Mauney William Marshall JR Insider Trading Activity
Mauney William Marshall JR has been net-selling over the last 12 months with 0 purchases and 8 sales across 1 company.
POWL is the most-traded position with 8 trades. The largest single transaction was a sale of POWL for $995K on Dec 19, 2025.
Performance Scorecard
Forward stock performance after each transaction by Mauney William Marshall JR. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | — | +24.0% | 100% | 8 |
| 90 days | — | +47.2% | 100% | 1 |
| 120 days | — | +27.2% | 100% | 1 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersPOWL · POWELL INDUSTRIES INC
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
May 11, 2026 | POWL | Sell | 927 | $321.86 | $298K | −6.9% | President | |
May 11, 2026 | POWL | Sell | 386 | $322.70 | $125K | −3.1% | President | |
May 11, 2026 | POWL | Sell | 176 | $323.82 | $57K | −1.5% | President | |
May 11, 2026 | POWL | Sell | 313 | $324.87 | $102K | −2.6% | President | |
May 11, 2026 | POWL | Sell | 623 | $325.97 | $203K | −5.4% | President | |
May 11, 2026 | POWL | Sell | 66 | $327.06 | $22K | −0.6% | President | |
May 11, 2026 | POWL | Sell | 9 | $327.69 | $3K | −0.1% | President | |
Dec 19, 2025 | POWL | Sell | 3,000 | $331.73 | $995K | −40.3% | President |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| POWL | POWELL INDUSTRIES INC | 8 | $1.8M |
Other insiders at POWELL INDUSTRIES INC
5 other tracked filers at POWL.