease liabilities		(3,487,722	)		(5,455,264	)
Long-term portion of lease liabilities	$	4,993,315		$	17,255,749

Components of Lease Costs

The components of lease costs are as follows:


	For the three months ended March 31, 2026		For the three months ended March 31, 2025
Amortization of finance lease assets	$	481,724	$	749,683
Interest in finance lease liabilities		81,051		113,048
Operating lease cost		1,346,761		897,253
Short-term lease costs		—		—
Total lease costs	$	1,909,536	$	1,759,984

Schedule of Other Required Information Related to Company's Lease Obligations

Other required information related to the Company’s lease obligations were as follows:


	For the three months ended March 31, 2026			For the three months ended March 31, 2025
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$	(538,528	)	$	(599,006	)
Operating cash flows from operating leases		(1,193,081	)		(917,626	)
Assets obtained in exchange for lease obligations (non-cash)
Property and equipment via finance leases		695,897			723,438
Right-of-use assets via operating leases		11,767,913			1,495,491

Related Party Transactions - Additional Information (Details)		3 Months Ended		64 Months Ended
	Dec. 11, 2025 USD ($) shares	Mar. 31, 2026 USD ($) Lease	Mar. 31, 2025 USD ($)	Dec. 31, 2030 USD ($)	Feb. 18, 2026	Dec. 31, 2025 USD ($)	Jan. 01, 2025 USD ($)
Related Party Transaction [Line Items]
Outstanding balances due from related party		$ 96,631,099				$ 61,282,268	$ 38,304,817
Lease expense		$ 1,909,536	$ 1,759,984
Tax receivable agreement ownership percentage		85.00%
Tax receivable agreement remaining ownership percentage	15.00%
Tax receivable agreement liability		$ 39,423,529				$ 39,423,529
ALGC
Related Party Transaction [Line Items]
Lease expense		$ 75,560
Annual lease increase, Percent		3.00%
Lease terms		We expect to pay $600,000 per year through February 2041 with 3% annual increases.
Number of lease agreements \| Lease		2
Lease agreement, Term		15 years			15 years
Expected lease payments		$ 600,000
Envision \| Office Spaces
Related Party Transaction [Line Items]
Sublease income		6,546	9,535
Outstanding balances due from related party		0	0
Wellfield
Related Party Transaction [Line Items]
Outstanding balances due from related party		0	14,422
Wellfield \| Work Performed
Related Party Transaction [Line Items]
Revenue		0	0
Park
Related Party Transaction [Line Items]
Outstanding balances due from related party		0	215,738
Park \| Work Performed
Related Party Transaction [Line Items]
Revenue		14,471	$ 38,857
CCCRE Holdings
Related Party Transaction [Line Items]
Lease expense		$ 33,804
Lease terms		We expect to pay CCCRE $144,000 per year under the lease through November 2030.
Expected lease payments		$ 144,000
Lease annual base rent		1,140,000
King Road
Related Party Transaction [Line Items]
Lease expense		$ 60,000
Lease terms		We expect to pay King Road $120,000 per year through December 2030. Management believes the terms of the lease are consistent with market rates and comparable to those that could have been obtained from an unrelated third party.
King Road \| Forecast
Related Party Transaction [Line Items]
Lease monthly payment				$ 120,000
Continuing Equity Holders
Related Party Transaction [Line Items]
Redemption of shares \| shares	7,500,000
Redemption value	$ 157,500,000
Tax receivable agreement ownership percentage	85.00%

Leases - Schedule of Future Minimum Lease Payments (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Finance Leases
2026	$ 3,153,775
2027	3,353,543
2028	1,562,652
2029	894,592
2030	60,093
Total future undiscounted lease payments	9,024,655
Less: Imputed interest	(543,618)
Lease liabilities	8,481,037
Less: Current portion of lease liabilities	(3,487,722)	$ (3,349,359)
Long-term portion of lease liabilities	4,993,315	4,974,309
Operating Leases
2026	5,029,501
2027	6,563,206
2028	4,517,490
2029	2,550,382
2030	2,168,115
Thereafter	8,669,700
Total future undiscounted lease payments	29,498,394
Less: Imputed interest	(6,787,381)
Lease liabilities	22,711,013
Less: Current portion of lease liabilities	(5,455,264)	(3,814,686)
Long-term portion of lease liabilities	$ 17,255,749	$ 5,851,516

Organization and Description of Business

3 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Description of Business

1. Organization and Description of Business

Business Operations

Cardinal Infrastructure Group Inc. (“PubCo,” the “Company,” or “Cardinal Group”) is a Delaware corporation formed on June 12, 2025, for the purpose of facilitating an initial public offering (the “IPO”) and related organizational transactions in order to acquire an investment in Cardinal Civil Contracting Holdings LLC (“Cardinal” or "OpCo"). Cardinal Group is a holding company with no direct operations whose principal asset is its equity interest in Cardinal, acquired in connection with the IPO.

