Rapid Micro Biosystems, Inc. (RPID) · Insider trading
What Rapid Micro Biosystems's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$0
0 insiders, 0 trades
Sold, 12 months
$1.14M
4 insiders, 0% under a plan
Net, 12 months
−$1.14M
bought less sold
Latest filing
2026-07-24
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Enright Patrick G10% owner | – | $663,855 | 5 | 2026-02-04 | – |
| Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | – | $467,239 | 8 | 2026-03-10 | 1,169,848 |
| Wirtjes Sean MCHIEF FINANCIAL OFFICER | – | $122,731 | 3 | 2026-03-11 | 556,194 |
| Wilson John J. AddingtonCHIEF OPERATING OFFICER | – | $80,091 | 3 | 2026-03-11 | 316,762 |
| Pei Melinda LitherlandDirector | $41,364 | – | 4 | 2024-12-05 | 54,300 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-03-11 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Sale | 7,480 | 4.32 | $32,314 | 556,194 | Form 4 |
| 2026-03-11 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Sale | 9,603 | 4.32 | $41,485 | 316,762 | Form 4 |
| 2026-03-10 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 17,922 | 4.11 | $73,659 | 1,169,848 | Form 4 |
| 2026-02-20 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Sale | 17,254 | 3.92 | $67,636 | 563,674 | Form 4 |
| 2026-02-20 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Sale | 5,403 | 3.92 | $21,180 | 326,365 | Form 4 |
| 2026-02-19 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 38,327 | 3.89 | $149,092 | 1,187,770 | Form 4 |
| 2026-02-09 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Sale | 6,027 | 3.78 | $22,782 | 483,928 | Form 4 |
| 2026-02-09 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 12,840 | 3.78 | $48,535 | 962,097 | Form 4 |
| 2026-02-09 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Sale | 4,610 | 3.78 | $17,426 | 257,768 | Form 4 |
| 2026-02-04 | Enright Patrick G10% ownerwith Tammenoms Bakker Juliet, Longitude Venture Partners II, L.P., Longitude Capital Partners II, LLC, Longitude Prime Partners, LLC, Longitude Prime Fund, L.P. | Saleindirect | 49,000 | 3.88 | $190,120 | 0 | Form 4 |
| 2026-02-03 | Enright Patrick G10% ownerwith Tammenoms Bakker Juliet, Longitude Venture Partners II, L.P., Longitude Capital Partners II, LLC, Longitude Prime Partners, LLC | Saleindirect | 27,500 | 4.24 | $116,600 | 49,000 | Form 4 |
| 2026-02-02 | Enright Patrick G10% ownerwith Tammenoms Bakker Juliet, Longitude Venture Partners II, L.P., Longitude Capital Partners II, LLC, Longitude Prime Partners, LLC | Saleindirect | 27,500 | 4.25 | $116,875 | 76,500 | Form 4 |
| 2026-01-30 | Enright Patrick G10% ownerwith Tammenoms Bakker Juliet, Longitude Venture Partners II, L.P., Longitude Capital Partners II, LLC, Longitude Prime Partners, LLC | Saleindirect | 46,000 | 4.54 | $208,840 | 104,000 | Form 4 |
| 2026-01-23 | Enright Patrick G10% ownerwith Tammenoms Bakker Juliet, Longitude Venture Partners II, L.P., Longitude Capital Partners II, LLC, Longitude Prime Partners, LLC | Saleindirect | 7,739 | 4.06 | $31,420 | 4,029,245 | Form 4 |
| 2025-07-14 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 11,881 | 3.32 | $39,445 | 970,550 | Form 4 |
| 2025-07-11 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 11,874 | 3.33 | $39,540 | 957,286 | Form 4 |
| 2025-07-10 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 11,617 | 3.40 | $39,498 | 944,015 | Form 4 |
| 2025-07-09 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 11,247 | 3.51 | $39,477 | 900,583 | Form 4 |
| 2025-07-08 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Sale | 10,824 | 3.51 | $37,992 | 886,686 | Form 4 |
| 2024-12-05 | Pei Melinda LitherlandDirector | Buy | 9,120 | 1.04 | $9,485 | 54,300 | Form 4 |
| 2024-12-03 | Pei Melinda LitherlandDirector | Buy | 10,880 | 1.00 | $10,880 | 45,180 | Form 4 |
| 2024-11-27 | Pei Melinda LitherlandDirector | Buy | 19,892 | 1.05 | $20,887 | 34,300 | Form 4 |
| 2024-11-26 | Pei Melinda LitherlandDirector | Buy | 108 | 1.04 | $112 | 14,408 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
21 × grant or award11 × option exercise11 × shares withheld for tax1 × option exercise1 × gift
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-07-24 | Kollender Richard SDirector | Option exercise M | +1,681 | 0.75 | 131,999 | Form 4 |
| 2026-07-24 | Kollender Richard SDirector | Option exercise M | +1,827 | 0.75 | 133,826 | Form 4 |
| 2026-07-22 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +1,402 | 0.75 | 1,191,973 | Form 4 |
| 2026-05-29 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Grant or award A | +12,787 | 1.96 | 568,981 | Form 4 |
