Officer reports sale of 21,976 Class A shares

CNM reported an officer sale under Form 144.

Rhea-AI Filing Summary

CNM reported an officer sale under Form 144. The filing discloses the sale of 21,976 Class A shares on 05/27/2026 generating $1,088,326.62. The filing also lists two option-derived Class A lots of 8,627 and 10,187 shares associated with 05/29/2026.

Key Figures

Shares sold: 21,976 shares Proceeds: $1,088,326.62 Option-derived lot: 8,627 shares +2 more

5 metrics

Shares sold 21,976 shares sale dated 05/27/2026

Proceeds $1,088,326.62 cash proceeds from 21,976-share sale on 05/27/2026

Option-derived lot 8,627 shares Option granted 03/11/2022; listed 05/29/2026

Option-derived lot 10,187 shares Option granted 03/10/2023; listed 05/29/2026

Form type Form 144 Notice of proposed sale of securities

Key Terms

Form 144, Option Granted, Class A

3 terms

Form 144 regulatory

"Securities Sold During The Past 3 Months — 21976 sale entry"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Option Granted financial

"Option Granted - 03/11/2022 (8,627) and 03/10/2023 (10,187)"

Class A market

"Class A | 05/29/2026 | Option Granted entries"

Class A denotes a specific group of a company’s shares that carry a particular set of rights—most commonly different voting power or dividend priority compared with other share classes. Think of it like different seats on a bus where some seats let you steer and others only ride: knowing whether a share is Class A tells investors how much influence they have over company decisions and how returns might be distributed, which affects control and value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does CNM's Form 144 report about recent insider activity?

The filing reports an officer sale of 21,976 Class A shares on 05/27/2026. It lists proceeds of $1,088,326.62 and additional option-derived lots of 8,627 and 10,187 tied to 05/29/2026.

Who is the seller named in the CNM Form 144 filing?

The filing names Mark Whittenburg with an address in St. Louis as the person associated with the sale of 21,976 Class A shares on 05/27/2026, per the excerpt.

How much cash did CNM's reported sale generate according to the Form 144?

The reported proceeds for the 21,976 Class A shares sold on 05/27/2026 are $1,088,326.62, as shown in the filing excerpt. Other listed lots show share counts but not separate proceeds.

What additional securities are listed for sale in the filing for CNM?

The filing lists two option-derived Class A lots associated with 05/29/2026: 8,627 shares (option granted 03/11/2022) and 10,187 shares (option granted 03/10/2023), with "Cash" indicated as method.

On which exchange are the Class A shares referenced in the CNM filing listed?

The excerpt indicates the securities are listed on NYSE, shown alongside the Class A entries and the 05/29/2026 dates in the filing metadata.

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

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Accepted by SEC EDGAR 05/29/2026 - 10:01 AM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001866737
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Core & Main, Inc.
SEC File Number	001-40650
Address of Issuer	1830 CRAIG PARK COURT ST. LOUIS MISSOURI 63146
Phone	314-432-4700
Name of Person for Whose Account the Securities are To Be Sold	Whittenburg Mark G
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Former Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	18814	931293.00	188072306	05/29/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	05/29/2026	Option Granted - 03/11/2022	Issuer			8627	05/29/2026	Cash
Class A	05/29/2026	Option Granted - 03/10/2023	Issuer			10187	05/29/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Mark Whittenburg 1830 Craig Park Court St. Louis MO 63146	Class A	05/27/2026	21976	1088326.62

144: Remarks and Signature

Remarks
Date of Notice	05/29/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Emily Navaro, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark Whittenburg.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)