Witkowski Mark R
SEC insider (Form 3/4/5 filer). CIK 0001866738. Chief Executive Officer at Core & Main, Inc. (CNM). 22 reported Form 4/5 transactions since Sep 2024; latest on Oct 16, 2026. Located in ST. LOUIS, MO.
Companies Witkowski Mark R has filed insider reports for
- Core & Main, Inc. (CNM): Director, Officer, Chief Executive Officer
Witkowski Mark R
CIK: 0001866738
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Core & Main, Inc.
Discretionary Trading P&L
Holdings
Transaction History (22 total)
- Oct 16, 2026CNM
Core & Main, Inc.
GiftDirect19.6K shares- - Mar 12, 2026CNM
Core & Main, Inc.
AwardDirect18.4K shares- - Mar 11, 2026CNM
Core & Main, Inc.
Tax PaymentDirect1.7K shares at avg. $49.16$83K - Mar 10, 2026CNM
Core & Main, Inc.
Tax PaymentDirect937 shares at avg. $49.38$46K - Mar 9, 2026CNM
Core & Main, Inc.
Tax PaymentDirect478 shares at avg. $49.96$24K - Aug 18, 2025CNM
Core & Main, Inc.
OtherDirectClass B Common Stock and Limited Partnership Interests
100K shares- - Aug 18, 2025CNM
Core & Main, Inc.
ConversionDirect100K shares- - Aug 18, 2025CNM
Core & Main, Inc.
SaleDirect100K shares at avg. $64.08$6.4M - Aug 18, 2025CNM
Core & Main, Inc.
OtherIndirectClass B Common Stock and Limited Partnership Interests
100K shares- - Jul 17, 2025CNM
Core & Main, Inc.
ConversionDirect100K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 16, 2026 | CNM Core & Main, Inc. | Gift | 19,596 | - | $0 | Direct |
| Mar 12, 2026 | CNM Core & Main, Inc. | Award | 18,372 | - | $0 | Direct |
| Mar 11, 2026 | CNM Core & Main, Inc. | Tax Payment | 1,685 | $49.16 | $82,835 | Direct |
| Mar 10, 2026 | CNM Core & Main, Inc. | Tax Payment | 937 | $49.38 | $46,269 | Direct |
| Mar 9, 2026 | CNM Core & Main, Inc. | Tax Payment | 478 | $49.96 | $23,881 | Direct |
| Aug 18, 2025 | CNM Core & Main, Inc. | Other Class B Common Stock and Limited Partnership Interests | 100,000 | - | - | Direct |
| Aug 18, 2025 | CNM Core & Main, Inc. | Conversion | 100,000 | - | - | Direct |
| Aug 18, 2025 | CNM Core & Main, Inc. | Sale | 100,000 | $64.08 | $6,408,210 | Direct |
| Aug 18, 2025 | CNM Core & Main, Inc. | Other Class B Common Stock and Limited Partnership Interests | 100,000 | - | - | Indirect |
| Jul 17, 2025 | CNM Core & Main, Inc. | Conversion | 100,000 | - | - | Direct |
1-10 of 22 transactions