Biological Products, Except Diagnostic Substances (Biotech) - Latest Activist Disclosures

This table shows recent activist investor (Schedule 13D) filings made in this industry. Any investor or hedge fund that makes an investment with the intention of influencing management is considered an activist investor and must file a 13D.

Date Form Target Company Investor Shares Ownership
(Percent)		 Ownership Change
(Percent)
2025-09-05 13D/A VALN / Valneva SE - Depositary Receipt (Common Stock) Bpifrance Participations SA 21,810,176 11.60 54.53
2025-09-02 13D/A SNTI / Senti Biosciences, Inc. Celadon Partners SPV 24 13,404,441 45.00 37.10
2025-08-29 13D/A VOR / Vor Biopharma Inc. Reprogrammed Interchange LLC 36,884,567 29.10 -5.36
2025-08-26 13D/A IVVD / Invivyd, Inc. M28 Capital Management LP 9,548,250 4.60 3.24
2025-08-19 13D/A ADAP / Adaptimmune Therapeutics plc - Depositary Receipt (Common Stock) New Enterprise Associates 14, L.P. 4 0.00 -100.00
2025-08-18 13D/A CMPX / Compass Therapeutics, Inc. Commander Aggregator, LP 7,788,150 4.50
2025-08-15 13D/A CMPX / Compass Therapeutics, Inc. Orbimed Advisors Llc 15,219,994 8.90 0.00
2025-08-14 13D/A ACLX / Arcellx, Inc. New Enterprise Associates 15, L.P. 3,055,360 5.51 -18.42
2025-08-14 13D/A SLDB / Solid Biosciences Inc. Ra Capital Management, L.p. 7,997,510 9.90
2025-08-12 13D/A ARMP / Armata Pharmaceuticals, Inc. Innoviva, Inc. 55,467,459 83.30 -13.57
2025-08-11 13D/A CDTX / Cidara Therapeutics, Inc. Ra Capital Management, L.p. 3,365,523 13.30 0.00
2025-07-31 13D/A ABVX / ABIVAX Société Anonyme - Depositary Receipt (Common Stock) Sofinnova Crossover I 9,599,478 11.40 23.16
2025-07-24 13D/A PASG / Passage Bio, Inc. Orbimed Advisors Llc 132,473 4.25 -45.68
2025-07-21 13D/A PASG / Passage Bio, Inc. Orbimed Advisors Llc 243,878 7.82 -95.88
2025-07-09 13D/A PASG / Passage Bio, Inc. Orbimed Advisors Llc 5,923,534 9.50 -10.92
2025-07-09 13D/A VOR / Vor Biopharma Inc. 5AM Ventures VI, L.P. 4,422,863 3.50 -30.48
2025-07-03 13D/A FATE / Fate Therapeutics, Inc. Redmile Group, LLC 17,941,579 14.90 0.70
2025-06-30 13D/A KYMR / Kymera Therapeutics, Inc. Baker Bros. Advisors Lp 6,666,540 9.50 11.09
2025-06-30 13D/A CDTX / Cidara Therapeutics, Inc. Ra Capital Management, L.p. 3,365,523 15.80 207.97
2025-06-27 13D/A VOR / Vor Biopharma Inc. Ra Capital Management, L.p. 39,739,850 31.80 0.08
2025-06-23 13D/A ENZN / Enzon Pharmaceuticals, Inc. Icahn Carl C 36,056,636 48.60 0.00
2025-06-20 13D/A CASI / CASI Pharmaceuticals, Inc. He Wei-Wu 3,735,535 23.80 14.66
2025-06-09 13D/A PLUR / Pluri Inc. Chen Franco-Yehuda 40,064 0.51
2025-06-05 13D/A PROK / ProKidney Corp. Tolerantia, LLC 106,901,339 36.50 -3.45
2025-06-03 13D/A TSHA / Taysha Gene Therapies, Inc. Manning Paul B 25,601,111 9.80 9.05
2025-06-02 13D NKGN / NKGen Biotech, Inc. CFIC-2015 NV Family Investments, LLC 63,175,321 47.20 1,416.21
2025-05-28 13D ZURA / Zura Bio Limited AI Biotechnology LLC 14,326,090 19.90
2025-05-28 13D/A OTLK / Outlook Therapeutics, Inc. GMS Ventures & Investments 29,040,929 50.30 79.44
2025-05-23 13D ATRA / Atara Biotherapeutics, Inc. Redmile Group, LLC 705,207 9.90 17.29
2025-05-22 13D BCDA / BioCardia, Inc. Blank Andrew Scott 278,253 5.50
2025-05-21 13D/A BCDA / BioCardia, Inc. Daly Joseph Patrick
2025-05-20 13D/A PLUR / Pluri Inc. Yanay Yaky 484,866 6.00 -94.57
2025-05-20 13D/A EXEL / Exelixis, Inc. Farallon Capital Partners, L.P. 18,635,500 6.80 -20.50
2025-05-19 13D/A AURA / Aura Biosciences, Inc. Matrix Capital Management Company, LP 6,922,870 11.17 0.00
2025-05-14 13D/A TNYA / Tenaya Therapeutics, Inc. Column Group Iii, Lp 49,313,559 30.30 0.00
2025-05-12 13D NKGN / NKGen Biotech, Inc. Paul Y. Song 63,738,042 54.30
2025-05-12 13D/A ACLX / Arcellx, Inc. New Enterprise Associates 15, L.P. 3,745,262 6.80 0.00
2025-05-08 13D/A INAB / IN8bio, Inc. BIOS Fund II, LP 9,120,073 9.99 -12.44
2025-05-02 13D HLVX / HilleVax, Inc. Tang Capital Management Llc 4,920,000 9.80
2025-04-25 13D/A PASG / Passage Bio, Inc. Orbimed Advisors Llc 6,650,000 10.70 -10.19
2025-04-25 13D CRBU / Caribou Biosciences, Inc. Haurwitz Rachel E. 4,716,003 5.00 7.70
2025-04-21 13D/A IMVT / Immunovant, Inc. Roivant Sciences Ltd. 96,660,341 56.90 0.00
2025-04-11 13D/A CMPX / Compass Therapeutics, Inc. Orbimed Advisors Llc 15,219,994 11.00 -19.01
2025-04-07 13D/A DBVT / DBV Technologies S.A. - Depositary Receipt (Common Stock) Bpifrance Participations SA 17,455,376 12.20 144.07
2025-03-31 13D/A DBVT / DBV Technologies S.A. - Depositary Receipt (Common Stock) Baker Bros. Advisors Lp 23,489,663 17.10 -0.00
2025-03-31 13D/A ABOS / Acumen Pharmaceuticals, Inc. Ra Capital Management, L.p. 15,016,063 24.80 0.23
2025-03-28 13D/A SRZN / Surrozen, Inc. Column Group Iii Gp, Lp 3,407,405 34.00 169.30
2025-03-17 13D/A SNTI / Senti Biosciences, Inc. Celadon Partners SPV 24 9,777,000 37.60 0.00
2025-03-13 13D/A ELUT / Elutia Inc. HighCape Capital, L.P. 9,611,039 26.40 4.57
2025-03-13 13D SNTI / Senti Biosciences, Inc. Celadon Partners SPV 24 9,777,000 37.60