William Marshall Mauney Jr insider trades: Powell Industries (POWL) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where William reports to the SEC
Open-market buys and sales
5 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | POWL | ↓ Sell | 301 | $187.67 | $56K | Direct | Oct 2, 2026 (2d) |
| May 11, 2026 | POWL | ↓ Sell | 2,500 | $323.69 | $809K | Direct | May 13, 2026 (2d) |
| Dec 19, 2025 | POWL | ↓ Sell | 3,000 | $331.73 | $995K | Direct | Dec 22, 2025 (3d) |
| Dec 4, 2024 | POWL | ↓ Sell | 1,000 | $284.16 | $284K | Direct | Dec 6, 2024 (2d) |
| Aug 15, 2024 | POWL | ↓ Sell | 150 | $163.76 | $25K | Direct | Aug 19, 2024 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other POWL insiders
Open-market trades in the last 12 months
About William Marshall Mauney Jr's insider trades
William Marshall Mauney Jr is Vice President, R&D at Powell Industries (POWL). Since Aug 15, 2024, William has reported no open-market purchases and 5 sales worth $2.2M on SEC Form 4. In the last 12 months: 3 sales ($1.9M).
Their filings also include grants and awards (4 filings), shares withheld for taxes (4 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 POWL insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.