[Form 4] Cardinal Infrastructure Group Inc. Insider Trading Activity

Zelman Ivy reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Zelman Ivy reported acquisition or exercise transactions in this Form 4 filing.

Cardinal Infrastructure Group Inc. director Zelman Ivy received a grant of Class A Common Stock in the form of 3,101 restricted stock units on May 7, 2026. These RSUs are part of equity compensation rather than an open‑market purchase.

According to the filing, 775 RSUs vested immediately, with 775 scheduled to vest on June 30, 2026, another 775 on September 30, 2026, and 776 on December 31, 2026, all contingent on continued service. After this grant, Ivy directly holds 18,427 shares of the company’s Class A Common Stock.

Insider Trade Summary

Grant/Award: 3,101 shares

Grant/Award 1 txn

Insider Zelman Ivy

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	3,101	$24.18	$75K

Holdings After Transaction: Class A Common Stock — 18,427 shares (Direct)

Footnotes (1)

1. F1. These shares represent restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest as follows, subject to the Reporting Person's continued service through each applicable vesting date: (i) 775 RSUs vested immediately upon execution of the award agreement; (ii) 775 RSUs will vest on June 30, 2026; (iii) 775 RSUs will vest on September 30, 2026; and (iv) 776 RSUs will vest on December 31, 2026.

Key Figures

RSU grant size: 3,101 shares Reported price per share: $24.18/share Holdings after grant: 18,427 shares +4 more

7 metrics

RSU grant size 3,101 shares Restricted stock units granted on May 7, 2026

Reported price per share $24.18/share Transaction price per share for the RSU grant

Holdings after grant 18,427 shares Total Class A Common Stock directly held by Ivy after transaction

Immediate vesting tranche 775 RSUs Vested immediately upon execution of award agreement

June 30, 2026 vesting 775 RSUs Scheduled vesting on June 30, 2026, subject to continued service

September 30, 2026 vesting 775 RSUs Scheduled vesting on September 30, 2026, subject to continued service

December 31, 2026 vesting 776 RSUs Final vesting tranche on December 31, 2026, subject to continued service

Key Terms

restricted stock units ("RSUs"), vesting, Class A Common Stock

3 terms

restricted stock units ("RSUs") financial

"These shares represent restricted stock units ("RSUs") granted on May 7, 2026."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

vesting financial

"The RSUs vest as follows, subject to the Reporting Person's continued service through each applicable vesting date."

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

Class A Common Stock financial

"security_title: "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/11/2026 - 05:00 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Zelman Ivy

(Last) (First) (Middle)

C/O CARDINAL INFRASTRUCTURE GROUP INC.

100 E. SIX FORKS ROAD, #300

(Street)

RALEIGH NORTH CAROLINA 27609

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Cardinal Infrastructure Group Inc. [ CDNL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	05/07/2026		A		3,101	A	$24.18(1)	18,427	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares represent restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest as follows, subject to the Reporting Person's continued service through each applicable vesting date: (i) 775 RSUs vested immediately upon execution of the award agreement; (ii) 775 RSUs will vest on June 30, 2026; (iii) 775 RSUs will vest on September 30, 2026; and (iv) 776 RSUs will vest on December 31, 2026.

	/s/ Tiffany Gidley, Attorney-in-Fact	05/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)