Mark G. Whittenburg serves as Executive at Core & Main, Inc., where they oversee executive responsibilities. Since joining the company, Mark G. Whittenburg has executed 26 insider transactions totaling $8.6M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 31, 2025 involved gifting 25,500 shares valued at $0.
Mark G. Whittenburg currently holds 227,312 shares of Core & Main, Inc. (CNM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark G. Whittenburg has been a net seller of CNM stock. They have purchased $0 and sold $8.6M worth of shares.
Mark G. Whittenburg's most recent insider trade was on Dec 31, 2025, when they sold 25,500 shares at $0.00 per share.
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| $54.08 |
| Planned |
| Apr 19, 2024 | CNM | $0 | Conversion | 50,000 | $N/A | Planned |
| Mar 22, 2024 | CNM | $0 | Other | 60 | $N/A | Discretionary |
| Mar 22, 2024 | CNM | $0 | Other | 60 | $N/A | Discretionary |
| Mar 22, 2024 | CNM | $2.9M | Sale | 50,000 | $57.91 | Discretionary |
| Mar 22, 2024 | CNM | $0 | Conversion | 49,940 | $N/A | Discretionary |
| Mar 7, 2024 | CNM | $0 | Award | 2,421 | $N/A | Discretionary |
| Apr 13, 2023 | CNM | $0 | Conversion | 31,204 | $N/A | Planned |
| Apr 13, 2023 | CNM | $782.0K | Sale | 31,204 | $25.06 | Planned |
| Mar 10, 2023 | CNM | $0 | Award | 5,226 | $N/A | Discretionary |
| Mar 3, 2023 | CNM | $749.5K | Sale | 31,204 | $24.02 | Discretionary |
| Mar 3, 2023 | CNM | $0 | Conversion | 31,204 | $N/A | Discretionary |
| Feb 24, 2023 | CNM | $571.2K | Sale | 24,793 | $23.04 | Discretionary |
| Feb 24, 2023 | CNM | $0 | Conversion | 24,793 | $N/A | Discretionary |
| Feb 17, 2023 | CNM | $147.8K | Sale | 6,411 | $23.06 | Discretionary |
| Feb 17, 2023 | CNM | $0 | Conversion | 6,411 | $N/A | Discretionary |
| Sep 9, 2022 | CNM | $488.9K | Sale | 19,729 | $24.78 | Discretionary |
| Sep 9, 2022 | CNM | $0 | Conversion | 19,729 | $N/A | Discretionary |
| Aug 18, 2022 | CNM | $0 | Conversion | 5,296 | $N/A | Discretionary |
| Aug 18, 2022 | CNM | $131.2K | Sale | 5,296 | $24.78 | Discretionary |
| Aug 16, 2022 | CNM | $0 | Conversion | 5,876 | $N/A | Discretionary |
| Aug 16, 2022 | CNM | $153.2K | Sale | 6,179 | $24.79 | Discretionary |
| Aug 16, 2022 | CNM | $0 | Other | 303 | $N/A | Discretionary |
| Aug 16, 2022 | CNM | $0 | Other | 303 | $N/A | Discretionary |
| Mar 11, 2022 | CNM | $0 | Award | 5,286 | $N/A | Discretionary |