Mark R. Witkowski serves as Executive at Core & Main, Inc., where they oversee executive responsibilities. Since joining the company, Mark R. Witkowski has executed 19 insider transactions totaling $16.0M, demonstrating a bearish approach to their equity position. Their most recent transaction on Aug 18, 2025 involved exercising options for 100,000 shares valued at $0.
Mark R. Witkowski currently holds 135,847 shares of Core & Main, Inc. (CNM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark R. Witkowski has been a net seller of CNM stock. They have purchased $0 and sold $16.0M worth of shares.
Mark R. Witkowski's most recent insider trade was on Aug 18, 2025, when they sold 100,000 shares at $0.00 per share.
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| $64.08 |
| Discretionary |
| May 8, 2024 | CNM | $0 | Conversion | 50,000 | $N/A | Planned |
| May 8, 2024 | CNM | $3.0M | Sale | 50,000 | $59.50 | Planned |
| Apr 8, 2024 | CNM | $0 | Conversion | 50,000 | $N/A | Planned |
| Apr 8, 2024 | CNM | $2.9M | Sale | 50,000 | $58.51 | Planned |
| Mar 7, 2024 | CNM | $0 | Award | 4,677 | $N/A | Discretionary |
| Nov 15, 2023 | CNM | $0 | Conversion | 40,000 | $N/A | Planned |
| Nov 15, 2023 | CNM | $1.4M | Sale | 40,000 | $34.01 | Planned |
| Nov 9, 2023 | CNM | $0 | Conversion | 20,000 | $N/A | Planned |
| Nov 9, 2023 | CNM | $642.0K | Sale | 20,000 | $32.10 | Planned |
| Oct 4, 2023 | CNM | $0 | Conversion | 20,000 | $N/A | Planned |
| Oct 4, 2023 | CNM | $600.4K | Sale | 20,000 | $30.02 | Planned |
| Sep 25, 2023 | CNM | $0 | Other | 603 | $N/A | Planned |
| Sep 25, 2023 | CNM | $0 | Other | 603 | $N/A | Planned |
| Sep 25, 2023 | CNM | $0 | Conversion | 39,397 | $N/A | Planned |
| Sep 25, 2023 | CNM | $1.1M | Sale | 40,000 | $28.44 | Planned |
| Mar 10, 2023 | CNM | $0 | Award | 9,669 | $N/A | Discretionary |
| Mar 11, 2022 | CNM | $0 | Award | 9,552 | $N/A | Discretionary |