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WG
Insider

William Mariner Greenman

President and CEO

William Mariner Greenman (President and CEO) filed 3 Form 4 reports in the trailing twelve months (0 purchases, 3 sales), most often in Cerus Corporation (CERS). The largest single filing was $743K of CERS (447,757 sh × $1.66, as filed), executed Mar 12.

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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
3
0 buys · 3 sells
Median delay
execution → disclosure
Volume, ttmiDollar value disclosed in the trailing twelve months
$1.2M
shares × price, as filed
Last traded
Jun 30
Filed Jul 2

Median ADV $7.8M across their filed names

Open performance
Volume by month
$900K$450K$0Oct 2024Apr 2025Oct 2025Apr 2026Mar 2025 · sells $281KMar 2026 · sells $900KJul 2026 · sells $300K
Buys $0 Sells $1.5M

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

Sectors filed on
Healthcare 3 filings

Sector per market data · by filing · past 12 months

Most traded names
CERS Cerus Corporation CERS · 0 buys · 4 sells 4 filings
Recent filings
CERSSALE Cerus Corporation View filing → $300K
101,919 sh × $2.94
Exec Jun 30
Filed Jul 2 · 7:13 PM ET
CERSSALE Cerus Corporation View filing → $743K
447,757 sh × $1.66
Exec Mar 12
Filed Mar 16 · 5:30 PM ET
CERSSALE Cerus Corporation View filing → $157K
78,187 sh × $2.01
Exec Mar 6
Filed Mar 9 · 5:30 PM ET
CERSSALE Cerus Corporation View filing → $281K
193,913 sh across 2 lots
Exec Mar 13 2025
Filed Mar 17 2025 · 5:30 PM ET