Whittenburg Mark G 4
4 · Core & Main, Inc. · Filed Mar 11, 2026
Research Summary
AI-generated summary of this filing
Core & Main (CNM) GC Mark Whittenburg Withholds Shares for Taxes
What Happened
- Mark G. Whittenburg, General Counsel and Secretary of Core & Main, had a total of 835 shares withheld to cover taxes when a portion of his restricted stock units (RSUs) vested. The filing shows 278 shares withheld on 2026-03-09 at $49.96 ($13,889) and 557 shares withheld on 2026-03-10 at $49.38 ($27,505), for a combined value of $41,394. These are dispositions recorded as tax withholding (code F), not open-market sales.
Key Details
- Transaction dates and prices:
- 2026-03-09: 278 shares withheld @ $49.96 — $13,889
- 2026-03-10: 557 shares withheld @ $49.38 — $27,505
- Total shares withheld: 835; total value: $41,394.
- Shares owned after the transaction: not specified in this Form 4.
- Footnote: F1 — shares were withheld by the issuer to satisfy tax withholding upon RSU vesting.
- Filing: Report filed 2026-03-11 (timely for Form 4 reporting).
Context
- This was a routine, compensation-related tax withholding (code F), not a discretionary sale. Withheld shares are commonly surrendered to the company to cover tax obligations upon RSU vesting and do not necessarily signal the insider’s view of the company’s stock.
Insider Transaction Report
Form 4
Whittenburg Mark G
General Counsel and Secretary
Transactions
- Tax Payment
Class A Common Stock
[F1]2026-03-09$49.96/sh−278$13,889→ 9,413 total - Tax Payment
Class A Common Stock
[F1]2026-03-10$49.38/sh−557$27,505→ 8,856 total
Footnotes (1)
- [F1]Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.
Signature
/s/ Mark Whittenburg|2026-03-11