Cardinal is a Delaware limited liability company formed on September 16, 2025, whose primary asset is its 100% ownership interest in Cardinal Civil Contracting, LLC (“Cardinal NC”), a North Carolina limited liability company organized on January 16, 2013 that conducts all operations of the Company through its wholly owned subsidiaries.

The Company is a leading provider of site development and infrastructure services in the southeastern United States. The Company serves residential, commercial and municipal end markets and operates primarily in North Carolina and surrounding regions.

Up-C Structure

The Company’s organizational structure following the IPO is commonly referred to as an umbrella partnership–C corporation (“Up-C”) structure, which is often used by partnerships and limited liability companies undertaking an initial public offering. The Up-C structure allows the Continuing Equity Holders (as defined below) to retain their equity ownership in Cardinal, an entity treated as a partnership for U.S. federal income tax purposes, and to continue to realize tax benefits associated with owning interests in a flow-through entity. Investors in the Company hold their equity ownership through shares of Class A Common Stock of PubCo, a Delaware corporation subject to corporate-level taxation.

As the sole managing member of Cardinal, the Company operates and controls all of the business and affairs of Cardinal and, through Cardinal and its subsidiaries, conducts all of the Company’s business. Accordingly, the Company consolidates the financial results of Cardinal and reports the economic interests in Cardinal held by the Continuing Equity Holders as noncontrolling interests in the consolidated financial statements.

Initial Public Offering

On December 11, 2025, the Company completed its IPO of 11,500,000 shares of Class A Common Stock, par value $0.0001 per share, at a price to the public of $21.00 per share. On December 12, 2025, pursuant to the exercise in full of the underwriters’ option to purchase additional shares, the Company completed the sale of an additional 1,725,000 shares of Class A Common Stock at the IPO price. Gross proceeds from the IPO, including the overallotment, were approximately $277.7 million before deducting underwriting discounts and other offering costs.

The Company used the net proceeds from the IPO to purchase 14,943,750 newly issued LLC units from Cardinal for net payment of approximately $252.3 million in the aggregate and became the sole managing member of Cardinal. Cardinal in turn used $157.5 million of the net proceeds to exchange and redeem 7,500,000 LLC units of Cardinal certain equity holders of Cardinal (the “Continuing Equity Holders”) and repay approximately $24.3 million of borrowings outstanding under our October 2025 Credit Facility. In connection with the IPO, the Company also issued 23,387,813 shares of Class B Common Stock to the Continuing Equity Holders, which was equal to the number of LLC units held by such Continuing Equity Holders at the time of issuance, for nominal consideration.

Reorganization Transactions

Prior to the IPO, all of the Company’s business was conducted through Cardinal NC. In connection with the IPO, the Company completed a series of organizational transactions (the “Reorganization Transactions”) to reorganize its corporate structure. The IPO and the Reorganization Transactions are collectively referred to herein as the “Transactions.” The Reorganization Transactions consisted of two discrete transactions, the “September 2025 Reorganization” and the “IPO Reorganization,” which are each described below.

September 2025 Reorganization

Effective September 30, 2025, the Company completed the first step of the Reorganization Transactions (the “September 2025 Reorganization”). The Company merged newly formed merger subsidiaries of Cardinal NC with and into each of Cardinal NC’s non-wholly owned subsidiaries so that the minority equity holders of such non-wholly owned subsidiaries became equity holders of Cardinal and such non-wholly owned subsidiaries became wholly owned subsidiaries of Cardinal NC. Subsequently, a newly formed merger subsidiary of Cardinal was merged with and into Cardinal NC so that the members of Cardinal NC became members of Cardinal and Cardinal NC became a wholly owned subsidiary of Cardinal.

