Rapid Micro Biosystems Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqCM:RPID Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
09 Feb 26	SellUS$17,438	John J. Wilson	Individual	4,610	US$3.78
09 Feb 26	SellUS$48,570	Robert Spignesi	Individual	12,840	US$3.78
09 Feb 26	SellUS$22,798	Sean Wirtjes	Individual	6,027	US$3.78
04 Feb 26	SellUS$190,091	Longitude Capital Management Co., LLC	Company	49,000	US$3.88

Insider Trading Volume

Insider Buying: RPID insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of RPID?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	1,185,024	2.67%
Institutions	6,976,991	15.7%
General Public	16,499,705	37.2%
VC/PE Firms	19,660,835	44.4%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 61.06% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
19%	Bain Capital Life Sciences Investors, LLC	8,434,560	US$33.5m	0%	3.62%
11.2%	Kennedy Lewis Management LP	4,939,931	US$19.6m	0%	41.49%
9.09%	Longitude Capital Management Co., LLC	4,029,245	US$16.0m	13.3%	1.62%
5.09%	Endeavour Vision SA	2,257,099	US$9.0m	0%	13.0%
4.17%	Ally Bridge Group	1,848,296	US$7.3m	0%	3.19%
2.21%	The Vanguard Group, Inc.	978,781	US$3.9m	1.43%	no data
1.77%	Bain Capital, LP	783,191	US$3.1m	0%	0.03%
1.3%	Advent International, L.P.	577,777	US$2.3m	0%	0.04%
1.18%	Robert Spignesi	523,154	US$2.1m	4.96%	no data
0.8%	Parkman Healthcare Partners LLC	354,465	US$1.4m	-61.2%	0.15%
0.8%	Schonfeld Strategic Advisors LLC	352,433	US$1.4m	-45.5%	0.01%
0.63%	Sean Wirtjes	280,771	US$1.1m	4.08%	no data
0.49%	Geode Capital Management, LLC	217,568	US$863.7k	6.29%	no data
0.39%	Susquehanna International Group, LLP	172,235	US$683.8k	195%	no data
0.38%	John J. Wilson	167,181	US$663.7k	29.8%	no data
0.35%	BlackRock, Inc.	156,666	US$622.0k	-67.6%	no data
0.29%	Citadel Advisors LLC	126,539	US$502.4k	0%	no data
0.28%	Evernest Financial Advisors LLC	125,000	US$496.2k	-37.6%	0.11%
0.27%	683 Capital Management, LLC	120,773	US$479.5k	0%	0.04%
0.26%	Millennium Management LLC	116,502	US$462.5k	0%	no data
0.26%	Renaissance Technologies LLC	115,627	US$459.0k	4.94%	no data
0.24%	Jane Street Group, LLC	105,301	US$418.0k	176%	no data
0.22%	Richard Kollender	96,718	US$384.0k	0%	no data
0.21%	SEI Investments Company	93,616	US$371.7k	0%	no data
0.21%	State Street Global Advisors, Inc.	91,474	US$363.1k	0%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/02/20 13:36
End of Day Share Price	2026/02/20 00:00
Earnings	2025/09/30
Annual Earnings	2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Rapid Micro Biosystems, Inc. is covered by 7 analysts. 4 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Tycho Peterson	J.P. Morgan
Paul Knight	KeyBanc Capital Markets Inc.
Thomas Flaten	Lake Street Capital Markets, LLC