Mark R. Witkowski - 16 Oct 2026 Form 4 Insider Report for Core & Main, Inc. (CNM)

Reporting relationship
Chief Executive Officer, Director
Issuer ticker
CNM
Reported as of
16 Oct 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
4
Accepted by SEC
20 Oct 2026, 17:22:37 UTC
Prior SEC filing
13 Mar 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Jackie Burkhardt, as Attorney-in-Fact for Mark R. Witkowski
Filing notes and source

Key filing fact

Mark R. Witkowski filed Form 4 for Core & Main, Inc. (CNM) on 20 Oct 2026.

Key facts

  • This page summarizes Mark R. Witkowski's Form 4 filing for Core & Main, Inc. (CNM).
  • 1 reported transaction and 0 derivative rows are listed below.
  • Accepted by SEC: 20 Oct 2026, 17:22.

Change

  • Previous filing in this sequence was filed on 13 Mar 2026.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001866738 Primary reporting owner

Witkowski Mark R

Relationship
Chief Executive Officer, Director
Address
C/O CORE & MAIN, INC., 1830 CRAIG PARK COURT, ST. LOUIS
Signature
/s/ Jackie Burkhardt, as Attorney-in-Fact for Mark R. Witkowski
Signature date
20 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CNM transaction

Class A Common Stock

Gift

Transaction value
Shares
-19,596
Change %
-38%
Price
$0.000000*
Shares after
31,523
Date
16 Oct 2026
Ownership
Direct
Footnotes
F1
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The reporting person transferred these shares to an irrevocable trust of which he is not a trustee or a beneficiary.

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