As a result of the September 2025 Reorganization, the existing ownership interests of Cardinal NC were recapitalized from multiple classes (Class A, B and C units) into a single common class of LLC units. The minority equity holders of the non-wholly owned subsidiaries received newly issued LLC units in Cardinal in exchange for their subsidiary-level interests, which were cancelled. In the accompanying consolidated statement of changes in equity, the September 2025 Reorganization is reflected as: (i) the reclassification of the carrying amounts of previously reported noncontrolling interests in subsidiaries to members’ equity, and (ii) the recapitalization of the existing unit classes into a single class of LLC units, with no change in the total carrying amount of equity.

IPO Reorganization

On December 10, 2025, immediately prior to and in connection with the closing of the IPO, the Company completed the second step of the Reorganization Transactions (the “IPO Reorganization”). The IPO Reorganization consisted of the following:

•

The Company amended and restated the Cardinal operating agreement to, among other things, (i) recapitalize all existing ownership interests, (ii) appoint Cardinal Infrastructure Group Inc. as the sole managing member of Cardinal upon its acquisition of LLC units in connection with the IPO, and (iii) provide certain redemption rights to the Continuing Equity Holders.

•

Cardinal Infrastructure Group Inc. amended and restated its certificate of incorporation to, among other things, (i) reclassify all outstanding shares of common stock into 1,718,750 shares of Class A Common Stock, as adjusted for an approximately 86-to-one forward stock split, (ii) provide for Class A Common Stock and Class B Common Stock, each entitling the holder to one vote per share on all matters presented to stockholders, (iii) provide that shares of Class B Common Stock may only be held by the Continuing Equity Holders and their permitted transferees, and (iv) authorize 10,000,000 shares of preferred stock, par value $0.0001 per share, issuable by the Board of Directors in one or more series without stockholder approval.

•

Cardinal Infrastructure Group Inc. acquired newly issued LLC units from Cardinal using the net proceeds of the IPO and became the sole managing member of Cardinal.

•

Cardinal Infrastructure Group Inc. issued 23,387,813 shares of Class B Common Stock to the Continuing Equity Holders, on a one-for-one basis with their LLC units, for nominal consideration.

In the accompanying condensed consolidated statements of changes in stockholders'/members' equity, the IPO Reorganization is reflected as: (i) the conversion of members’ equity to the recapitalized equity structure of Cardinal Infrastructure Group Inc. (Class A Common Stock, Class B Common Stock, and additional paid-in capital), (ii) the receipt of net IPO proceeds in exchange for newly issued LLC units, (iii) the recognition of noncontrolling interests representing the Continuing Equity Holders’ 61.0% economic interest in Cardinal, and (iv) the establishment of Cardinal Infrastructure Group Inc. as a reporting entity with the accompanying reclassification of the predecessor equity accounts.

Both the September 2025 Reorganization and the IPO Reorganization are accounted for as transactions among entities under common control. As Cardinal Infrastructure Group Inc. had no substantive operations prior to the IPO and the Continuing Equity Holders retained their majority economic interest (61.0%) in Cardinal, the Transactions are treated as a recapitalization rather than a business combination.

The September 2025 Reorganization, in which the pre-existing minority equity holders of Cardinal NC’s non-wholly owned subsidiaries exchanged their subsidiary-level interests for LLC units of Cardinal, was accounted for as an acquisition of noncontrolling interests in accordance with Accounting Standards Codification ("ASC") 810-10-45-23, with the carrying amounts of noncontrolling interests reclassified to members’ equity with no gain or loss recognized.

The IPO Reorganization, in which Cardinal Infrastructure Group Inc. became the sole managing member of Cardinal and completed the IPO, was accounted for as a recapitalization of the predecessor operating entity. The accompanying consolidated financial statements represent a continuation of the historical financial statements of Cardinal, with the exception of the recapitalized equity structure. Comparative information for periods prior to the Transactions reflects the historical financial statements of Cardinal.

Basis of Accounting

The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The unaudited interim condensed consolidated financial statements include the results of the Company and its wholly owned or controlled subsidiaries. All significant intercompany transactions and balances have been eliminated during consolidation. In the opinion of management, the

condensed consolidated financial statements reflect all adjustments, which are necessary for the fair presentation of the financial condition, and results of operations for the interim periods presented.

