Wilson John J. Addington 4

What Happened

• John J. Addington, Chief Operating Officer of Rapid Micro Biosystems (RPID), disposed of 4,610 shares on Feb 9, 2026 in an open market/private sale at $3.78 per share, generating proceeds of $17,438.
• Footnote F1 indicates this was an automatic sale to cover tax obligations tied to the vesting of restricted stock units (RSUs), i.e., tax-withholding rather than an independent decision to sell.

Key Details

• Transaction date: 2026-02-09; filing date: 2026-02-10 (filed promptly).
• Shares sold: 4,610 at $3.78 per share; total proceeds ≈ $17,438.
• Transaction code: S (Sale). Method noted as open market or private sale.
• Footnote F1: automatic sale to cover taxes on RSU vesting.
• Footnote F2: filing notes inclusion of 29,904 shares acquired under the company ESPP on Mar 14, 2025 (listed as part of holdings disclosure).
• Shares owned after the transaction are not specified in the summary data provided.

Context

• Tax-withholding sales upon RSU vesting are routine and are executed to satisfy tax liabilities; they do not necessarily indicate the officer is reducing broader exposure.
• The sale amount (~$17.4K) is relatively small; purchases (when they occur) typically carry more weight for interpreting insider sentiment.