William Mariner Greenman, who serves as President and Chief Executive Officer of Cerus Corporation (NASDAQ: CERS), reported an insider transaction involving the sale of company stock in a Form 4 filed with the Securities and Exchange Commission.
Transaction details
According to the filing, Greenman sold 78,187 shares of common stock on March 6, 2026. The shares were disposed of at a price of $2.0055 per share, yielding a total proceeds figure of $156,804. The filing states that the sale was executed automatically to satisfy statutory tax withholding obligations and to cover brokerage fees connected with the vesting of restricted stock units.
In a related filing dated March 5, 2026, Greenman acquired 193,270 shares of Cerus common stock at no cost. Taking both filings into account, Greenman now directly owns 5,446,250 shares of Cerus Corporation.
Market context
The insider activity coincides with recent share-price movement for Cerus. The stock is reported to be trading at $1.93, reflecting roughly a 9% decline over the previous week. Longer-term performance shows a different trend: shares have risen approximately 64% over the last six months.
Separately, company financials released for the fourth quarter of 2025 show revenue of $233.8 million, representing a 16% increase versus the comparable period a year earlier. Reported earnings per share for the quarter stood at -$0.01, which met consensus expectations. The company also reported a 54% gross profit margin.
Notes for investors
The Form 4 filings indicate that the March 6 sale was a mechanized transaction tied to restricted stock vesting rather than an open-market decision intended to alter a personal holding strategy. The March 5 no-cost issuance and subsequent automatic sale are recorded sequentially in the filings and together determine Greenman’s current direct ownership level.
Investors tracking insider activity and company financials can use these filings and the reported quarterly results to update ownership tables and evaluate recent operating performance. The reported revenue growth and gross margin appear in the company’s disclosed quarterly metrics, while the EPS figure indicates reported profitability per share for Q4 2025.