Rapid Micro Biosystems Inc. Class ARPID
13F holders, Q2 2026 (June 30)At the end of Q2 2026, 34 institutions reported holding Rapid Micro Biosystems Inc. Class A (RPID) in their 13F filings, down 12 from Q1 2026. 5 opened new positions and 16 sold out. The largest holders were Bain Capital Life Sciences Investors, LLC ($14.6M), Armistice Capital, LLC ($5.8M) and ABG-WTT Global Life Science Capital Partners GP Ltd ($3.2M). 3 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Rapid Micro Biosystems Inc. Class A
- CUSIP
- 75340L104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 5 | $5.8M |
| Exits | 16 | $1.5M |
All 13F filers, Q1 2026 → Q2 2026: 3,615,106 shares bought and 1,931,532 shares sold, net +1,683,574 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 34 holders
| Bain Capital Life Sciences Investors, LLC | 0.87% | No change | 8,434,560 | $14.6M |
| Armistice Capital, LLC | 0.16% | New | 3,328,000 | $5.8M |
| ABG-WTT Global Life Science Capital Partners GP Ltd | 37.39% | No change | 1,848,296 | $3.2M |
| Vanguard Capital Management LLC | 0.00% | Reduce -0.1% | 982,034 | $1.7M |
| Evernest Financial Advisors, LLC | 0.18% | Add +17.0% | 506,000 | $875K |
| Advent International, L.P. | 0.00% | Reduce -31.2% | 379,794 | $657K |
| Essex Investment Management Co. LLC | 0.08% | Reduce -59.0% | 362,696 | $627K |
| Millennium Management | 0.00% | Reduce -16.5% | 236,599 | $409K |
| Geode Capital Management, LLC | 0.00% | Reduce -7.7% | 228,041 | $395K |
| Renaissance Technologies | 0.00% | Add +67.5% | 212,101 | $367K |
| BlackRock, Inc. | 0.00% | Add +20.7% | 189,832 | $328K |
| Legato Capital Management LLC | 0.02% | Reduce -56.5% | 119,534 | $207K |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +0.7% | 110,484 | $191K |
| Dimensional Fund Advisors LP | 0.00% | Add +19.0% | 104,192 | $180K |
| State Street Corp. | 0.00% | No change | 93,874 | $162K |
| XTX Topco Ltd | 0.00% | Add +30.6% | 79,727 | $138K |
| Sei Investments Co. | 0.00% | Reduce -76.5% | 66,869 | $116K |
| Northern Trust Corp. | 0.00% | Reduce -12.8% | 42,106 | $73K |
| Algert Global LLC | 0.00% | Add +65.3% | 38,307 | $66K |
| Morgan Stanley | 0.00% | Reduce -5.5% | 27,587 | $48K |
| Jane Street Group, LLC | 0.00% | Reduce -80.5% | 25,931 | $45K |
| HRT Financial LP | 0.00% | New | 23,093 | $39K |
| Citadel Advisors | 0.00% | New | 16,142 | $28K |
| Osaic Holdings, Inc. | 0.00% | Add +2.1% | 14,300 | $25K |
| Nano Cap New Millennium Growth Fund L P | 0.02% | No change | 12,500 | $22K |
| American Century Companies Inc. | 0.00% | Reduce -31.2% | 11,638 | $20K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 11,630 | $20K |
| Larson Financial Group LLC | 0.00% | Add +52.9% | 8,395 | $15K |
| UBS Group AG | 0.00% | Reduce -41.3% | 6,607 | $11K |
| Tower Research Capital LLC (TRC) | 0.00% | New | 1,900 | $3K |
| Barclays PLC | 0.00% | Reduce -98.4% | 337 | $583 |
| JPMorgan Chase & Co. | 0.00% | No change | 109 | $189 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 35 | $61 |
| SBI Securities Co., Ltd. | 0.00% | No change | 15 | $26 |
"% of holder's portfolio" is RPID's weight in each manager's 13F, not the share of Rapid Micro Biosystems Inc. Class A the manager owns.