William Marshall Mauney Jr. is President & VP at POWELL INDUSTRIES INC (POWL). They have made 5 open-market trades across 1 company since 2024, most recently 2026-10-01.
CIK 0002025220
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| POWL | 11,077 | $1.8M |
Shares reported on the most recent Form 4, priced at the 2026-10-02 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| POWL | SELL | 2026-09-30 | 2026-10-02 | $187.67 | $56K | -13.3% | — | — |
| POWL | SELL | 2026-05-11 | 2026-05-13 | $323.69 | $809K | -1.7% | -0.7% | -29.8% |
| POWL | SELL | 2025-12-19 | 2025-12-22 | $331.73 | $995K | +9.2% | +27.5% | -45.3% |
| POWL | SELL | 2024-12-04 | 2024-12-06 | $283.65 | $482K | -17.2% | -10.6% | -43.9% |
| POWL | SELL | 2024-08-15 | 2024-08-19 | $163.76 | $25K | -8.5% | +1.6% | +62.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.