Witkowski Mark R (CIK 1866738) reported 9 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-13). Recent activity: Sell CNM (1,685 shares), Buy CNM (18,372 shares), Sell CNM (478 shares), Sell CNM (937 shares), Buy CNM (100,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-13 | Core & Main, Inc. (CNM) | Chief Executive Officer | Sell | 1,685 | $82,835 |
| 2026-03-13 | Core & Main, Inc. (CNM) | Chief Executive Officer | Buy | 18,372 | $0 |
| 2026-03-11 | Core & Main, Inc. (CNM) | Chief Executive Officer | Sell | 478 | $23,881 |
| 2026-03-11 | Core & Main, Inc. (CNM) | Chief Executive Officer | Sell | 937 | $46,269 |
| 2025-08-20 | Core & Main, Inc. (CNM) | Chief Executive Officer | Buy | 100,000 | $0 |
| 2025-08-20 | Core & Main, Inc. (CNM) | Chief Executive Officer | Sell | 100,000 | $6.4M |
| 2025-07-21 | Core & Main, Inc. (CNM) | Chief Executive Officer | Buy | 100,000 | $0 |
| 2025-07-21 | Core & Main, Inc. (CNM) | Chief Executive Officer | Sell | 72,331 | $4.4M |
| 2025-07-21 | Core & Main, Inc. (CNM) | Chief Executive Officer | Sell | 27,669 | $1.7M |
Source: SEC Form 4 filings · as of 2026-03-13