John Birchall
John Birchall: Managing Director at Powell Industries. What John Birchall 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)
John Birchall holds 19,502 Powell Industries shares (0.05% of the company), worth about $3.7M at the last price, according to the Form 4 of Oct 1, 2026.
- Shares held: 19,502 (0.05%), $3.7M — Held in their own name.
Declarations
- Powell Industries (POWL) — Form 4 of Oct 1, 2026 (Managing Director): shares withheld for tax of 599 at $187.67; grant or award of 400 at $181.67; 19,502 shares after 0000080420-26-000125
- Powell Industries (POWL) — Form 4 of Feb 9, 2026 (Managing Director): open-market sale of 7,200 at $194.17; 19,701 shares after 0000080420-26-000021
- Powell Industries (POWL) — Form 4 of Dec 1, 2025 (Managing Director): grant or award of 7,200 at $105.01; 26,901 shares after 0000080420-25-000160
- Powell Industries (POWL) — Form 4 of Oct 1, 2025 (Managing Director): shares withheld for tax of 1,299 at $100.43; grant or award of 900 at $95.73; 19,701 shares after 0000080420-25-000126
- Powell Industries (POWL) — Form 4 of Aug 26, 2025 (Managing Director): open-market sale of 9,000 at $86.68; 20,100 shares after 0000080420-25-000107
- Powell Industries (POWL) — Form 4 of Dec 4, 2024 (Managing Director): grant or award of 6,300 at $90.49; open-market sale of 5,100 at $96.67; 24,300 shares after 0000080420-24-000091
- Powell Industries (POWL) — Form 4/A of Dec 2, 2024 (Managing Director): other of 5,100 at $96.67; other of 300 at $90.49; 29,100 shares after 0000080420-24-000094
- Powell Industries (POWL) — Form 4 of Oct 1, 2024 (Managing Director): shares withheld for tax of 2,298 at $73.70; grant or award of 1,200 at $60.71; 23,100 shares after 0000080420-24-000074
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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