[Form 4] Core & Main, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Buck Robert M reported acquisition or exercise transactions in this Form 4 filing.

Core & Main, Inc. director Robert M. Buck reported an award of 2,799 restricted stock units as director compensation. These units vest on the earlier of one year from the grant date or the company’s next annual shareholder meeting to be held in 2027, contingent on his continued board service. Following this grant, his reported direct holdings total 15,849 shares of Class A common stock, including the awarded units once settled.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Buck Robert M

Role null

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	2,799	$0.00	--

Holdings After Transaction: Class A Common Stock — 15,849 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSUs granted: 2,799 units Holdings after transaction: 15,849 shares Vesting horizon: 2027

3 metrics

RSUs granted 2,799 units Restricted stock units granted as director compensation

Holdings after transaction 15,849 shares Direct Class A common stock holdings following award

Vesting horizon 2027 Vest by earlier of one year from grant or 2027 annual meeting

Key Terms

restricted stock units, director compensation, annual meeting of shareholders

3 terms

restricted stock units financial

"Represents restricted stock units granted as director compensation."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

director compensation financial

"Represents restricted stock units granted as director compensation."

annual meeting of shareholders regulatory

"the Issuer's next annual meeting of shareholders to be held in 2027"

A yearly gathering where a company’s owners (shareholders) vote on key items like electing the board, approving executive pay, and ratifying auditors, and receive updates on performance and strategy. Think of it as an annual town hall for owners: it matters to investors because outcomes and disclosures can affect leadership, corporate direction, dividend and governance policies, and therefore the company’s risk and potential return.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/24/2026 - 08:01 PM Accepted by SEC EDGAR 06/24/2026 - 08:01 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^*

Buck Robert M

(Last) (First) (Middle)

C/O CORE & MAIN, INC.

1830 CRAIG PARK COURT

(Street)

ST. LOUIS MISSOURI 63146

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Core & Main, Inc. [ CNM ]

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)
06/23/2026

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	06/23/2026		A		2,799(1)	A	$0	15,849	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. Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Remarks:

	/s/ Jackie Burkhardt, as Attorney-in-Fact for Robert M. Buck	06/24/2026
	** 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)

FAQ

What insider transaction did Core & Main (CNM) report for Robert M. Buck?

Core & Main reported that director Robert M. Buck received 2,799 restricted stock units as director compensation. These units will convert into Class A common shares after vesting, increasing his equity-based stake in the company once settlement occurs after the vesting date.

How many Core & Main (CNM) shares does Robert M. Buck hold after this award?

After the reported award, Robert M. Buck’s direct holdings are 15,849 shares of Core & Main Class A common stock. This figure reflects his position following the 2,799 restricted stock units grant, which will be settled in shares once the vesting conditions are satisfied.

When do Robert M. Buck’s new Core & Main (CNM) restricted stock units vest?

The 2,799 restricted stock units vest on the earlier of one year from the grant date or Core & Main’s next annual shareholder meeting in 2027. Vesting is conditioned on his continued service as a director through that applicable vesting date for the award.

What type of equity award did Core & Main (CNM) grant to director Robert M. Buck?

Core & Main granted Robert M. Buck restricted stock units as director compensation. The award consists of 2,799 units that will be settled in shares of Class A common stock after vesting, aligning his compensation with long-term shareholder interests via equity ownership.

Are Robert M. Buck’s new Core & Main (CNM) units tied to continued board service?

Yes. The footnote specifies that the restricted stock units vest only if Robert M. Buck continues serving as a director. Vesting occurs upon the earlier of one year after grant or the 2027 annual shareholder meeting, making continued board service a key condition for settlement.