The accompanying condensed consolidated financial statements were prepared in accordance with the requirements for interim financial information. Accordingly, these interim financial statements have not been audited and exclude certain disclosures required for annual financial statements. We have historically experienced, and in the future expect to continue to experience, variability in our results on a quarterly basis. Due to the seasonality of the Company's businesses, the operating results presented for interim periods are not necessarily indicative of the results that may be expected for any other interim period or for the entire year. These interim financial statements should be read in conjunction with the audited consolidated financial statements of the Company included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025.

Condensed Consolidated Statements of Changes in Stockholders'/Members' Equity (Unaudited) (Parenthetical)	3 Months Ended
	Mar. 31, 2026 USD ($)
Unrealized cash flow hedge losses, net of tax benefit	$ 45,795

Condensed Consolidated Statements of Changes in Stockholders'/Members' Equity (Unaudited) - USD ($)	Total	Members' Equity	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning Balance at Dec. 31, 2024	$ 23,353,976	$ 11,757,715						$ 11,596,261
Net income	6,641,745	5,476,981						1,164,764
Member distributions	(2,797,936)	(2,640,321)						(157,615)
Rollover equity issued in business combinations	2,800,000							2,800,000
Ending Balance at Mar. 31, 2025	29,997,785	$ 14,594,375						15,403,410
Beginning Balance at Dec. 31, 2025	139,537,823		$ 1,495	$ 2,339	$ 57,593,814	$ 863,593		81,076,582
Beginning Balance, Shares at Dec. 31, 2025			14,947,318	23,387,813
Net income	11,481,036					3,418,438		8,062,598
Unrealized cash flow hedge losses, net of tax benefit of $45,795	(526,177)						$ (158,259)	(367,918)
Realized cash flow hedge losses reclassified to net income	17,813						6,355	11,458
Restricted stock awards, net	191,852				191,852
Class A stock awards issued in consideration for ALGC Acquisition	8,489,557		$ 35		8,489,522
Class A stock awards issued in consideration for ALGC Acquisition, Shares			345,666
Class B equity issued in consideration for ALGC Acquisition	102,809,682			$ 418				102,809,264
Class B equity issued in consideration for ALGC Acquisition, Shares				4,186,062
Ending Balance at Mar. 31, 2026	$ 262,001,586		$ 1,530	$ 2,757	$ 66,275,188	$ 4,282,031	$ (151,904)	$ 191,591,984
Ending Balance, Shares at Mar. 31, 2026			15,292,984	27,573,875

Earnings Per Share- Schedule of Basic and Diluted Earnings Per Share of Common Stock (Details) - USD ($)

3 Months Ended

Mar. 31, 2026

Mar. 31, 2025

Numerator:

Net income attributable to Cardinal Infrastructure Group Inc., Basic and Diluted

$ 3,418,438

$ 5,476,981

Denominator:

Weighted average shares of common stock outstanding, Basic

^[1]

15,104,788

Dilutive effects of:

Unvested RSUs

21,891

Weighted average shares of common stock outstanding, Diluted

^[1]

15,126,679

Basic earnings per share

^[1]

$ 0.23

Diluted earnings per share

^[1]

$ 0.23

[1]	(1) Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period following the recapitalization transactions and IPO (see Note 14)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2026	Dec. 31, 2025
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A Common Stock
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	15,292,984	14,947,318
Common stock, shares outstanding	15,292,984	14,947,318
Class B Common Stock
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	27,573,875	23,387,813
Common stock, shares outstanding	27,573,875	23,387,813

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2026

Accounting Policies [Abstract]

Loss Provisions

Cash

Accounts Receivable, Net

Change in Accounting Estimate - Property and Equipment Depreciation Method

approximately $459,166 and $0.03 for the three months ended March 31, 2026. The fixed assets will be depreciated over their estimated remaining useful lives as follows:


Asset Group		Useful Lives
Office equipment and computers		3-5 years
Vehicles and trailers		5 years
Machinery and equipment		5-7 years
Leasehold improvements		15 years

Segment Information

Fair Value Measurements

Level 1 – Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date;

Derivatives

Equity-Based Compensation

Other Accounting Policies

Recently Adopted Accounting Standards

Recently Issued Accounting Standards Not Yet Adopted

adoption is permitted. The Company is currently evaluating the impact of ASU 2025‑09 on its condensed consolidated financial statements and related disclosures.

