Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in RPID held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Bain Capital Life Sciences Investors, LLC | 8.4M | $19.1M | 0.0% | 18.610% | 1.73% |
| 2 | ABG-WTT Global Life Science Capital Partners GP Ltd | 1.8M | $4.2M | 0.0% | 4.078% | 34.13% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 982K | $2.2M | β | 2.168% | 0.00% |
| 4 | ESSEX INVESTMENT MANAGEMENT CO LLC | 884K | $2.0M | +1318.2% | 1.950% | 0.32% |
| 5 | ADVENT INTERNATIONAL CORP/MA | 552K | $1.3M | -4.4% | 1.219% | 0.03% |
| 6 | Evernest Financial Advisors, LLC | 433K | $1.0M | +246.0% | 0.954% | 0.21% |
| 7 | SEI INVESTMENTS CO | 285K | $647K | +204.2% | 0.628% | 0.00% |
| 8 | MILLENNIUM MANAGEMENT LLC | 283K | $643K | +143.2% | 0.625% | 0.00% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 247K | $561K | +13.6% | 0.545% | 0.00% |
| 10 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 212K | $481K | +23.2% | 0.468% | 0.00% |
| 11 | BlackRock, Inc. | 157K | $357K | +0.4% | 0.347% | 0.00% |
| 12 | JANE STREET GROUP, LLC | 133K | $302K | +26.2% | 0.293% | 0.00% |
| 13 | RENAISSANCE TECHNOLOGIES LLC | 127K | $287K | +9.5% | 0.279% | 0.00% |
| 14 | 683 Capital Management, LLC | 121K | $274K | 0.0% | 0.266% | 0.02% |
| 15 | VANGUARD FIDUCIARY TRUST CO | 110K | $249K | β | 0.242% | 0.00% |
| 16 | STATE STREET CORP | 94K | $213K | +2.6% | 0.207% | 0.00% |
| 17 | DIMENSIONAL FUND ADVISORS LP | 88K | $199K | +55.9% | 0.193% | 0.00% |
| 18 | GOLDMAN SACHS GROUP INC | 72K | $163K | +30.0% | 0.159% | 0.00% |
| 19 | FIFTH LANE CAPITAL, LP | 71K | $161K | +301.1% | 0.157% | 0.20% |
| 20 | XTX Topco Ltd | 61K | $139K | β | 0.135% | 0.00% |
| 21 | NORTHERN TRUST CORP | 48K | $110K | +19.3% | 0.106% | 0.00% |
| 22 | BANK OF AMERICA CORP /DE/ | 31K | $70K | +139.9% | 0.068% | 0.00% |
| 23 | MORGAN STANLEY | 29K | $66K | -7.0% | 0.064% | 0.00% |
| 24 | Temasek Holdings (Private) Ltd | 22K | $50K | β | 0.048% | 0.00% |
| 25 | BARCLAYS PLC | 22K | $49K | -13.1% | 0.048% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in RPID β a direct measure of their conviction.
Filings activity in RPID during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new RPID position in Q1 2026
Institutions that fully closed their RPID position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 44 | +7.3% | 44.28% | 8.95 pp | $35M | 17% |
| Q4 2025 | 41 | +46% | 53.23% | 8.80 pp | $42M | 14% |
| Q3 2025 | 28 | +0.0% | 62.03% | 3.41 pp | $49M | 5.2% |
| Q2 2025 | 28 | +0.0% | 65.44% | +14.81 pp | $52M | +29% |
| Q1 2025 | 28 | +40% | 50.63% | +37.16 pp | $40M | +276% |
| Q4 2024 | 20 | +0.0% | 13.47% | 6.12 pp | $11M | 31% |
| Q3 2024 | 20 | 9.1% | 19.59% | +4.28 pp | $16M | +28% |
| Q2 2024 | 22 | β | 15.31% | β | $12M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying RPID stock.
Based on Q1 2026 13F filings, institutional ownership of Rapid Micro Biosystems, Inc. stands at 44.3%, held across 44 reporting institutions.
Bain Capital Life Sciences Investors, LLC is the largest reported institutional holder of RPID, with approximately 8,434,560 shares worth $0.02B as of Q1 2026.
Yes β 4 widely-followed marquee investors appear among the top 25 institutional holders of RPID, including MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, JANE STREET GROUP, LLC, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for RPID is 53 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
13 institutions opened new positions in RPID during Q1 2026, while 10 fully exited. 9 added to existing positions and 21 trimmed.
RPID institutional ownership fell by 8.95 percentage points quarter-over-quarter, with a net change of +3 holders.
The top 10 institutions account for 91.1% of all reported 13F value in RPID, and the top 25 account for 98.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Rapid Micro Biosystems, Inc. (RPID) Institutional Ownership