5.1% Cardinal Infrastructure stake disclosed by McKinney (CDNL)

Rhea-AI Filing Summary

Mark McKinney reported a 5.1% beneficial ownership stake in Cardinal Infrastructure Group Inc. Class A common stock. As of December 31, 2025, he beneficially owned 760,438 shares with sole voting and dispositive power. The percentage is based on 14,947,318 shares outstanding as of the same date.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

CARDINAL INFRASTRUCTURE GROUP INC.

(Name of Issuer)

Class A Common Stock, par value $0.0001 per share

(Title of Class of Securities)

14154A102

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 14154A102

1

Names of Reporting Persons

Mark McKinney

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 760,438.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 760,438.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

760,438.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: Based on 14,947,318 shares outstanding as of December 31, 2025.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CARDINAL INFRASTRUCTURE GROUP INC.
(b)	Address of issuer's principal executive offices: 100 E. SIX FORKS RD., SUITE 300, RALEIGH, NC. 27609
Item 2.
(a)	Name of person filing: Mark McKinney
(b)	Address or principal business office or, if none, residence: c/o Cardinal Infrastructure Group Inc. 100 E. Six Forks Rd. Suite 300 Raleigh, NC. 27609
(c)	Citizenship: United States of America.
(d)	Title of class of securities: Class A Common Stock, par value $0.0001 per share
(e)	CUSIP No.: 14154A102
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: As of December 31, 2025, the Reporting Persons beneficially owned 760,438 shares of the Issuer's Class A Common Stock
(b)	Percent of class: The 760,438 shares of the Issuer's Class A Common Stock beneficially owned by the Reporting Persons constituted 5.1% of the total number of shares of Class A Common Stock issued and outstanding as of December 31, 2025.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 760,438
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 760,438
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Mark McKinney

Signature:	/s/ Mark McKinney
Name/Title:	Mark McKinney
Date:	02/17/2026

FAQ

What ownership stake in CDNL did Mark McKinney report on Schedule 13G?

Mark McKinney reported beneficial ownership of 5.1% of Cardinal Infrastructure Group Inc. (CDNL) Class A common stock. This represents 760,438 shares based on 14,947,318 shares outstanding as of December 31, 2025.

How many CDNL shares does Mark McKinney have voting control over?

Mark McKinney has sole voting power over 760,438 shares of Cardinal Infrastructure Group Inc. He reported no shared voting power, meaning all reported voting authority relates to shares he controls alone as of December 31, 2025.

What percentage of CDNL’s Class A common stock is owned by Mark McKinney?

Mark McKinney’s holdings represent 5.1% of Cardinal Infrastructure Group Inc.’s Class A common stock. This percentage is calculated from his 760,438 shares relative to 14,947,318 shares outstanding as of December 31, 2025.

Does Mark McKinney share dispositive power over any CDNL shares?

No. The filing states McKinney has sole dispositive power over 760,438 shares of Cardinal Infrastructure Group Inc. and no shared dispositive power. Sole dispositive power means he alone can decide whether and when to sell those shares.

What type of security in CDNL is covered by Mark McKinney’s filing?

The filing covers Class A common stock, par value $0.0001 per share, of Cardinal Infrastructure Group Inc. This is the company’s primary equity security class identified by CUSIP 14154A102 in the ownership disclosure.

As of what date are Mark McKinney’s CDNL ownership figures reported?

All ownership figures in the Schedule 13G are reported as of December 31, 2025. On that date, McKinney beneficially owned 760,438 shares, representing 5.1% of Cardinal Infrastructure Group Inc.’s 14,947,318 outstanding Class A shares.