BlackRock Inc. (NYSE: CNM) reports 10.1% ownership of Core & Main Class A

Rhea-AI Filing Summary

BlackRock, Inc. reported beneficial ownership of 18,990,291 shares of CORE & MAIN INC Class A, representing 10.1% of the class as disclosed on the Schedule 13G/A amendment. The filing lists sole voting power over 18,450,856 shares and sole dispositive power over 18,990,291 shares. The amendment was signed by Spencer Fleming on 04/07/2026.

Key Figures

Beneficially owned: 18,990,291 shares Percent of class: 10.1% Sole voting power: 18,450,856 shares +2 more

5 metrics

Beneficially owned 18,990,291 shares Amount beneficially owned reported on Schedule 13G/A

Percent of class 10.1% Percent of Class A stock beneficially owned

Sole voting power 18,450,856 shares Shares with sole power to vote reported in Item 4(c)(i)

Sole dispositive power 18,990,291 shares Shares with sole power to dispose reported in Item 4(c)(iii)

Filing signature date 04/07/2026 Date signature block was executed

Key Terms

Schedule 13G/A, Beneficial ownership, Sole voting power, Dispositive power

4 terms

Schedule 13G/A regulatory

"In accordance with SEC Release No. 34-39538 (January 12, 1998), this reflects the securities beneficially owned"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership financial

"Item 4. | Ownership (a) | Amount beneficially owned: 18990291"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole voting power corporate governance

"(i) Sole power to vote or to direct the vote: 18450856"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Dispositive power corporate governance

"(iii) Sole power to dispose or to direct the disposition of: 18990291"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

CORE & MAIN INC CLASS A

(Name of Issuer)

Class A Stock

(Title of Class of Securities)

21874C102

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 21874C102

1

Names of Reporting Persons

BlackRock, Inc.

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 18,450,856.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 18,990,291.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

18,990,291.00

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)

10.1 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CORE & MAIN INC CLASS A
(b)	Address of issuer's principal executive offices: 1830 CRAIG PARK COURT ST. LOUIS MO 63146
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Class A Stock
(e)	CUSIP No.:
Item 4.	Ownership
(a)	Amount beneficially owned: 18990291
(b)	Percent of class: 10.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 18450856
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 18990291
	(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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of CORE & MAIN INC CLASS A. No one person's interest in the common stock of CORE & MAIN INC CLASS A is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	04/07/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

What stake does BlackRock report in CORE & MAIN (CNM)?

BlackRock reports beneficial ownership of 18,990,291 shares, equal to 10.1% of CORE & MAIN Class A common stock as shown on the Schedule 13G/A amendment.

How much voting power does BlackRock hold in CNM?

The filing states BlackRock has sole voting power over 18,450,856 shares. It reports 0 shares of shared voting power in this Schedule 13G/A amendment.

When was the Schedule 13G/A signed and who signed it?

The amendment was signed by Spencer Fleming, Managing Director on 04/07/2026, as provided in the signature block of the Schedule 13G/A filing.

Does the filing identify other parties with >5% interest in CNM?

The filing states various persons may have rights to dividends or sale proceeds but specifies no single other person holds more than 5% of the outstanding Class A shares.