John J. Addington Wilson, the Chief Operating Officer of Rapid Micro Biosystems (NASDAQ: RPID), executed a sale of 9,603 shares of Class A Common Stock on March 11, 2026, a transaction that appears in a Form 4 filing with the Securities and Exchange Commission.
The shares were disposed of at a price of $4.3181 per share, producing a total transaction value of $41,466. According to the filing, the sale was made to satisfy tax obligations arising from the vesting of restricted stock units.
Following the transaction, Wilson is reported to directly own 316,762 shares of the company. The timing of the sale aligns with recent share-price movement: Rapid Micro Biosystems shares have fallen roughly 17 percent over the past week, trading at approximately $3.42 at the time of the disclosure.
Separately, Rapid Micro Biosystems released fourth-quarter 2025 financial results that showed mixed outcomes. The company reported revenue of $11.3 million for the quarter, outperforming analyst expectations of $9.83 million and representing a 37 percent increase compared with the prior year.
Despite the top-line beat, the company reported a net loss per share of $0.28, which was larger than analysts had anticipated at $0.225 per share. The earnings call accompanying the results underscored financial challenges, as evidenced by the greater-than-expected loss. Company management and analysts noted that while revenue growth was strong, the earnings outcome did not meet investor expectations.
These developments - the insider sale and the quarterly results - provide data points investors can use when assessing Rapid Micro Biosystems' near-term financial position. The Form 4 filing and the quarterly report together document recent executive transactions and operational results without providing new guidance on future performance.
Summary
Rapid Micro Biosystems' COO sold 9,603 shares for $41,466 on March 11, 2026 to cover tax liabilities tied to RSU vesting. The company reported Q4 2025 revenue that exceeded analyst estimates but posted a wider-than-expected net loss per share.