RPID Institutional Ownership
Who owns Rapid Micro Biosystems, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 35 funds reported holding RPID at Jun 30, 2026.
- ▼14 buying vs 28 selling
- ▲Shares held by funds +10.3%
- ▼Funds holding -12
- ▲Superinvestors: 2 added, 1 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 35 | 47 | −25.5% |
| In funds' top 10 | 1 | 1 | 0.0% |
| 13F shares | 18.1M | 16.4M | +10.3% |
| Held by funds | – | – | – |
| New positions | 5 | 10 | −50.0% |
| Increased | 9 | 17 | −47.1% |
| Reduced | 12 | 10 | +20.0% |
| Sold out | 16 | 8 | +100.0% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in RPID
All superinvestors →
Who owns RPID
share of fund held shares- Index and passive funds9.7%
- Active managers and hedge funds89.9%
- Banks and brokers0.3%
- Pensions, insurers and other0.0%
The top 10 holders own 93.3% of all RPID shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
8 funds changed their position- Essex Investment Management Co LLCSold out−363K sh
- Temasek Holdings (Private) LtdNew+44K sh
- Pekin Hardy Strauss, Inc.New+40K sh
- FNY Investment Advisers, LLCNew+35K sh
- Wealth Analytics Partners, LLCNew+10K sh
🔒 Free account: see all 8.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Bain Capital Life Sciences Investors, LLC | – | 8.4M | $14.6M | 0 |
| 2 | Armistice Capital, LLC | – | 3.3M | $5.8M | +3.3M |
| 3 | ABG-WTT Global Life Science Capital Partners GP Ltd | – | 1.8M | $3.2M | 0 |
| 4 | Vanguard Capital Management LLC | – | 982K | $1.7M | −460 |
| 5 | Khazanah Nasional Berhad | – | 567K | $981K | 0 |
| 6 | Evernest Financial Advisors, LLC | – | 506K | $875K | +73K |
| 7 | Advent International, L.P. | – | 380K | $657K | −173K |
| 8 | Essex Investment Management Co LLC | – | 363K | $627K | −521K |
| 9 | Millennium Management LLC | – | 237K | $409K | −47K |
| 10 | Geode Capital Management, LLC | – | 228K | $395K | −19K |
- Armistice Capital, LLC+3.3M sh+$5.8M
- Renaissance Technologies LLC+85K sh+$148K
- Evernest Financial Advisors, LLC+73K sh+$127K
- BlackRock, Inc.+33K sh+$56K
- Hrt Financial LP+23K sh+$39K
- XTX Topco Ltd+19K sh+$32K
- Dimensional Fund Advisors LP+17K sh+$29K
- Citadel Advisors LLC+16K sh+$28K
- Essex Investment Management Co LLC−521K sh−$902K
- Susquehanna International Group, LLP−212K sh−$481K
- Sei Investments Co−218K sh−$377K
- Advent International, L.P.−173K sh−$299K
- 683 Capital Management, LLC−121K sh−$274K
- Legato Capital Management LLC−155K sh−$269K
- Jane Street Group, LLC−107K sh−$185K
- Goldman Sachs Group Inc−72K sh−$163K
RPID institutional ownership FAQ
Who owns the most RPID stock?
In Q2 2026 13F filings the largest holder of RPID was Bain Capital Life Sciences Investors, LLC, followed by Armistice Capital, LLC and ABG-WTT Global Life Science Capital Partners GP Ltd. Index fund managers are usually the biggest holders of large companies.
What percentage of RPID is owned by institutions?
35 funds reported holding 18.1M RPID shares at Jun 30, 2026.
Are hedge funds buying RPID?
In Q2 2026, 14 funds bought RPID (5 of them new positions) and 28 sold (16 sold out completely). Among well known investors, 2 added and 1 cut. Our fund sentiment for RPID is neutral.
What is RPID's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this RPID ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.