How many institutions held RPID - RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 in Q1 2026?

3 institutional investors reported RPID - RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 for Q1 2026. 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

Q1 2026 13F Holders as of 31 Mar 2026

Type / Class: Equity / Common Stock, par value $0.01
Shares outstanding: 39,598,228
Total 13F shares: 443,777
Share change: +318,721
Total reported value: $1,046,300
Price per share: $2.27
Number of holders: 3
Value change: +$751,173
Number of buys: 2

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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Previous quarter: Q4 2025

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	13F 3/4/5	Company · 10%+ Owner	21%	8,434,560	$24,460,224	—	31 Dec 2025	13F 3/4/5
KENNEDY LEWIS MANAGEMENT LP	3/4/5	10%+ Owner	— class O/S missing	2,904,490	$13,548,284	—	02 Jun 2022	3/4/5
Longitude Capital Partners II, LLC	3/4/5	10%+ Owner	10%	4,029,245	$11,694,480	-$663,949	04 Feb 2026	3/4/5
Robert G. Spignesi Jr.	13D/G 3/4/5	SPIGNESI ROBERT G JR · PRESIDENT AND CEO, Director	6.3%	2,647,256	$9,133,033	$0	28 Mar 2024	13D/G 3/4/5
Jeffrey Lawrence Schwartz	3/4/5	Director, 10%+ Owner	— mixed-class rows	8,477,510 mixed-class rows	$8,288,331	—	23 May 2024	3/4/5
Endeavour Medtech Growth II LP	13D/G	—	5.7%	2,257,099	$6,545,587	$0	31 Dec 2025	13D/G
ABG-WTT Global Life Science Capital Partners GP Ltd	13F	Company	4.7%	1,848,296	$5,360,058	—	31 Dec 2025	13F
VANGUARD GROUP INC	13F	Company	2.5%	978,781	$2,838,465	—	31 Dec 2025	13F
Sean M. Wirtjes	3/4/5	CHIEF FINANCIAL OFFICER	— mixed-class rows	749,194 mixed-class rows	$2,401,701	-$122,785	11 Mar 2026	3/4/5
ADVENT INTERNATIONAL, L.P.	13F	Company	1.5%	577,777	$1,675,553	—	31 Dec 2025	13F
John J. Addington Wilson	3/4/5	CHIEF OPERATING OFFICER	— mixed-class rows	463,762 mixed-class rows	$1,367,809	-$80,101	11 Mar 2026	3/4/5
Parkman Healthcare Partners LLC	13F	Company	0.9%	354,465	$1,027,949	—	31 Dec 2025	13F
Schonfeld Strategic Advisors LLC	13F	Company	0.89%	352,433	$1,022,055	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.55%	217,568	$631,116	—	31 Dec 2025	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.43%	172,235	$499,482	—	31 Dec 2025	13F
Evernest Financial Advisors, LLC	13F	Company	0.32%	125,000	$468,750	—	31 Dec 2025	13F
BlackRock, Inc.	13F	Company	0.4%	156,666	$454,332	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	0.32%	126,539	$366,963	—	31 Dec 2025	13F
683 Capital Management, LLC	13F	Company	0.3%	120,773	$350,242	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.29%	116,502	$337,856	—	31 Dec 2025	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.29%	115,627	$335,318	—	31 Dec 2025	13F
JANE STREET GROUP, LLC	13F	Company	0.27%	105,301	$305,372	—	31 Dec 2025	13F
Gurinder Grewal	3/4/5	10%+ Owner	— class O/S missing	294,990	$291,863	—	19 Jul 2021	3/4/5
SEI INVESTMENTS CO	13F	Company	0.24%	93,616	$271,486	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	0.23%	91,474	$265,275	—	31 Dec 2025	13F
Richard S. Kollender	3/4/5	Director	— mixed-class rows	139,668 mixed-class rows	$260,892	—	22 May 2025	3/4/5
Informed Momentum Co LLC	13F	Company	0.19%	77,182	$223,828	—	31 Dec 2025	13F
MARSHALL WACE, LLP	13F	Company	0.16%	62,911	$182,443	—	31 Dec 2025	13F
ESSEX INVESTMENT MANAGEMENT CO LLC	13F	Company	0.16%	62,326	$180,745	—	31 Dec 2025	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.14%	56,182	$162,481	—	31 Dec 2025	13F
Melinda Litherland Pei	3/4/5	Director	— mixed-class rows	97,250 mixed-class rows	$161,210	—	22 May 2025	3/4/5
GOLDMAN SACHS GROUP INC	13F	Company	0.14%	55,306	$160,387	—	31 Dec 2025	13F
Longitude Prime Partners, LLC	3/4/5	10%+ Owner	— class O/S missing	150,000	$148,410	—	19 Jul 2021	3/4/5
Jonathan Paris	3/4/5	SVP, GENERAL COUNSEL	— mixed-class rows	325,398 mixed-class rows	$127,334	—	09 Mar 2023	3/4/5
NORTHERN TRUST CORP	13F	Company	0.1%	40,487	$117,412	—	31 Dec 2025	13F
Kirk Malloy	3/4/5	Director	— mixed-class rows	67,250 mixed-class rows	$113,870	—	14 Nov 2025	3/4/5
Victoria Vezina	3/4/5	CHIEF HUMAN RESOURCES OFFICER	— mixed-class rows	168,608 mixed-class rows	$110,468	—	11 Mar 2024	3/4/5
Qube Research & Technologies Ltd	13F	Company	0.08%	33,099	$95,987	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0.08%	31,389	$91,028	—	31 Dec 2025	13F
Inese Lowenstein	3/4/5	Director	— mixed-class rows	67,250 mixed-class rows	$90,710	—	22 May 2025	3/4/5
Point72 Asset Management, L.P.	13F	Company	0.08%	30,367	$88,064	—	31 Dec 2025	13F
NANO CAP NEW MILLENNIUM GROWTH FUND L P	13F	Company	0.06%	25,000	$72,500	—	31 Dec 2025	13F
BARCLAYS PLC	13F	Company	0.06%	24,859	$72,091	—	31 Dec 2025	13F
OMERS ADMINISTRATION Corp	13F	Company	0.06%	24,400	$70,760	—	31 Dec 2025	13F
FIFTH LANE CAPITAL, LP	13F	Company	0.04%	17,700	$51,330	—	31 Dec 2025	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.04%	16,922	$49,074	—	31 Dec 2025	13F
Lighthouse Investment Partners, LLC	13F	Company	0.04%	15,720	$45,588	—	31 Dec 2025	13F
Richard A. Keys	3/4/5	CHIEF COMMERCIAL OFFICER	— mixed-class rows	131,250 mixed-class rows	$43,286	—	11 Feb 2022	3/4/5
Legato Capital Management LLC	13F	Company	0.04%	14,684	$42,584	—	31 Dec 2025	13F
OSAIC HOLDINGS, INC.	13F	Company	0.04%	14,300	$41,470	—	31 Dec 2025	13F

Institutional Holders of RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 (RPID) as of Q1 2026

As of 31 Mar 2026, RAPID MICRO BIOSYSTEMS, INC. - Common Stock, par value $0.01 (RPID) was held by 3 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 443,777 shares. The largest 3 holders included Evernest Financial Advisors, LLC, UBS Group AG, and SBI Securities Co., Ltd.. This page lists 3 institutional shareholders reporting positions in this security for the Q1 2026 filing period.

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

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders

Q1 2026 holders

Holder diff

-39

Investor	Q4 2025 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q4 2025 Value $	Q1 2026 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.