| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
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General Counsel and Secretary
1 company
Mark G Whittenburg is General Counsel and Secretary at CNM. Mark G Whittenburg's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $383K at current prices.
Our model assigns Mark G Whittenburg a middling insider score of 51/100, based on 14 past trades. Over a 12-month horizon, 28.6% of those trades were profitable, with an average 12-month return of -31.9%.
The CNM filings lean toward selling, a net 374,816 shares.
Mark G Whittenburg has 20 Form 4 filings on record from March 2022 to March 2026, all as General Counsel and Secretary at Core & Main (CNM), 2022–2026.
The 78 reported transactions were 32 other transactions, 14 conversions, 14 open-market sales and 9 tax withholdings, plus smaller numbers of other types.
Counted by filing, the open-market trades come to no purchases and 11 sales worth about $16.9M.
The largest open-market sale was 50,000 shares of CNM at an average $60.03 on June 9, 2025, about $3.0M. Twelve months later CNM was down 11%.
5 of the 6 sales since April 2023 were made under a Rule 10b5-1 trading plan; the other was not.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 9, 2025 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell10b5-1 | 50,000 | $60.03 | $3,001,255.09 | -83.8% | +12.2% | -11.3% | |
| Jan 16, 2025 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell10b5-1 | 50,000 | $55.14 | $2,756,793.14 | -86.7% | -11.4% | +6.6% | |
| Jan 10, 2025 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell10b5-1 | 50,000 | $50.49 | $2,524,500.00 | -86.7% | -4.7% | +12.0% | |
| Apr 19, 2024 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell10b5-1 | 50,000 | $54.08 | $2,704,170.00 | -79.4% | -4.6% | -11.1% | |
| Mar 22, 2024 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell | 50,000 | $57.91 | $2,895,605.00 | -79.4% | -12.1% | -17.0% | |
| Apr 13, 2023 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell10b5-1 | 31,204 | $25.06 | $781,831.82 | -74.8% | +26.7% | +124.6% | |
| Mar 3, 2023 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell | 31,204 | $24.02 | $749,364.06 | -85.5% | +9.1% | +101.7% | |
| Feb 24, 2023 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell | 24,793 | $23.04 | $571,158.82 | -82.4% | +15.9% | +101.7% | |
| Feb 17, 2023 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell | 6,411 | $23.06 | $147,806.25 | -54.8% | +19.7% | +94.5% | |
| Sep 9, 2022 | CNM Core & Main, Inc. | General Counsel and Secretary | Sell | 19,729 | $24.78 | $488,892.51 | -78.9% | -14.5% | +22.0% |