William Spencer Marshall

Co-Founder and CEO

William Spencer Marshall (Co-Founder and CEO) filed 4 Form 4 reports in the trailing twelve months (0 purchases, 4 sales), most often in Planet Labs PBC (PL). The largest single filing was $7.0M of PL (200,000 sh × $35.07, as filed), executed Apr 6.

Add to watchlist

Return, ttmiAverage return per filing, trailing twelve months

–

no purchases on file

Delay-adjustediThe same average, entered at disclosure dates

–

returns measure stock purchases only

Filings, ttm

0 buys · 4 sells

Median delay

–

execution → disclosure

Volume, ttmiDollar value disclosed in the trailing twelve months

$19.2M

shares × price, as filed

Last traded

Jul 10

Filed Jul 13

Median ADV $260.0M across their filed names

Open performance→

Volume by month

Buys $0 Sells $19.2M

Shares × price, as filed · by filing month · past 24 months

Sectors filed on

Industrials 4 filings

Sector per market data · by filing · past 12 months

Most traded names

Planet Labs PBC PL · 0 buys · 4 sells 4 filings

Recent filings

PLSALE Planet Labs PBC View filing → $5.2M
200,000 sh × $25.92
Exec Jul 10
Filed Jul 13 · 8:23 PM ET PLSALE Planet Labs PBC View filing → $7.0M
200,000 sh × $35.07
Exec Apr 6
Filed Apr 8 · 5:30 PM ET PLSALE Planet Labs PBC View filing → $3.9M
200,000 sh × $19.36
Exec Dec 26 2025
Filed Dec 30 2025 · 5:30 PM ET PLSALE Planet Labs PBC View filing → $3.1M
200,000 sh × $15.50
Exec Oct 13 2025
Filed Oct 15 2025 · 5:30 PM ET