RAPID MICRO BIOSYSTEMS INC (RPID)
Institutional ownership reported to the SEC as of Q2 2026, across 20 quarters.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Bain Capital Life Sciences Investors, LLC | $14.6M | 8,434,560 | 0.87% | 20q | HELD |
| ARMISTICE CAPITAL, LLC | $5.8M | 3,328,000 | 0.07% | new | NEW |
| ABG-WTT Global Life Science Capital Partners GP Ltd | $3.2M | 1,848,296 | 37.39% | 18q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $1.7M | 982,034 | 0.00% | 2q | HELD |
| Evernest Financial Advisors, LLC | $875.4K | 506,000 | 0.18% | 6q | +17.0%+$127.1K |
| Advent International, L.P. | $657.0K | 379,794 | 0.00% | 20q | -31.2%-$298.6K |
| ESSEX INVESTMENT MANAGEMENT CO LLC | $627.5K | 362,696 | 0.08% | 6q | -59.0%-$901.7K |
| MILLENNIUM MANAGEMENT LLC | $409.3K | 236,599 | 0.00% | 3q | -16.5%-$80.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $394.7K | 228,041 | 0.00% | 20q | -7.7%-$33.1K |
| RENAISSANCE TECHNOLOGIES LLC | $366.9K | 212,101 | 0.00% | 14q | +67.5%+$147.9K |
| BlackRock, Inc. | $328.4K | 189,832 | 0.00% | 8q | +20.7%+$56.4K |
| STATE STREET CORP | $324.8K | 187,748 | 0.00% | 20q | +100.0%+$162.4K |
| Legato Capital Management LLC | $206.8K | 119,534 | 0.02% | 6q | -56.5%-$268.8K |
| VANGUARD FIDUCIARY TRUST CO | $191.1K | 110,484 | 0.00% | 2q | +0.7%+$1.3K |
| DIMENSIONAL FUND ADVISORS LP | $180.3K | 104,192 | 0.00% | 6q | +19.0%+$28.7K |
| XTX Topco Ltd | $137.9K | 79,727 | 0.00% | 2q | +30.6%+$32.3K |
| SEI INVESTMENTS CO | $115.7K | 66,869 | 0.00% | 3q | -76.5%-$377.0K |
| NORTHERN TRUST CORP | $72.8K | 42,106 | 0.00% | 20q | -12.8%-$10.7K |
| ALGERT GLOBAL LLC | $66.3K | 38,307 | 0.00% | 2q | -17.4%-$13.9K |
| CITADEL ADVISORS LLC | $55.9K | 32,284 | 0.00% | new | NEW |
| MORGAN STANLEY | $47.7K | 27,587 | 0.00% | 20q | -5.5%-$2.8K |
| JANE STREET GROUP, LLC | $44.9K | 25,931 | 0.00% | 4q | -80.5%-$185.1K |
| HRT FINANCIAL LP | $39.0K | 23,093 | 0.00% | new | NEW |
| OSAIC HOLDINGS, INC. | $24.7K | 14,300 | 0.00% | 6q | +2.1% |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | $21.6K | 12,500 | 0.02% | 3q | HELD |
| AMERICAN CENTURY COMPANIES INC | $20.1K | 11,638 | 0.00% | 6q | -31.2%-$9.1K |
| Vanguard Global Advisers, LLC | $20.1K | 11,630 | 0.00% | 2q | HELD |
| Larson Financial Group LLC | $14.5K | 8,395 | 0.00% | 2q | +52.9%+$5.0K |
| UBS Group AG | $11.4K | 6,607 | 0.00% | 6q | -41.3%-$8.0K |
| Tower Research Capital LLC (TRC) | $3.3K | 1,900 | 0.00% | new | NEW |
| BARCLAYS PLC | $583 | 337 | 0.00% | 3q | -98.4%-$36.8K |
| JPMORGAN CHASE & CO | $189 | 109 | 0.00% | 20q | HELD |
| Caitong International Asset Management Co., Ltd | $61 | 35 | 0.00% | new | NEW |
| SBI Securities Co., Ltd. | $26 | 15 | 0.00% | 6q | HELD |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G | Armistice Capital, LLCwith 1 co-filers | 7.3% |
| 2026-08-14 | 13G/A | Bain Capital Life Sciences Fund, L.P.with 1 co-filers | 16.8% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 34 | $30.5M | 17,633,281 | 5 | 9 | 13 | 0.0% |
| Q1 2026 | 46 | $36.0M | 15,863,060 | 10 | 16 | 9 | 0.0% |
| Q4 2025 | 42 | $42.5M | 14,620,290 | 14 | 11 | 8 | 0.0% |
| Q3 2025 | 29 | $49.5M | 14,829,096 | 4 | 8 | 7 | 0.0% |
| Q2 2025 | 29 | $52.3M | 15,145,610 | 3 | 10 | 8 | 0.0% |
| Q1 2025 | 28 | $40.4M | 15,315,094 | 14 | 8 | 4 | 0.0% |
| Q4 2024 | 18 | $10.8M | 11,949,084 | 2 | 6 | 3 | 0.0% |
| Q3 2024 | 17 | $11.5M | 12,940,273 | 2 | 2 | 5 | 0.0% |
| Q2 2024 | 19 | $12.6M | 19,083,027 | 1 | 4 | 7 | 0.0% |
| Q1 2024 | 21 | $18.9M | 19,695,057 | 1 | 5 | 5 | 0.0% |
| Q4 2023 | 23 | $11.8M | 15,913,742 | 4 | 6 | 3 | 0.0% |
| Q3 2023 | 23 | $23.2M | 21,457,255 | 1 | 4 | 6 | 0.0% |
| Q2 2023 | 22 | $20.8M | 20,835,041 | 1 | 4 | 5 | 0.0% |
| Q1 2023 | 29 | $28.5M | 21,767,544 | 1 | 4 | 11 | 0.0% |
| Q4 2022 | 40 | $26.5M | 23,463,173 | 5 | 9 | 12 | 0.0% |
| Q3 2022 | 49 | $82.8M | 25,634,695 | 7 | 8 | 13 | 0.0% |
| Q2 2022 | 48 | $112.2M | 26,108,376 | 14 | 8 | 15 | 0.0% |
| Q1 2022 | 58 | $181.0M | 26,648,497 | 11 | 22 | 12 | 0.0% |
| Q4 2021 | 55 | $232.0M | 21,821,890 | 11 | 20 | 9 | 0.0% |
| Q3 2021 | 49 | $401.4M | 21,751,575 | 49 | 0 | 0 | 0.0% |