Pharmaceutical Preparations - 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)
2026-06-04 13D/A AUPH / Aurinia Pharmaceuticals Inc. Tang Capital Management Llc 13,044,106 10.00 6.66
2026-06-03 13D/A PRQR / ProQR Therapeutics N.V. Van Herk Investments B.v. 15,384,250 14.60 0.00
2026-06-02 13D/A IOBTQ / IO Biotech, Inc. Lundbeckfond Invest A/S 21,851,920 27.40
2026-06-01 13D/A QTTB / Q32 Bio Inc. Orbimed Advisors Llc 4,127,987 17.40 83.22
2026-06-01 13D DRMA / Dermata Therapeutics, Inc. Kyri K. Van Hoose 384,352 9.00
2026-05-29 13D/A GRTX / Galera Therapeutics, Inc. Emerald Bioventures, LLC 61,029,978 30.20 51.75
2026-05-28 13D/A QTTB / Q32 Bio Inc. Atlas Venture Fund X, L.P. 864,261 3.60 0.00
2026-05-28 13D/A RANI / Rani Therapeutics Holdings, Inc. Samsara BioCapital, L.P. 11,322,961 9.90 14.58
2026-05-27 13D/A ASMB / Assembly Biosciences, Inc. Gilead Sciences Inc 4,977,089 25.10 292.21
2026-05-27 13D/A ALXO / ALX Oncology Holdings Inc. LSV Associates, LLC 2,942,525 2.20 -0.24
2026-05-27 13D SDEV / Stablecoin Development Corporation Sky Frontier Foundation 3,009,502 9.90
2026-05-26 13D/A KNSA / Kiniksa Pharmaceuticals International, plc Baker Bros. Advisors Lp 3,253,341 7.00 3.25
2026-05-22 13D/A PAHC / Phibro Animal Health Corporation BFI Co., LLC 19,552,186 48.20 -0.20
2026-05-21 13D UPC / Universe Pharmaceuticals INC Sununion Holding Group Ltd 87,967 13.58 -99.30
2026-05-21 13D/A KALV / KalVista Pharmaceuticals, Inc. Frazier Life Sciences Public Fund, L.P. 1,249,165 2.30 -63.96
2026-05-20 13D/A IRD / Opus Genetics, Inc. Foundation Fighting Blindness Retinal Degeneration Fund 3,792,171 4.66 -30.95
2026-05-19 13D/A SDEV / Stablecoin Development Corporation Framework Ventures IV L.P. 32,715,086 46.40 47.68
2026-05-19 13D/A SDEV / Stablecoin Development Corporation R01 Fund LP 37,548,058 50.30 42.92
2026-05-19 13D/A NKTX / Nkarta, Inc. New Enterprise Associates 15, L.P. 3,568,781 4.90 0.00
2026-05-18 13D/A WHWK / Whitehawk Therapeutics, Inc. Acuta Capital Partners, Llc 4,843,775 9.00 152.11
2026-05-18 13D/A XOMA / XOMA Royalty Corporation Biotechnology Value Fund L P 7,593,303 43.30 193.14
2026-05-15 13D/A LTRN / Lantern Pharma Inc. Bios Advisors Gp, Llc 571,305 4.48
2026-05-14 13D/A WHWK / Whitehawk Therapeutics, Inc. Avoro Capital Advisors LLC 18,292,675 19.99 53.53
2026-05-14 13D/A NAMS / NewAmsterdam Pharma Company N.V. BCLS Fund III Investments, LP 2,059,896 1.76 -61.69
2026-05-14 13D/A HOWL / Werewolf Therapeutics, Inc. Ra Capital Management, L.p. 6,116,140 12.60 -8.46
2026-05-13 13D/A VRDN / Viridian Therapeutics, Inc. Fairmount Funds Management LLC 17,201,800 14.04 7.34
2026-05-12 13D/A HOWL / Werewolf Therapeutics, Inc. MPM BioVentures 2014, L.P. 1,826,646 3.80 -29.97
2026-05-08 13D/A LXRX / Lexicon Pharmaceuticals, Inc. Invus Global Management, LLC 175,156,062 39.40
2026-05-07 13D/A TRVI / Trevi Therapeutics, Inc. New Enterprise Associates 16, L.P. 15,074,080 10.50 0.00
2026-05-06 13D/A QTTB / Q32 Bio Inc. Orbimed Advisors Llc 2,252,987 13.30 0.00
2026-05-06 13D/A RLYB / Rallybio Corporation 5AM Ventures V, L.P. 0 0.00 -100.00
2026-05-05 13D/A HOWL / Werewolf Therapeutics, Inc. MPM BioVentures 2014, L.P. 2,608,501 5.40 -22.57
2026-05-05 13D/A TRAW / Traws Pharma, Inc. Orbimed Advisors Llc 1,876,198 11.90 146.60
2026-05-01 13D XOMAO / XOMA Royalty Corporation - Preferred Stock Ligand Pharmaceuticals Inc 8,062,678 47.00
2026-05-01 13D CTRVP / Hepion Pharmaceuticals, Inc. - Preferred Stock Gravitas Capital LP 6,250,000 21.46
2026-04-30 13D/A SDEV / Stablecoin Development Corporation R01 Fund LP 26,271,523 52.80
2026-04-30 13D/A SDEV / Stablecoin Development Corporation Framework Ventures IV L.P. 22,152,695 44.50
2026-04-29 13D/A CLYM / Climb Bio, Inc. Ra Capital Management, L.p. 22,631,401 33.00 26.06
2026-04-29 13D/A XOMAO / XOMA Royalty Corporation - Preferred Stock Biotechnology Value Fund L P 2,590,303 21.40
2026-04-29 13D/A INDP / Indaptus Therapeutics, Inc. Yao Yun 41,991,000 37.10 0.00
2026-04-28 13D/A ABUS / Arbutus Biopharma Corporation Whitefort Capital Master Fund, LP 15,794,261 8.00 0.00
2026-04-28 13D QUCY / Quantum Cyber N.V. Lazar David E. 477,000,000 97.40
2026-04-27 13D/A EWTX / Edgewise Therapeutics, Inc. Novo Holdings A/S 5,350,000 4.90 -3.60
2026-04-27 13D GRTX / Galera Therapeutics, Inc. Emerald Bioventures, LLC 40,216,160 26.50
2026-04-23 13D/A PRLD / Prelude Therapeutics Incorporated Orbimed Advisors Llc 12,935,071 16.00 -17.70
2026-04-23 13D/A PAHC / Phibro Animal Health Corporation BFI Co., LLC 19,591,914 48.30 -2.04
2026-04-23 13D/A ACRV / Acrivon Therapeutics, Inc. Ra Capital Management, L.p. 12,284,906 28.80 46.32
2026-04-22 13D PULM / Pulmatrix, Inc. RCM Eos PIPE HOLDINGS, LLC 405,358 9.99
2026-04-22 13D/A PRLD / Prelude Therapeutics Incorporated Baker Bros. Advisors Lp 10,295,301 15.50 0.25
2026-04-22 13D/A CELU / Celularity Inc. Philp & Daniele Barach Family Trust 7,558,665 20.10 150.95