RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share (RPID)

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

CUSIP 75340L104 is the security identifier for RPID - RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share used to aggregate holder disclosures.

Q: How many institutions held RPID - RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share in Q3 2025?

29 institutional investors reported RPID - RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share for Q3 2025. Use the holders table for investor-level position and value details.

CUSIP: 75340L104

Q3 2025 13F Holders as of 30 Sep 2025

Security type / class: Equity / Class A common stock, $0.01 par value per share
Total 13F shares: 14,828,987
Total 13F value: $49,529,221
Share change: -320,249
SEC-reported price per share: $3.34
Number of holders: 29
Value change: -$1,092,903
Number of buys: 11
Number of sells: 11
Shares outstanding: 45,651,578

Security key

75340L104

Report period

Q3 2025

Institutions

Top holders

RPID full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2025 RAPID MICRO BIOSYSTEMS, INC. SEC filings RAPID MICRO BIOSYSTEMS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 75340L104

Newer quarter: Q4 2025

Recent filing periods:

Q3 2026 Q2 2026 Q1 2026 Q4 2025 Q3 2025

Ownership snapshot

Top reported holders of RPID - RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Robert G. Spignesi Jr.

Disclosed value leader

Bain Capital Life Science...

Comparable rows

1/15

Latest evidence

30 Jun 2025

13D/G 3/4/5 13F Lead comparable stake: 6.3% 14 rows are not safely comparable across share classes. 13D/G row: Robert G. Spignesi Jr. Showing 1-6 of 15 holder rows.

Quick read

Robert G. Spignesi Jr. leads the comparable SEC ownership view at 6.3%.

1 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Robert G. Spignesi Jr.'s linked filing trail.

Comparable ownership Top 1

Robert G. Spignesi Jr. 6.3%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Robert G. Spignesi Jr.	13D/G SPIGNESI ROBERT G JR 13D/G	6.3% Reported 13D/G · 28 Mar 2024	$9,133,033 2,647,256 shares	$0	28 Mar 2024
KENNEDY LEWIS MANAGEMENT LP	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$13,548,284 2,904,490 shares	—	02 Jun 2022
Jeffrey Lawrence Schwartz	3/4/5 Director, 10%+ Owner 3/4/5	— mixed-class rows	$8,288,331 8,477,510 shares mixed-class rows	—	23 May 2024
Gurinder Grewal	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$291,863 294,990 shares	—	19 Jul 2021
Longitude Prime Partners, LLC	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$148,410 150,000 shares	—	19 Jul 2021
Bain Capital Life Sciences Investors, LLC	13F Company 13F	— denominator unverified	$29,099,232 8,434,560 shares	—	30 Jun 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

14,828,987

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2025 vs Q2 2026 Across Filers

Q2 2026 holders

Q3 2025 holders

Holder diff

-6

Investor	Q2 2026 Shares	Q3 2025 Shares	Share Diff	Share Chg %	Q2 2026 value	Q3 2025 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend