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RPID

Rapid Micro Biosystems Inc

Healthcare · Medical Devices

0.6814$ -1.5% vs. previous close Closing price · As of: Nov 4, 2026

Ownership

Ownership Structure

Who owns Rapid Micro Biosystems Inc (RPID)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 52.4% of the shares are freely tradable; institutional investors hold 54.1%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 54.1%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 10.3%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 52.4%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 2.8%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 46Mio.

Largest Shareholders

Institutions

Institutions RPID
Name Stake (%) Shares Change (%) Date
Bain Capital Life Sciences Investors, LLC 16.82 8,434,560 +0.0 06/30/2026
Armistice Capital, LLC 6.63 3,328,000 +0.0 06/30/2026
ABG-WTT Global Life Science Capital Partners GP Ltd 3.68 1,848,296 +0.0 06/30/2026
Vanguard Capital Management, LLC 1.96 982,034 +0.0 06/30/2026
Evernest Financial Advisors LLC 1.01 506,000 +17.0 06/30/2026
Advent International LP 0.76 379,794 -31.2 06/30/2026
Essex Investment Management Company, LLC 0.72 362,696 -59.0 06/30/2026
Millennium Management LLC 0.47 236,599 -16.5 06/30/2026
Geode Capital Management, LLC 0.45 228,041 -7.7 06/30/2026

Funds

Funds RPID
Name Stake (%) Shares Change (%) Date
Vanguard MStar Total Stk Mkt Idx Invest 1.50 750,984 +0.0 09/30/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: November 4, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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