RPID (Rapid Micro Biosystems, Inc. Class A Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by RPID officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-24 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | M | — | — |
| 2026-07-24 | Richard S Kollender | Director | M | — | — |
| 2026-06-02 | Kirk Malloy | Director | A | — | — |
| 2026-06-02 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | A | — | — |
| 2026-06-02 | MELINDA LITHERLAND PEI | Director | A | — | — |
| 2026-06-02 | INESE LOWENSTEIN | Director | A | — | — |
| 2026-06-02 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | A | — | — |
| 2026-05-26 | Dafni Bika | Director | A | — | — |
| 2026-05-26 | Kirk Malloy | Director | A | — | — |
| 2026-05-26 | Richard S Kollender | Director | A | — | — |
| 2026-05-26 | INESE LOWENSTEIN | Director | A | — | — |
| 2026-05-26 | MELINDA LITHERLAND PEI | Director | A | — | — |
| 2026-05-22 | Bain Capital Life Sciences Partners, LP | 10%+ Owner | Buy | — | — |
| 2026-03-12 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | Sell | — | — |
| 2026-03-12 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | Sell | — | — |
| 2026-03-12 | John J. Addington Wilson | CHIEF OPERATING OFFICER | Sell | — | — |
| 2026-03-02 | NATALE S RICCIARDI | Director | M | — | — |
| 2026-02-20 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | Sell | — | — |
| 2026-02-20 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | Sell | — | — |
| 2026-02-20 | John J. Addington Wilson | CHIEF OPERATING OFFICER | Sell | — | — |
| 2026-02-13 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | A | — | — |
| 2026-02-13 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | A | — | — |
| 2026-02-13 | John J. Addington Wilson | CHIEF OPERATING OFFICER | A | — | — |
| 2026-02-10 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | Sell | — | — |
| 2026-02-10 | John J. Addington Wilson | CHIEF OPERATING OFFICER | Sell | — | — |
| 2026-02-10 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | Sell | — | — |
| 2026-02-06 | Longitude Capital Partners II, LLC | 10%+ Owner | Sell | — | — |
| 2026-02-03 | Longitude Capital Partners II, LLC | 10%+ Owner | MIXED | — | — |
| 2025-11-18 | Kirk Malloy | Director | G | — | — |
| 2025-10-21 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | MIXED | — | — |
| 2025-07-15 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | MIXED | — | — |
| 2025-07-10 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | MIXED | — | — |
| 2025-05-27 | Richard S Kollender | Director | A | — | — |
| 2025-05-27 | Kirk Malloy | Director | A | — | — |
| 2025-05-27 | NATALE S RICCIARDI | Director | A | — | — |
| 2025-05-27 | MELINDA LITHERLAND PEI | Director | A | — | — |
| 2025-05-27 | INESE LOWENSTEIN | Director | A | — | — |
| 2025-05-27 | Dafni Bika | Director | A | — | — |
| 2025-03-11 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | F | — | — |
| 2025-03-11 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | F | — | — |
| 2025-03-11 | John J. Addington Wilson | CHIEF OPERATING OFFICER | F | — | — |
| 2025-02-20 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | A | — | — |
| 2025-02-20 | John J. Addington Wilson | CHIEF OPERATING OFFICER | A | — | — |
| 2025-02-20 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | A | — | — |
| 2025-02-13 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | F | — | — |
| 2025-02-13 | John J. Addington Wilson | CHIEF OPERATING OFFICER | F | — | — |
| 2025-02-13 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | F | — | — |
| 2025-02-07 | SEAN M WIRTJES | CHIEF FINANCIAL OFFICER | F | — | — |
| 2025-02-07 | Robert G. Spignesi Jr. | PRESIDENT AND CEO | F | — | — |
| 2025-02-07 | John J. Addington Wilson | CHIEF OPERATING OFFICER | F | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 8,448,860 | — |
| — | 10%+ Owner | 8,434,560 | — |
| — | 10%+ Owner | 8,334,560 | — |
| — | 10%+ Owner | 4,029,245 | — |
| — | Director | 3,422,252 | — |
| — | 10%+ Owner | 2,875,092 | — |
| — | 10%+ Owner | 2,783,606 | — |
| — | 10%+ Owner | 1,991,263 | — |
| — | Director | 1,614,835 | — |
| — | PRESIDENT AND CEO | 1,191,973 | — |
| — | CHIEF FINANCIAL OFFICER | 568,981 | — |
| — | CHIEF OPERATING OFFICER | 316,762 | — |
| — | 10%+ Owner | 294,990 | — |
| — | 10%+ Owner | 150,000 | — |
| — | SVP, GENERAL COUNSEL | 128,698 | — |
| — | CHIEF HUMAN RESOURCES OFFICER | 112,608 | — |
| — | Director | 100,687 | — |
| — | Director | 70,687 | — |
| — | Director | 70,687 | — |
| — | CHIEF COMMERCIAL OFFICER | 43,750 | — |
| — | Director | 29,442 | — |
| — | Director | 19,300 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the RPID quote page; the site-wide leaderboard is on the insider transactions hub.