Insider · CIK 0002025220
William Marshall Mauney Jr
Files at POWL (POWELL INDUSTRIES INC). First filing Dec 6, 2024, latest Oct 2, 2026.
In brief
William Marshall Mauney Jr files SEC Form 4 as officer at POWL (POWELL INDUSTRIES INC). Since Dec 6, 2024, William Marshall Mauney Jr has reported 0 open-market buys worth $0 and 4 open-market sells worth $2.1M, the latest filed on Oct 2, 2026.
A track record needs three past buys with six months of prices behind them; William Marshall Mauney Jr has 0, so none is measured yet.
The newest scored trade: sold $56k of POWL on Sep 30, 2026, filed Oct 2, 2026, scored 30 (weak). In the last 12 months: 0 buys worth $0 and 3 sells worth $1.9M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
POWL: POWELL INDUSTRIES INC
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 30Weak | POWELL INDUSTRIES INC | $56k 301 shares | -3% | +96% from low-43% from high | |
| 57Moderate | POWELL INDUSTRIES INC | $809k 2,500 shares | -19% | +471% from low0% from high | |
| 58Moderate | POWELL INDUSTRIES INC | $995k 3,000 shares | -40% | +115% from low-18% from high | |
| 49Moderate | POWELL INDUSTRIES INC | $284k 1,000 shares | -16% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| May 11, 2026 | POWL POWELL INDUSTRIES INC | 2,500 0.01% of outstanding | $788k | May 11, 2026 | none |
| Dec 19, 2025 | POWL POWELL INDUSTRIES INC | 3,000 0.02% of outstanding | $1.0M | Dec 19, 2025 | none |
Transactions
Every row this insider has filed, 16 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -301 | $187.67 | $56k | 10,552 | 12 d ago |
| Oct 1, 2026 | POWL POWELL INDUSTRIES INC | AGrant or award Common Stock | +525 | $181.67 | $95k | 11,077 | 12 d ago |
| May 11, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -927 | $321.86 | $298k | 12,426 | May 13, 2026 |
| May 11, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -386 | $322.70 | $125k | 12,040 | May 13, 2026 |
| May 11, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -176 | $323.82 | $57k | 11,864 | May 13, 2026 |
| May 11, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -313 | $324.87 | $102k | 11,551 | May 13, 2026 |
| May 11, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -623 | $325.97 | $203k | 10,928 | May 13, 2026 |
| May 11, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -66 | $327.06 | $22k | 10,862 | May 13, 2026 |
| May 11, 2026 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -9 | $327.69 | $2,949 | 10,853 | May 13, 2026 |
| Dec 19, 2025 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -3,000 | $331.73 | $995k | 4,451 | Dec 22, 2025 |
| Dec 1, 2025 | POWL POWELL INDUSTRIES INC | AGrant or award Common Stock | +3,000 | $315.03 | $945k | 7,451 | Dec 3, 2025 |
| Sep 30, 2025 | POWL POWELL INDUSTRIES INC | FTax withholding Common Stock | -466 | $301.28 | $140k | 4,151 | Oct 1, 2025 |
| Oct 1, 2025 | POWL POWELL INDUSTRIES INC | AGrant or award Common Stock | +300 | $287.18 | $86k | 4,451 | Oct 1, 2025 |
| Sep 5, 2025 | POWL POWELL INDUSTRIES INC | FTax withholding Common Stock | -770 | $266.80 | $205k | 4,617 | Sep 9, 2025 |
| Dec 4, 2024 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -700 | $282.91 | $198k | 5,687 | Dec 6, 2024 |
| Dec 4, 2024 | POWL POWELL INDUSTRIES INC | SOpen-market sale Common Stock | -300 | $287.08 | $86k | 5,387 | Dec 6, 2024 |
Questions about William Marshall Mauney Jr
Answered from the filings on this page, as of the latest one.
Is William Marshall Mauney Jr buying or selling?
In the last 12 months William Marshall Mauney Jr reported 0 open-market buys worth $0 and 3 open-market sells worth $1.9M on SEC Form 4; the latest was sold $56k of POWL on Sep 30, 2026. Grants, option exercises and tax withholding are not counted.
How did William Marshall Mauney Jr's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and William Marshall Mauney Jr has 0.
Where does William Marshall Mauney Jr file Form 4?
William Marshall Mauney Jr has filed Form 4 at POWL (POWELL INDUSTRIES INC) as Vice President, R&D. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.