# RAPID MICRO BIOSYSTEMS INC CLASS A COM

RAPID MICRO BIOSYSTEMS INC CLASS A COM is a security (CUSIP 75340L104) tracked across SEC portfolio filings. 44 institutional managers reported $34.0M on Form 13F as of 2026-06-30; 6 registered fund positions totaling $1.1M via N-PORT as of 2026-05-29.

## Summary

- Issuer: RAPID MICRO BIOSYSTEMS INC
- Class: CLASS A COM
- CUSIP: 75340L104
- Asset category: EC
- 13F holders: 44
- 13F value: $34.0M
- 13F period: 2026-06-30
- N-PORT fund positions: 6
- N-PORT value: $1.1M
- N-PORT report: 2026-05-29

## Top institutional holders (Form 13F)

_Showing 15 of 44 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| Bain Capital Life Sciences Investors, LLC | Boston, MA | $19.1M | 8,434,560 |
| ABG-WTT Global Life Science Capital Partners GP Ltd | HONG KONG, F4 | $4.2M | 1,848,296 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $2.8M | 978,781 |
| [Advent International, L.P.](https://search.stillhousedata.com/firm/105673) | BOSTON, MA | $1.3M | 552,377 |
| [Evernest Financial Advisors, LLC](https://search.stillhousedata.com/firm/328161) | CARMEL, IN | $875K | 506,000 |
| SEI INVESTMENTS CO | OAKS, PA | $647K | 284,816 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $643K | 283,280 |
| [ESSEX INVESTMENT MANAGEMENT CO LLC](https://search.stillhousedata.com/firm/109962) | BOSTON, MA | $627K | 362,696 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $561K | 247,177 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $481K | 212,114 |
| BlackRock, Inc. | New York, NY | $357K | 157,232 |
| JANE STREET GROUP, LLC | NEW YORK, NY | $302K | 132,925 |
| [RENAISSANCE TECHNOLOGIES LLC](https://search.stillhousedata.com/firm/106661) | NEW YORK, NY | $287K | 126,617 |
| [683 Capital Management, LLC](https://search.stillhousedata.com/firm/156181) | NEW YORK, NY | $274K | 120,773 |
| STATE STREET CORP | BOSTON, MA | $213K | 93,874 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [1290 Essex Small Cap Growth Fund](https://search.stillhousedata.com/fund/S000076802) | 1290 Funds | $492K | 43.89% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $462K | 0.06% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $52K | 0.07% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $32K | 0.01% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $32K | 0.01% |
| Guggenheim Active Allocation Fund | Guggenheim Active Allocation Fund | $173 | 0.00% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/75340L104.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.