Related Party Transactions

3 Months Ended

Mar. 31, 2026

Related Party Transactions

16. Related Party Transactions

During the three months ended March 31, 2026 and 2025 the Company engaged in transactions with Envision Homes ("Envision"), which is a related party due to common control under a Company equity holder. The Company recognized $6,546 and $9,535 of sublease income for the three months ended March 31, 2026, and 2025, respectively. There were no outstanding balances due from Envision as of March 31, 2026 and March 31, 2025, respectively. All transactions with Envision were conducted in the normal course of business and on terms equivalent to those that prevail in arm's length transactions.

During the three months ended March 31, 2026 and 2025, the Company engaged in transactions with Wellfield Development ("Wellfield"), which is a related party due to common control under a Company equity holder. The Company recognized no revenue for the three months ended March 31, 2026 and 2025. The outstanding balances due from Wellfield as of March 31, 2026 and March 31, 2025 are $- and $14,422, respectively, which are included on the accompanying condensed consolidated balance sheets as accounts receivable, net. All transactions with Wellfield were conducted in the normal course of business and on terms equivalent to those that prevail in arm's length transactions.

During the three months ended March 31, 2026 and 2025, the Company engaged in transactions with Park Towns ("Park"), which is a related party due to common control under a Company equity holder. The Company recognized revenue of $14,471 and $38,857 for the work performed for Park for the three months ended March 31, 2026 and 2025, respectively. The outstanding balances due from Park as of March 31, 2026 and 2025 are $- and $215,738, respectively, which are included on the accompanying condensed consolidated balance sheet as accounts receivable, net. All transactions with Park were conducted in the normal course of business and on terms equivalent to those that prevail in arm's length transactions.

During the three months ended March 31, 2026 the Company engaged in transactions with the previously consolidated VIE, CCCRE Holdings ("CCCRE"), which is a related party due to common control under a Company equity holder. The Company recognized $33,804 of lease expense for the three months ended March 31, 2026 related to a leased office warehouse and equipment yard which began in November 2025. We expect to pay CCCRE $144,000 per year under the lease through November 2030. Management believes the terms of the lease are consistent with market rates and comparable to those that could have been obtained from an unrelated third party. In addition, the Company entered into a separate lease agreement with CCCRE with an initial term beginning January 1, 2026 and extending through January 31, 2041 with annual base rent of approximately $1,140,000. The commencement of this lease is contingent upon the issuance of a certificate of occupancy, which had not been received as of March 31, 2026. Accordingly, the lease had not commenced as of March 31, 2026.

In September 2025, the Company entered into a new lease with King Road, LLC ("King Road"), which is a related party due to common control under a Company equity holder. The Company recognized lease expense of $60,000 for the three months ended March 31, 2026 related to leased land for purposes of operating an equipment yard. We expect to pay King Road $120,000 per year through December 2030. Management believes the terms of the lease are consistent with market rates and comparable to those that could have been obtained from an unrelated third party.

In February 2026, as part of the ALGC transaction, the Company entered into two separate 15-year lease agreements with an entity under common control with the seller to lease the existing operating and office facilities of ALGC. The Company recognized lease expense of $75,560 for the three months ended March 31, 2026. We expect to pay $600,000 per year through February 2041 with 3% annual increases.

In connection with the IPO, Cardinal Infrastructure Group Inc. utilized some of the net proceeds from the IPO to redeem 7,500,000 OpCo units for $157,500,000 from the group of Continuing Equity Holders, which includes Erik West, the Chief Operating Officer of Cardinal NC, Mike Rowe, our Chief Financial Officer, and Jeremy Spivey, our Chief Executive Officer. Additionally we entered into a Tax Receivable Agreement (“TRA”) with the Continuing Equity Holders. The TRA provides for payments by the Company to the Continuing Equity Holders equal to 85% of certain tax benefits that the Company realizes, or is deemed to realize, as a result of increases in tax basis arising from exchanges of LLC units for Class A Common Stock (or cash) and from certain other tax benefits related to payments made under the TRA. The Company retains the benefit of the remaining 15% of such tax benefits. The TRA liability is recognized when the related tax benefits are realized upon exchanges of LLC units. As of March 31, 2026, the tax receivable agreement liability on the condensed consolidated balance sheet totaled $39,423,529 . Refer to Note 13. Income Taxes and Tax Receivable Agreement for further details.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

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+ Details

Leases

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Leases

8. Leases

The Company has both operating and finance leases, primarily related to construction and transportation equipment, as well as office and workshop space.

