RAPID MICRO BIOSYSTEMS INC-A (RPID) Institutional Ownership Changes & 13F Activity

RAPID MICRO BIOSYSTEMS INC-A (RPID). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Armistice Capital, Llc, Essex Investment Management Co Llc, Sei Investments Co, Susquehanna International Group, Llp, and Advent International, L.P..

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Citadel Advisors LlcBuy+16,142—16,142$27.93KQ2 2026Sep 02, 2026
Armistice Capital, LlcBuy+3,328,000—3,328,000$5.76MQ2 2026Aug 14, 2026
Sei Investments CoSell-217,947-76.5%66,869$115.68KQ2 2026Aug 14, 2026
Advent International, L.P.Sell-172,583-31.2%379,794$657.04KQ2 2026Aug 14, 2026
Jane Street Group, LlcSell-106,994-80.5%25,931$44.86KQ2 2026Aug 14, 2026
Millennium Management LlcSell-46,681-16.5%236,599$409.32KQ2 2026Aug 14, 2026
Hrt Financial LpBuy+23,093—23,093$39.00KQ2 2026Aug 14, 2026
Barclays PlcSell-21,258-98.4%337$583.00Q2 2026Aug 14, 2026
Xtx Topco LtdBuy+18,657+30.6%79,727$137.93KQ2 2026Aug 14, 2026
Larson Financial Group LlcBuy+2,904+52.9%8,395$14.52KQ2 2026Aug 14, 2026
Osaic Holdings, Inc.Buy+300+2.1%14,300$24.74KQ2 2026Aug 14, 2026
Renaissance Technologies LLCBuy+85,484+67.5%212,101$366.94KQ2 2026Aug 13, 2026
Algert Global LlcBuy+15,126+65.3%38,307$66.27KQ2 2026Aug 13, 2026
Northern Trust CorpSell-6,173-12.8%42,106$72.84KQ2 2026Aug 13, 2026
Ubs Group AgSell-4,645-41.3%6,607$11.43KQ2 2026Aug 13, 2026
Morgan StanleySell-1,620-5.5%27,587$47.73KQ2 2026Aug 13, 2026
Vanguard Fiduciary Trust CoBuy+772+0.7%110,484$191.14KQ2 2026Aug 13, 2026
Vanguard Capital Management LlcSell-460-0.0%982,034$1.70MQ2 2026Aug 13, 2026
Geode Capital Management, LlcSell-19,136-7.7%228,041$394.71KQ2 2026Aug 12, 2026
American Century Companies IncSell-5,284-31.2%11,638$20.13KQ2 2026Aug 12, 2026
Jpmorgan Chase & CoBuy+109—109$189.00Q2 2026Aug 12, 2026
Dimensional Fund Advisors LpBuy+16,603+19.0%104,192$180.25KQ2 2026Aug 11, 2026
Tower Research Capital Llc (Trc)Buy+1,900—1,900$3.29KQ2 2026Aug 11, 2026
Blackrock, Inc.Buy+32,600+20.7%189,832$328.41KQ2 2026Aug 07, 2026
Essex Investment Management Co LlcSell-521,235-59.0%362,696$627.46KQ2 2026Aug 06, 2026
Legato Capital Management LlcSell-155,390-56.5%119,534$206.79KQ2 2026Aug 06, 2026
Evernest Financial Advisors, LlcBuy+73,490+17.0%506,000$875.38KQ2 2026Aug 06, 2026
Caitong International Asset Management Co., LtdBuy+35—35$61.00Q2 2026Aug 05, 2026
Bank Of America CorpSell-31,014-100.0%0$0.00Q2 2026May 18, 2026
Susquehanna International Group, LlpSell-212,114-100.0%0$0.00Q2 2026May 15, 2026
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Frequently asked questions about RPID activity

  • Which institutional owners are buying RPID?

    Institutional owners buying RPID include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in RPID activity?

    "Buy" means an investor increased their reported position in RPID compared to the prior reporting period. This reflects growing exposure to RAPID MICRO BIOSYSTEMS INC-A (RPID) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in RPID increasing?

    Institutional interest in RPID can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.