Over the 90-day window ending February 19, 2026, Rapid Micro Biosystems's three dominant insider ownership positions are held by TenPercentOwner Capital Life Sciences Investors, Llc Bain (8.43Mn shares), Director David Hirsch (3.42Mn shares), TenPercentOwner Lewis Management Lp Kennedy (2.90Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Capital Life Sciences Investors, Llc Bain | 8,434,560 | 21 Jul, 2021 | |
| David Hirsch | 3,422,252 | 28 May, 2024 | |
| Lewis Management Lp Kennedy | 2,904,490 | 06 Jun, 2022 | |
| Richard S Kollender | 1,592,027 | 27 May, 2025 | |
| Robert G. Jr. Spignesi | President And Ceo | 1,226,097 | 13 Feb, 2026 |
| Sean M Wirtjes | Chief Financial Officer | 580,928 | 13 Feb, 2026 |
| John J. Addington Wilson | Chief Operating Officer | 331,768 | 13 Feb, 2026 |
| Gurinder Grewal | 294,990 | 20 Jul, 2021 | |
| Jonathan Paris | Svp And General Counsel | 128,698 | 13 Mar, 2023 |
| Victoria Vezina | Chief Human Resources Officer | 112,608 | 12 Mar, 2024 |
| Melinda Litherland Pei | 68,600 | 27 May, 2025 | |
| Richard A Keys | Chief Commercial Officer | 43,750 | 15 Feb, 2022 |
| Inese Lowenstein | 38,600 | 27 May, 2025 | |
| Kirk Malloy | 28,600 | 18 Nov, 2025 | |
| Natale S Ricciardi | 28,600 | 27 May, 2025 | |
| Jeffrey Lawrence Schwartz | 14,300 | 28 May, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 11 Feb, 2026 | Sean M Wirtjes | Class A Common Stock | A | 97,000 | $0.00 | 580,928 | D | A |
| 11 Feb, 2026 | Robert G. Jr. Spignesi | Class A Common Stock | A | 264,000 | $0.00 | 1,226,097 | D | A |
| 11 Feb, 2026 | John J. Addington Wilson | Class A Common Stock | A | 74,000 | $0.00 | 331,768 | D | A |
| 09 Feb, 2026 | Sean M Wirtjes | Class A Common Stock | D | 6,027 | $3.78 | 483,928 | D | S |
| 09 Feb, 2026 | Robert G. Jr. Spignesi | Class A Common Stock | D | 12,840 | $3.78 | 962,097 | D | S |
| 09 Feb, 2026 | John J. Addington Wilson | Class A Common Stock | D | 4,610 | $3.78 | 257,768 | D | S |
| 04 Feb, 2026 | Capital Partners Ii, Llc Longitude | Class A Common Stock | D | 49,000 | $3.88 | 0 | I | S |
| 03 Feb, 2026 | Capital Partners Ii, Llc Longitude | Class A Common Stock | D | 27,500 | $4.24 | 49,000 | I | S |
| 02 Feb, 2026 | Capital Partners Ii, Llc Longitude | Class A Common Stock | D | 27,500 | $4.25 | 76,500 | I | S |
| 30 Jan, 2026 | Capital Partners Ii, Llc Longitude | Class A Common Stock | D | 46,000 | $4.54 | 104,000 | I | S |
| 23 Jan, 2026 | Capital Partners Ii, Llc Longitude | Class A Common Stock | D | 7,739 | $4.06 | 4,029,245 | I | S |
| 23 Jan, 2026 | Capital Partners Ii, Llc Longitude | Class A Common Stock | A | 629,032 | $0.05 | 4,036,984 | I | X |
| 14 Nov, 2025 | Kirk Malloy | - | - | 28,600 | D | |||
| 14 Nov, 2025 | Kirk Malloy | Class A Common Stock | D | 40,000 | $0.00 | 28,600 | D | G |
| 17 Oct, 2025 | Robert G. Jr. Spignesi | Class A Common Stock | A | 7,833 | $0.75 | 979,711 | D | M |
| 17 Oct, 2025 | Robert G. Jr. Spignesi | Class A Common Stock | D | 4,774 | $3.08 | 974,937 | D | F |
| 17 Oct, 2025 | Robert G. Jr. Spignesi | Class A Common Stock | D | 2,072 | $3.08 | 971,878 | D | F |
| 17 Oct, 2025 | Robert G. Jr. Spignesi | Class A Common Stock | A | 3,400 | $0.75 | 973,950 | D | M |
| 14 Jul, 2025 | Robert G. Jr. Spignesi | Class A Common Stock | D | 11,881 | $3.32 | 970,550 | D | S |
| 14 Jul, 2025 | Robert G. Jr. Spignesi | Class A Common Stock | A | 25,145 | $0.00 | 982,431 | D | M |