| 2026-05-29 | Malloy KirkDirector | Grant or award A | +12,787 | 1.96 | 60,687 | Form 4 |
| 2026-05-29 | Pei Melinda LitherlandDirector | Grant or award A | +12,787 | 1.96 | 100,687 | Form 4 |
| 2026-05-29 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Grant or award A | +12,787 | 1.96 | 1,190,571 | Form 4 |
| 2026-05-29 | Lowenstein IneseDirector | Grant or award A | +12,787 | 1.96 | 70,687 | Form 4 |
| 2026-05-21 | Malloy KirkDirector | Grant or award A | +19,300 | – | 47,900 | Form 4 |
| 2026-05-21 | Kollender Richard SDirector | Grant or award A | +19,300 | – | 130,318 | Form 4 |
| 2026-05-21 | Pei Melinda LitherlandDirector | Grant or award A | +19,300 | – | 87,900 | Form 4 |
| 2026-05-21 | Lowenstein IneseDirector | Grant or award A | +19,300 | – | 57,900 | Form 4 |
| 2026-05-21 | Bika DafniDirector | Grant or award A | +19,300 | – | 19,300 | Form 4 |
| 2026-02-27 | Ricciardi Natale SDirector | Option exercise M | +842 | 0.75 | 29,442 | Form 4 |
| 2026-02-11 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Grant or award A | +264,000 | – | 1,226,097 | Form 4 |
| 2026-02-11 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Grant or award A | +97,000 | – | 580,928 | Form 4 |
| 2026-02-11 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Grant or award A | +74,000 | – | 331,768 | Form 4 |
| 2026-01-23 | Enright Patrick G10% owner | Option exercise X | +629,032 | 0.05 | 4,036,984 | Form 4 |
| 2025-11-14 | Malloy KirkDirector | Gift G | −40,000 | – | 28,600 | Form 4 |
| 2025-10-17 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +3,400 | 0.75 | 973,950 | Form 4 |
| 2025-10-17 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Shares withheld for tax F | −2,072 | 3.08 | 971,878 | Form 4 |
| 2025-10-17 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +7,833 | 0.75 | 979,711 | Form 4 |
| 2025-10-17 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Shares withheld for tax F | −4,774 | 3.08 | 974,937 | Form 4 |
| 2025-07-14 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +25,145 | – | 982,431 | Form 4 |
| 2025-07-11 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +25,145 | – | 969,160 | Form 4 |
| 2025-07-10 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +25,145 | – | 925,728 | Form 4 |
| 2025-07-09 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +25,144 | – | 911,830 | Form 4 |
| 2025-07-08 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Option exercise M | +25,144 | – | 897,510 | Form 4 |
| 2025-05-22 | Ricciardi Natale SDirector | Grant or award A | +14,300 | – | 28,600 | Form 4 |
| 2025-05-22 | Malloy KirkDirector | Grant or award A | +14,300 | – | 78,600 | Form 4 |
| 2025-05-22 | Kollender Richard SDirector | Grant or award A | +14,300 | – | 111,018 | Form 4 |
| 2025-05-22 | Pei Melinda LitherlandDirector | Grant or award A | +14,300 | – | 68,600 | Form 4 |
| 2025-05-22 | Lowenstein IneseDirector | Grant or award A | +14,300 | – | 38,600 | Form 4 |
| 2025-03-09 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Shares withheld for tax F | −9,872 | 2.39 | 232,474 | Form 4 |
| 2025-03-09 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Shares withheld for tax F | −7,690 | 2.39 | 489,955 | Form 4 |
| 2025-03-09 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Shares withheld for tax F | −10,650 | 2.39 | 872,366 | Form 4 |
| 2025-02-18 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Grant or award A | +365,000 | – | 883,016 | Form 4 |
| 2025-02-18 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Grant or award A | +160,000 | – | 497,645 | Form 4 |
| 2025-02-18 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Grant or award A | +44,000 | – | 242,346 | Form 4 |
| 2025-02-11 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Shares withheld for tax F | −10,755 | 2.68 | 516,205 | Form 4 |
| 2025-02-11 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Shares withheld for tax F | −4,621 | 2.68 | 337,645 | Form 4 |
| 2025-02-11 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Shares withheld for tax F | −7,075 | 2.68 | 198,346 | Form 4 |
| 2025-02-06 | Spignesi Robert G. Jr.Director, PRESIDENT AND CEO | Shares withheld for tax F | −13,052 | 3.10 | 526,960 | Form 4 |
| 2025-02-06 | Wirtjes Sean MCHIEF FINANCIAL OFFICER | Shares withheld for tax F | −5,891 | 3.10 | 342,266 | Form 4 |
| 2025-02-06 | Wilson John J. AddingtonCHIEF OPERATING OFFICER | Shares withheld for tax F | −4,505 | 3.10 | 205,421 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.