For operating leases, right-of-use assets and lease liabilities are recognized at the commencement date. Operating lease liabilities are measured at the present value of the lease payments over the lease term. Operating right-of-use assets are calculated as the present value of the lease payments plus initial direct costs, plus any prepayments less any lease incentives received. Lease terms may include renewal or extension options to the extent they are reasonably certain to be exercised. The assessment of whether renewal or extension options are reasonably certain to be exercised is made at lease commencement.

Factors considered in determining whether an option is reasonably certain of exercise include, but are not limited to, the value of any leasehold improvements, the value of renewal rates compared to market rates, and the presence of factors that would cause a significant economic penalty to the Company if the option were not exercised. Lease expense is recognized on a straight-line basis over the lease term.

The assets and liabilities under the finance leases are recorded at the present value of the future minimum lease payments. The assets are amortized over the lower of their related lease terms or their estimated useful lives. Following is a summary of equipment held under the finance leases at March 31, 2026, and December 31, 2025, respectively:


	March 31, 2026			December 31, 2025
Equipment	$	16,360,122		$	15,919,545
Accumulated depreciation		(10,218,141	)		(9,975,175	)
	$	6,141,981		$	5,944,370

Future minimum lease payments as of March 31, 2026 were as follows:


	Finance Leases			Operating Leases
2026	$	3,153,775		$	5,029,501
2027		3,353,543			6,563,206
2028		1,562,652			4,517,490
2029		894,592			2,550,382
2030		60,093			2,168,115
Thereafter		-			8,669,700
Total future undiscounted lease payments		9,024,655			29,498,394
Less: Imputed interest		(543,618	)		(6,787,381	)
Lease liabilities		8,481,037			22,711,013
Less: Current portion of lease liabilities		(3,487,722	)		(5,455,264	)
Long-term portion of lease liabilities	$	4,993,315		$	17,255,749

The components of lease costs are as follows:


	For the three months ended March 31, 2026		For the three months ended March 31, 2025
Amortization of finance lease assets	$	481,724	$	749,683
Interest in finance lease liabilities		81,051		113,048
Operating lease cost		1,346,761		897,253
Short-term lease costs		—		—
Total lease costs	$	1,909,536	$	1,759,984

The net change in ROU asset and operating lease liability is included in the net change in other assets in the condensed consolidated statements of cash flows. Other required information related to the Company’s lease obligations were as follows:


	For the three months ended March 31, 2026			For the three months ended March 31, 2025
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$	(538,528	)	$	(599,006	)
Operating cash flows from operating leases		(1,193,081	)		(917,626	)
Assets obtained in exchange for lease obligations (non-cash)
Property and equipment via finance leases		695,897			723,438
Right-of-use assets via operating leases		11,767,913			1,495,491

As of March 31, 2026 and March 31, 2025 the weighted-average discount rate for operating leases was 6.84% and 5.53%, respectively. The weighted-average remaining operating lease term as of March 31, 2026 and 2025, was 6.53 and 2.79 years, respectively. As of March 31, 2026 and March 31, 2025, the weighted-average discount rate for finance leases was 4.80% and 4.56%, respectively and the weighted-average remaining lease term was 2.44 years and 2.47 years, respectively.

In connection with the acquisition of ALGC (see Note 3 – Business Combinations), the Company assumed right-of-use assets and lease liabilities which have been included in the consolidated lease balances presented herein. A description of the leases and terms as well as the fair values of the right-of-use assets and lease liabilities recognized as of the acquisition date are disclosed in Note 3.

Certain of the Company's lease arrangements involve related parties. See Note 16 – Related Party Transactions for further details.

Subsequent Events

3 Months Ended

Mar. 31, 2026

Subsequent Events [Abstract]

Subsequent Events

17. Subsequent Events

The Company has evaluated subsequent events through the date on which this Form 10-Q was filed, the date on which these financial statements were issued. There have been no subsequent events that occurred during such period that would require disclosure in the Form 10-Q or would be required to be recognized in the condensed consolidated financial statements as of and for the three months ended March 31, 2026.

