Updated Jul 16, 2026
Marshall William Spencer has filed 3 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $19.17M.
William Spencer Marshall is a co-founder and the CEO of Planet Labs PBC, an Earth-imaging company that provides daily satellite imagery to help organizations make informed decisions. Under his leadership, Planet Labs has grown to become a significant player in the space imaging industry.
| Role | Insider |
|---|---|
| Notability | 50/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-14 | PL | Planet Labs PBC | S — Open-market sale [10b5-1] | 200.0K | $25.92 | $5.18M |
| 2026-06-17 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 134.6K | $30.58 | $4.12M |
| 2026-04-24 | PL | Planet Labs PBC | G — Bona-fide gift | 155.0K | $0.00 | |
| 2026-04-08 | PL | Planet Labs PBC | S — Open-market sale [10b5-1] | 200.0K | $35.07 | $7.01M |
| 2026-03-23 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 39.6K | $26.96 | $1.07M |
| 2026-03-23 | PL | Planet Labs PBC | A — Grant or award | 77.7K | $0.00 | |
| 2026-03-16 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 122.2K | $24.79 | $3.03M |
| 2026-03-16 | PL | Planet Labs PBC | A — Grant or award | 393.2K | $0.00 | |
| 2026-02-05 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 63.0K | $23.95 | $1.51M |
| 2026-02-05 | PL | Planet Labs PBC | M — Option exercise | 123.9K | $0.00 | |
| 2026-01-23 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 63.0K | $26.38 | $1.66M |
| 2026-01-23 | PL | Planet Labs PBC | M — Option exercise | 123.9K | $0.00 | |
| 2026-01-15 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 120.5K | $25.32 | $3.05M |
| 2026-01-15 | PL | Planet Labs PBC | M — Option exercise | 247.8K | $0.00 | |
| 2025-12-30 | PL | Planet Labs PBC | S — Open-market sale [10b5-1] | 200.0K | $19.36 | $3.87M |
| 2025-12-16 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 121.9K | $18.05 | $2.20M |
| 2025-10-13 | PL | Planet Labs PBC | S — Open-market sale | 200.0K | $15.50 | $3.10M |
| 2025-09-15 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 121.9K | $9.86 | $1.20M |
| 2025-09-15 | PL | Planet Labs PBC | F — Tax withholding / forfeiture | 18.6K | $9.86 | $183K |
| 2025-09-15 | PL | Planet Labs PBC | A — Grant or award | 36.6K | — |
William Spencer Marshall is a co-founder and the CEO of Planet Labs PBC, an Earth-imaging company that provides daily satellite imagery to help organizations make informed decisions. Under his leadership, Planet Labs has grown to become a significant player in the space imaging industry.…
3 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 4 open-market sales ($19.17M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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