RAPID MICRO BIOSYSTEMS, INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Malloy Kirk | — | Gift | 40,000 | — | — | 28,600 | Nov 14, 2025 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Option Exercise | 3,400 | $0.75 | $2,550 | 973,950 | Oct 17, 2025 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Sale | 11,881 | $3.32 | $39,445 | 970,550 | Jul 11, 2025 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Option Exercise | 25,144 | — | — | 897,510 | Jul 9, 2025 |
| LOWENSTEIN INESE | — | Award / Grant | 14,300 | — | — | 38,600 | May 22, 2025 |
| PEI MELINDA LITHERLAND | — | Award / Grant | 14,300 | — | — | 68,600 | May 22, 2025 |
| Kollender Richard S | — | Award / Grant | 14,300 | — | — | 111,018 | May 22, 2025 |
| Malloy Kirk | — | Award / Grant | 14,300 | — | — | 78,600 | May 22, 2025 |
| RICCIARDI NATALE S | — | Award / Grant | 14,300 | — | — | 28,600 | May 22, 2025 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Tax Withholding | 10,650 | $2.39 | $25,454 | 872,366 | Mar 9, 2025 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Tax Withholding | 7,690 | $2.39 | $18,379 | 489,955 | Mar 9, 2025 |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | Tax Withholding | 9,872 | $2.39 | $23,594 | 232,474 | Mar 9, 2025 |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | Award / Grant | 44,000 | — | — | 242,346 | Feb 18, 2025 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Award / Grant | 160,000 | — | — | 497,645 | Feb 18, 2025 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Award / Grant | 365,000 | — | — | 883,016 | Feb 18, 2025 |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | Tax Withholding | 7,075 | $2.68 | $18,961 | 198,346 | Feb 11, 2025 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Tax Withholding | 4,621 | $2.68 | $12,384 | 337,645 | Feb 11, 2025 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Tax Withholding | 10,755 | $2.68 | $28,823 | 516,205 | Feb 11, 2025 |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | Tax Withholding | 4,505 | $3.10 | $13,966 | 205,421 | Feb 6, 2025 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Tax Withholding | 5,891 | $3.10 | $18,262 | 342,266 | Feb 6, 2025 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Tax Withholding | 13,052 | $3.10 | $40,461 | 526,960 | Feb 6, 2025 |
| PEI MELINDA LITHERLAND | — | Purchase | 10,880 | $1.00 | $10,880 | 45,180 | Dec 5, 2024 |
| PEI MELINDA LITHERLAND | — | Purchase | 108 | $1.04 | $112 | 14,408 | Nov 27, 2024 |
| Malloy Kirk | — | Purchase | 50,000 | $0.91 | $45,500 | 64,300 | Aug 8, 2024 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Purchase | 10,000 | $0.78 | $7,800 | 348,157 | Aug 7, 2024 |
| Kollender Richard S | — | Purchase | 65,000 | $0.77 | $50,050 | 96,718 | Aug 6, 2024 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Purchase | 50,000 | $0.77 | $38,500 | 540,012 | Aug 6, 2024 |
| RICCIARDI NATALE S | — | Award / Grant | 14,300 | — | — | 14,300 | May 23, 2024 |
| LOWENSTEIN INESE | — | Award / Grant | 14,300 | — | — | 24,300 | May 23, 2024 |
| PEI MELINDA LITHERLAND | — | Award / Grant | 14,300 | — | — | 14,300 | May 23, 2024 |
| Kollender Richard S | — | Award / Grant | 14,300 | — | — | 31,718 | May 23, 2024 |
| Malloy Kirk | — | Award / Grant | 14,300 | — | — | 14,300 | May 23, 2024 |
| Hirsch David | — | Award / Grant | 14,300 | — | — | 14,300 | May 23, 2024 |
| Schwartz Jeffrey Lawrence | — | Award / Grant | 14,300 | — | — | 14,300 | May 23, 2024 |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | Tax Withholding | 9,569 | $0.98 | $9,378 | 188,738 | Mar 11, 2024 |
| VEZINA VICTORIA | CHIEF HUMAN RESOURCES OFFICER | Tax Withholding | 5,435 | $0.98 | $5,326 | 112,608 | Mar 11, 2024 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Tax Withholding | 7,454 | $0.98 | $7,305 | 325,403 | Mar 11, 2024 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Tax Withholding | 10,323 | $0.98 | $10,117 | 468,824 | Mar 11, 2024 |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | Tax Withholding | 5,809 | $0.96 | $5,577 | 198,307 | Feb 12, 2024 |
| VEZINA VICTORIA | CHIEF HUMAN RESOURCES OFFICER | Tax Withholding | 2,727 | $0.96 | $2,618 | 118,043 | Feb 12, 2024 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Tax Withholding | 3,794 | $0.96 | $3,642 | 332,857 | Feb 12, 2024 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Tax Withholding | 9,365 | $0.96 | $8,990 | 479,147 | Feb 12, 2024 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Award / Grant | 51,000 | — | — | 336,651 | Feb 6, 2024 |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | Award / Grant | 39,000 | — | — | 204,116 | Feb 6, 2024 |
| VEZINA VICTORIA | CHIEF HUMAN RESOURCES OFFICER | Award / Grant | 28,000 | — | — | 120,770 | Feb 6, 2024 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Award / Grant | 113,000 | — | — | 488,512 | Feb 6, 2024 |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | Purchase | 10,000 | $0.99 | $9,900 | 285,651 | Sep 6, 2023 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Purchase | 20,000 | $0.97 | $19,400 | 375,512 | Aug 15, 2023 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Purchase | 34,000 | $0.92 | $31,280 | 355,512 | Aug 8, 2023 |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | Purchase | 100 | $0.93 | $93 | 314,473 | May 17, 2023 |