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 11,481,036	$ 6,641,745
Other comprehensive income (loss), net of tax:
Unrealized cash flow hedge (loss)	(526,177)
Realized cash flow hedge losses reclassified to net income	17,813
Other comprehensive (loss)	(508,364)
Comprehensive income	10,972,672	6,641,745
Less: comprehensive income attributable to noncontrolling interests	(7,706,138)	(1,164,764)
Comprehensive income attributable to Cardinal Infrastructure Group Inc.	$ 3,266,534	$ 5,476,981

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

Notes Payable & Credit Facility (Tables)

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Summary of Notes payable

Notes payable consisted of the following at March 31, 2026 and December 31, 2025, respectively:


	March 31, 2026		December 31, 2025
Note payable under the October 2025 Credit Facility, bearing interest based on the Secured Overnight Financing Rate (“SOFR”) plus 2.375%, with interest payable monthly and scheduled quarterly principal amortization, maturing October 31, 2030. In February 2026, the Company entered into the First Amendment to the Credit Agreement, which provided for an additional term loan advance of $80.0 million, increasing the aggregate outstanding principal balance from $120.0 million to $200.0 million. Quarterly principal installments of $2.5 million are due through September 30, 2027, $3.75 million from December 31, 2027 through September 30, 2030, with the remaining principal due as a final balloon payment on October 31, 2030. The effective interest rate, inclusive of the amortization of deferred financing costs, was 6.57% at March 31, 2026.	$	197,500,000	$	120,000,000
Unsecured subordinated notes payable to various sellers. Notes payable are due in (a) quarterly installments of $125,000 plus interest at 7% through September 2025, with $0 outstanding as of September 30, 2025 and (b) semi-annual payments of $25,422 including interest at 5% through July 2027 unless seller’s employment agreement is terminated without cause in which all principal and interest would be payable immediately. The effective interest rate was 5.00% at March 31, 2026		68,726		91,378
Note payable to a financial institution, bearing interest based on Compounded SOFR, calculated daily, with interest payable monthly and scheduled monthly principal amortization, maturing January 1, 2031. Monthly principal installments of $7,552 are due through December 1, 2030, with the remaining principal balance of $641,927 due as a final balloon payment on January 1, 2031. The effective interest rate was 6.20% at March 31, 2026.		1,064,844		1,087,500
Total Notes Payable		198,633,570		121,178,878
Less Current Portion		10,129,136		6,128,674
Less Unamortized Debt Issuance Costs		2,605,513		1,897,340
Long-Term Portion	$	185,898,921	$	113,152,864

Summary of Future Maturities of Notes Payable

Future maturities of notes payable are as follows as of March 31, 2026:


2026	$	7,583,163
2027		11,386,605
2028		15,090,625
2029		15,090,625
2030		148,840,625
Thereafter		641,927
	$	198,633,570

Income Taxes and Tax Receivable Agreement - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Feb. 18, 2026	Dec. 31, 2025
Income Tax Disclosure [Line Items]
Effective income tax rate, Percentage	8.40%
Pre-tax book income	$ 12,534,265	$ 6,641,745
Total tax expense	$ 1,053,229	$ 0
Tax receivable agreement ownership percentage	85.00%
Tax receivable agreement liability	$ 39,423,529			$ 39,423,529
Goodwill expected to be deductible for tax purposes, Amortization period	15 years
Tax Receivable Agreement
Income Tax Disclosure [Line Items]
Tax receivable agreement, Terms	Payments under the Tax Receivable Agreement are due within five (5) business days after delivery of the applicable schedule calculating the realized tax benefits and related payment amount, once such schedule becomes final in accordance with the Tax Receivable Agreement. The benefit schedule is required to be delivered within one hundred eighty (180) calendar days after the due date (including extensions) of the applicable annual federal income tax return for the relevant taxable year, and payments are based on the actual tax savings realized by PubCo. Substantially all payments due under the Tax Receivable Agreement are payable over fifteen years following the purchase of LLC interests from Continuing Equity Holders or redemption or exchanges by Continuing Equity Holder of LLC interests.
Tax Receivable Agreement \| AL Grading Contractors LLC
Income Tax Disclosure [Line Items]
Fair value of TRA and TBA liability			$ 15,300,000
Limited liability company units, issued			4,186,062

Notes Payable & Credit Facility - Summary of Future Maturities of Notes Payable (Details) - Notes Payable	Mar. 31, 2026 USD ($)
Debt Instrument [Line Items]
2026	$ 7,583,163
2027	11,386,605
2028	15,090,625
2029	15,090,625
2030	148,840,625
Thereafter	641,927
Future maturities of notes payable	$ 198,633,570

