Summary
Updated Aug 31, 2026
William Mariner Greenman is President and CEO of CERUS CORP (CERS). 4 SEC Form 4 filings on record, most recently on 2 July 2026. Most recent open-market trade: sold $300K of CERS on 2 July 2026. Lifetime open-market sales: $1.20M.
Recent Transactions
6Every recent SEC Form 4 transaction William Mariner Greenman has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William Mariner Greenman go back to 2026: 4 primary Form 4 filings, an average of 4.0 per year. 6 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies William Mariner Greenman files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Vivek K. Jayaraman - $619K of CERS open-market activity in the last 12 months
- Chrystal Jensen - $504K of CERS open-market activity in the last 12 months
- Kevin Dennis Green - $480K of CERS open-market activity in the last 12 months
- Richard J. Benjamin - $420K of CERS open-market activity in the last 12 months
- Eric Bjerkholt - $53K of CERS open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is William Mariner Greenman?
William Mariner Greenman is a corporate insider, tracked as President and CEO of CERUS CORP (CERS). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has William Mariner Greenman submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has William Mariner Greenman been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($1.20M) across all tracked filings.
Where can I see all of William Mariner Greenman's SEC 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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