Robyn L. Bradbury - 11 Mar 2026 Form 4 Insider Report for Core & Main, Inc. (CNM)

Role: Chief Financial Officer
Signature: /s/ Mark Whittenburg, as Attorney-in-Fact for Robyn L. Bradbury
Issuer symbol: CNM
Transactions as of: 11 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 13 Mar 2026, 19:24:12 UTC
Previous filing: 11 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Bradbury Robyn L	Chief Financial Officer	C/O CORE & MAIN, INC., 1830 CRAIG PARK COURT, ST. LOUIS	/s/ Mark Whittenburg, as Attorney-in-Fact for Robyn L. Bradbury	13 Mar 2026	0002060011

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CNM	Class A Common Stock	Tax liability		-404	-5%	$49.16^*	7,676	11 Mar 2026	Direct	F1
transaction	CNM	Class A Common Stock	Award		+4,824	+63%	$0.000000^*	12,500	12 Mar 2026	Direct	F2
holding	CNM	Class A Common Stock						22	11 Mar 2026	By LLC	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	CNM	Options (Rights to Buy)	Award		+34,488		$0.000000^*	34,488	12 Mar 2026	Class A Common Stock	34,488	$47.63	Direct	F4

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

Explanation of Responses:

Id	Content
F1	Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.
F2	Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.
F3	Represents securities held by Core & Main Management Feeder, LLC ("Management Feeder") in respect of common units ("Units") of Management Feeder held directly by the reporting person. Pursuant to the Fourth Amended and Restated LLC Agreement of Management Feeder, dated as of February 13, 2024, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for shares of Class A common stock, on a one-for-one basis.
F4	The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.