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

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+ Details

Equity and Noncontrolling Interest - Summary of Ownership of LLC Units of OpCo (Details) - OpCo - shares	Mar. 31, 2026	Dec. 31, 2025
Noncontrolling Interest [Line Items]
LLC Units	42,866,859	38,335,131
Ownership %	100.00%	100.00%
Cardinal Infrastructure Group Inc.
Noncontrolling Interest [Line Items]
LLC Units	15,292,984	14,947,318
Ownership %	35.68%	39.00%
Continuing Equity Holders
Noncontrolling Interest [Line Items]
LLC Units	27,573,875	23,387,813
Ownership %	64.32%	61.00%

Stock-Based Compensation

3 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

11. Stock-Based Compensation

2025 Stock Incentive Plan

Cardinal Infrastructure Group Inc. adopted the 2025 Stock Incentive Plan (the “2025 Plan”) on November 13, 2025, with stockholder approval on the same date. The 2025 Plan is designed to attract, retain, and motivate employees, officers, directors, and consultants by providing for equity‑based compensation aligned with long‑term stockholder value. It authorizes up to 3,660,656 shares of Class A common stock for issuance, with the share reserve eligible for an automatic annual increase of up to 5% of outstanding shares beginning with the first fiscal year after the Company’s registration date, unless the Compensation Committee elects otherwise. Shares underlying awards that are forfeited, canceled, expired, or settled in cash are returned to the plan.

The 2025 Plan may be used to grant stock options (both incentive and nonqualified), restricted stock, restricted stock units, stock appreciation rights, and other stock‑based awards. It is administered by the Board of Directors or a designated committee, which has broad authority to determine award terms, vesting conditions, performance goals, and to interpret the plan, including the ability to accelerate vesting in certain circumstances. The 2025 Plan includes a detailed definition of a Change in Control, covering specified acquisitions of voting power, board turnover, mergers, consolidations, and significant asset transactions. The plan will remain in effect until November 13, 2035, unless earlier terminated or extended.

In connection with the acquisition of ALGC (refer to Note 3), the Company issued 345,666 shares of Class A Common Stock, par value $0.0001 per share, from its 2025 Stock Incentive Plan to employees of, and service providers to, ALGC at the direction of the selling shareholders. The shares were fully vested at issuance and were not subject to any service or other vesting conditions. Because the shares were issued at the direction of the selling shareholders to settle existing arrangements with the recipients, they were treated as consideration transferred in the business combination rather than post-combination compensation expense. The shares were valued at $8,489,557, based on the Company's closing share price of $24.56 on the acquisition date.

As of March 31, 2026, in addition to the ALGC Class A awards, the December 2025 Director Stock Awards, and the 2026 Director Retainer awards discussed below were issued under the Plan. As of March 31, 2026 there were 3,276,757 shares of Class A common stock available for issuance under the plan.

December 2025 Director Stock Awards & 2026 Retainer Awards

In November 2025, the Board of Directors approved a Non-Employee Director Compensation Program under which directors receive annual cash retainers and equity grants pursuant to the 2025 Stock Incentive Plan. Each non-employee director is entitled to an annual cash retainer of $75,000 and an annual grant of restricted stock units (RSUs) with a grant date fair value of $100,000, generally awarded at the Company’s annual meeting and vesting on the earlier of the next annual meeting or the first anniversary of the grant date. Committee chairpersons receive an additional annual RSU grant valued at $12,500, and other committee members receive RSUs valued at $5,000 annually. Directors may elect to receive their cash retainer in the form of RSUs, which vest quarterly. In connection with the Company’s IPO, newly appointed directors received RSU grants with a fair value of $18,750 (in lieu of a prorated cash retainer for 2025), vesting on December 31, 2025, as well as RSUs valued at $100,000 plus applicable committee grants, each vesting on the first anniversary of the grant date.

Prior to the Non-Employee Director Compensation Program the directors elected to receive their 2025 cash retainer in the form of RSUs. As a result of this election, the Company recognized an additional grant of 12,404 RSU’s in the three months ended March 2025 and recognized $191,852 of stock-based compensation expense. The fair value of the restricted stock units was based on the Company’s closing share price on December 31, 2025 of $24.18 per share, which represents a Level 1 input under the fair value hierarchy.

As of March 31, 2026, the Company had $547,380 of unrecognized compensation cost related to 31,565 unvested awards, based on a weighted‑average grant‑date fair value of $21.93 per award. This amount is expected to be recognized over a weighted‑average period of 12 months, corresponding to the remaining service period through December 31, 2026.