William Marshall Mauney Jr.
William Marshall Mauney Jr.: Vice President, R&D at Powell Industries. What William Marshall Mauney Jr. holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Powell Industries (POWL)
William Marshall Mauney Jr. holds 11,077 Powell Industries shares (0.03% of the company), worth about $2.1M at the last price, according to the Form 4 of Oct 1, 2026.
- Shares held: 11,077 (0.03%), $2.1M — Held in their own name.
Declarations
- Powell Industries (POWL) — Form 4 of Oct 1, 2026 (Vice President, R&D): open-market sale of 301 at $187.67; grant or award of 525 at $181.67; 11,077 shares after 0000080420-26-000131
- Powell Industries (POWL) — Form 4 of May 11, 2026 (Vice President, R&D): open-market sale of 927 at $321.86; open-market sale of 386 at $322.70; 10,853 shares after 0000080420-26-000072
- Powell Industries (POWL) — Form 4 of Dec 19, 2025 (Vice President, R&D): open-market sale of 9,000 at $110.58; 13,353 shares after 0000080420-25-000169
- Powell Industries (POWL) — Form 4 of Dec 1, 2025 (Vice President, R&D): grant or award of 9,000 at $105.01; 22,353 shares after 0000080420-25-000163
- Powell Industries (POWL) — Form 4 of Oct 1, 2025 (Vice President, R&D): shares withheld for tax of 1,398 at $100.43; grant or award of 900 at $95.73; 13,353 shares after 0000080420-25-000128
- Powell Industries (POWL) — Form 4 of Sep 5, 2025 (Vice President, R&D): shares withheld for tax of 2,310 at $88.93; 13,851 shares after 0000080420-25-000111
- Powell Industries (POWL) — Form 4 of Dec 4, 2024 (Vice President, R&D): open-market sale of 2,100 at $94.30; open-market sale of 900 at $95.69; 16,161 shares after 0000080420-24-000095
- Powell Industries (POWL) — Form 4 of Oct 1, 2024 (Vice President, R&D): shares withheld for tax of 1,299 at $73.70; grant or award of 1,200 at $60.71; 19,161 shares after 0000080420-24-000072
- Powell Industries (POWL) — Form 4 of Sep 6, 2024 (Vice President, R&D): shares withheld for tax of 2,310; 19,260 shares after 0000080420-24-000066
- Powell Industries (POWL) — Form 4 of Aug 15, 2024 (Vice President, R&D): open-market sale of 450 at $54.59; 21,570 shares after 0000080420-24-000062
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.
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