Michael Bruce Rowe Jr. - 09 Dec 2025 Form 4 Insider Report for Cardinal Infrastructure Group Inc.

Role: Chief Financial Officer
Signature: /s/ Tiffany Gidley, Attorney-in-fact
Issuer symbol: CDNL on Nasdaq
Transactions as of: 09 Dec 2025
Net transactions value: -$13,887,489
Form type: 4
Filing time: 11 Dec 2025, 17:55:15 UTC
Next filing: 10 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Rowe Michael Bruce Jr.	Chief Financial Officer	C/O CARDINAL INFRASTRUCTURE GROUP INC., 100 E. SIX FORKS ROAD, #300, RALEIGH	/s/ Tiffany Gidley, Attorney-in-fact	11 Dec 2025	0002091833

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CDNL	Class B Common Stock	Award		+2,429,624			2,429,624	09 Dec 2025	Direct	F1
transaction	CDNL	Class B Common Stock	Disposed to Issuer		-595,238	-24%		1,834,386	11 Dec 2025	Direct	F2
transaction	CDNL	Class B Common Stock	Award		+269,688			269,688	09 Dec 2025	By The Rowe Family Irrevocable Trust dated March 13, 2024	F1, F3
transaction	CDNL	Class B Common Stock	Disposed to Issuer		-66,071	-24%		203,617	11 Dec 2025	By The Rowe Family Irrevocable Trust dated March 13, 2024	F2, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CDNL	LLC Units	Award		+2,429,624			2,429,624	09 Dec 2025	Class A Common Stock	2,429,624		Direct	F1, F4
transaction	CDNL	LLC Units	Disposed to Issuer	$12,499,998	-595,238	-24%	$21.00	1,834,386	11 Dec 2025	Class A Common Stock	595,238		Direct	F4
transaction	CDNL	LLC Units	Award		+269,688			269,688	09 Dec 2025	Class A Common Stock	269,688		By The Rowe Family Irrevocable Trust dated March 13, 2024	F1, F3, F4
transaction	CDNL	LLC Units	Disposed to Issuer	$1,387,491	-66,071	-24%	$21.00	203,617	11 Dec 2025	Class A Common Stock	66,071		By The Rowe Family Irrevocable Trust dated March 13, 2024	F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents securities received as part of the Issuer's reorganization in connection with its initial public offering, as described in the registration statement on Form S-1 relating to the initial public offering. These securities were previously reported on a Form 3 filed by the Reporting Person.
F2	Reflects the cancellation for no consideration of Class B Common Stock in connection with the redemption of the membership units of Cardinal Civil Contracting Holdings LLC (the "LLC Units").
F3	The Reporting Person is the spouse of the trustee of The Rowe Family Irrevocable Trust dated March 13, 2024 ("Rowe Trust"), and as a result, may be deemed to share beneficial ownership of the securities held of record by Rowe Trust.
F4	The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.