Mark R Witkowski insider trades: Core & Main (CNM) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Mark reports to the SEC
Open-market buys and sales
8 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 18, 2025 | CNM | ↓ Sell | 100,000 | $64.08 | $6.4M | Direct | Aug 20, 2025 (2d) |
| Jul 17, 2025 | CNM | ↓ Sell | 100,000 | $61.26 | $6.1M | Direct | Jul 21, 2025 (4d) |
| May 8, 2024 | CNM | ↓ Sell | 50,000 | $59.50 | $3.0M | Direct | May 10, 2024 (2d) |
| Apr 8, 2024 | CNM | ↓ Sell | 50,000 | $58.51 | $2.9M | Direct | Apr 10, 2024 (2d) |
| Nov 15, 2023 | CNM | ↓ Sell | 40,000 | $34.01 | $1.4M | Direct | Nov 17, 2023 (2d) |
| Nov 9, 2023 | CNM | ↓ Sell | 20,000 | $32.10 | $642K | Direct | Nov 13, 2023 (4d) |
| Oct 4, 2023 | CNM | ↓ Sell | 20,000 | $30.02 | $600K | Direct | Oct 6, 2023 (2d) |
| Sep 25, 2023 | CNM | ↓ Sell | 40,000 | $28.44 | $1.1M | Direct | Sep 27, 2023 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other CNM insiders
Open-market trades in the last 12 months
About Mark R Witkowski's insider trades
Mark R Witkowski is Chief Executive Officer at Core & Main (CNM). Since Sep 25, 2023, Mark has reported no open-market purchases and 8 sales worth $22.2M on SEC Form 4. There have been no open-market trades in the last 12 months.
Their filings also include other transactions (8 filings), conversions (8 filings), grants and awards (5 filings), shares withheld for taxes (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every CNM insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.