Rapid Micro Biosystems RPID Institutional Ownership

Rapid Micro Biosystems, Inc. (NASDAQ:RPID) is held by 33 institutional investors per 13F filings through June 2026.

• These investors held 36.0% of outstanding shares in June 2026, up from 34.3% in March 2026.
• Their total shares held in RPID increased 16.7% from the prior quarter, while the number of investors in Rapid Micro Biosystems increased 22.22% year over year.
• Activity in RPID broke down as 14 buyers, 12 sellers, and 7 unchanged among 33 total holders.
• The aggregate institutional position in Rapid Micro Biosystems amounted to 17.4Mn shares as of June 2026, up by 2.49Mn shares quarter on quarter, and up 2.33Mn shares year over year.
• As of June 30, 2026, Bain Capital Life Sciences Investors, LLC held the largest stake in Rapid Micro Biosystems with 8.43Mn shares, accounting for 17.45% of total shares outstanding.
• The largest buyers of Rapid Micro Biosystems for the quarter ending June 2026 were ARMISTICE CAPITAL, LLC (3.33Mn), RENAISSANCE TECHNOLOGIES LLC (85.48K), Evernest Financial Advisors, LLC (73.49K), BlackRock, Inc. (32.6K), HRT FINANCIAL LP (23.09K).
• Top sellers of RPID stock for the quarter ending June 2026 included ESSEX INVESTMENT MANAGEMENT CO LLC (521.24K), Sei Investments Co (217.95K), ADVENT INTERNATIONAL, L.P. (172.58K), JANE STREET GROUP, LLC (106.99K), MILLENNIUM MANAGEMENT LLC (46.68K).
• Business Quant data shows the 10 biggest positions in Rapid Micro Biosystems as of June 2026 are held by Bain Capital Life Sciences Investors, LLC (8.43Mn), ARMISTICE CAPITAL, LLC (3.33Mn), ABG-WTT Global Life Science Capital Partners GP Ltd (1.85Mn), VANGUARD CAPITAL MANAGEMENT LLC (982.03K), Evernest Financial Advisors, LLC (506.0K), ADVENT INTERNATIONAL, L.P. (379.79K), ESSEX INVESTMENT MANAGEMENT CO LLC (362.7K), MILLENNIUM MANAGEMENT LLC (236.6K), GEODE CAPITAL MANAGEMENT, LLC (228.04K), RENAISSANCE TECHNOLOGIES LLC (212.1K).