How many institutions held RPID - RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 in Q3 2021?

49 institutional investors reported RPID - RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 for Q3 2021. Use the holders table for investor-level position and value details.

RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 (RPID)

Q: What does CUSIP 75340L104 represent in this 13F holders report?

CUSIP 75340L104 is the security identifier for RPID - RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 used to aggregate holder disclosures.

CUSIP: 75340L104

Q3 2021 13F Holders as of 30 Sep 2021

Type / Class: Equity / Common Stock, par value $0.01
Shares outstanding: 39,598,228
Total 13F shares: 21,751,532
Share change: +21,751,532
Total reported value: $401,371,000
Price per share: $18.47
Number of holders: 49
Value change: +$401,371,000
Number of buys: 49

Quarterly Holders Quick Answers

What is CUSIP 75340L104?
CUSIP 75340L104 identifies RPID - RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 in SEC institutional holdings data.

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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q4 2021

Recent filing periods for CUSIP 75340L104:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of RPID - RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Bain Capital Life Sciences Investors, LLC	3/4/5	10%+ Owner	— class O/S missing	8,434,560	$8,345,154	—	19 Jul 2021	3/4/5
Gurinder Grewal	3/4/5	10%+ Owner	— class O/S missing	294,990	$291,863	—	19 Jul 2021	3/4/5
Longitude Prime Partners, LLC	3/4/5	10%+ Owner	— class O/S missing	150,000	$148,410	—	19 Jul 2021	3/4/5
Alexander Schmitz	3/4/5	Director	— class O/S missing	25,000	—	—	14 Jul 2021	3/4/5

Institutional Holders of RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 (RPID) as of Q3 2021

As of 30 Sep 2021, RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 (RPID) was held by 49 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 21,751,532 shares. The largest 10 holders included Bain Capital Life Sciences Investors, LLC, D1 Capital Partners L.P., PRICE T ROWE ASSOCIATES INC /MD/, JPMORGAN CHASE & CO, BlackRock Inc., VANGUARD GROUP INC, ADAGE CAPITAL PARTNERS GP, L.L.C., ADVENT INTERNATIONAL CORP/MA, Sectoral Asset Management Inc, and Ally Bridge Group (NY) LLC. This page lists 49 institutional shareholders reporting positions in this security for the Q3 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q3 2021 vs Q4 2025 Across Filers

Q4 2025 holders

Q3 2021 holders

Holder diff

Investor	Q4 2025 Shares	Q3 2021 Shares	Share Diff	Share Chg %	Q4 2025 Value $	Q3 2021 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.