William Spencer Marshall
Co-Founder and CEO at Planet Labs PBC
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Planet Labs PBC, 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Planet Labs PBC July 10, 202594.9%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 18, 2026 | Planet Labs PBC | Gift | −80,000 | — | — |
| Sep 15, 2026 | Planet Labs PBC | Shares withheld for tax | −134,642 | $16.02 | $2,156,965 |
| Jul 10, 2026 | Planet Labs PBC | Open-market sale | −200,000 | $25.92 | $5,184,000 |
| Jun 15, 2026 | Planet Labs PBC | Shares withheld for tax | −134,641 | $30.58 | $4,117,322 |
| Apr 22, 2026 | Planet Labs PBC | Gift | −155,000 | — | — |
| Apr 6, 2026 | Planet Labs PBC | Open-market sale | −200,000 | $35.07 | $7,014,000 |
| Mar 19, 2026 | Planet Labs PBC | Grant or award | +77,744 | — | — |
| Mar 19, 2026 | Planet Labs PBC | Shares withheld for tax | −39,572 | $26.96 | $1,066,861 |
| Mar 15, 2026 | Planet Labs PBC | Shares withheld for tax | −122,167 | $24.79 | $3,028,520 |
| Mar 12, 2026 | Planet Labs PBC | Grant or award | +393,212 | — | — |
| Feb 3, 2026 | Planet Labs PBC | Option exercise | +123,900 | — | — |
| Feb 3, 2026 | Planet Labs PBC | Shares withheld for tax | −63,041 | $23.95 | $1,509,832 |
| Jan 21, 2026 | Planet Labs PBC | Option exercise | +123,897 | — | — |
| Jan 21, 2026 | Planet Labs PBC | Shares withheld for tax | −63,039 | $26.38 | $1,662,969 |
| Jan 13, 2026 | Planet Labs PBC | Option exercise | +247,794 | — | — |
Questions about William Spencer Marshall
What boards is William Spencer Marshall on?
William Spencer Marshall sits on the board of Planet Labs PBC.
What company is William Spencer Marshall the CEO of?
William Spencer Marshall is Co-Founder and CEO of Planet Labs PBC.
How long has William Spencer Marshall served on boards?
Our records show at least 4 years of board service across 1 board, the earliest from 2023.
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