Abivax S.A. (ABVX) Institutional Ownership

Ownership Summary

The institutional landscape for Abivax S.A. (NASDAQ:ABVX) includes 164 filers as of the latest reporting cycle ending September 2025.

• These investors collectively held 82.3% of the company's total shares outstanding in September 2025, up from 46.4% in June 2025.
• On a quarter-over-quarter basis, institutional holdings shifted by 83.32%, with a year-over-year an increase of 310.00% in the count of filers.
• A review of institutional activity for Abivax shows 140 of 164 filers increasing their positions, while 22 reduced their stake, and 2 remained unchanged.
• The aggregate institutional position in Abivax now stands at 52.19Mn shares as of September 2025, after investors increased their holdings (up by 23.72Mn shares quarter on quarter which is up 24.81Mn shares year over year).
• As of September 30, 2025, TCG Crossover Management, LLC held Abivax's largest shareholding position with over 7.11Mn shares, representing 11.21% of total outstanding shares.
• Among the most significant buyers of Abivax during September 2025 were UBS Group AG (4.29Mn), Darwin Global Management, Ltd. (3.16Mn), Point72 Asset Management, L.P. (2.76Mn), Paradigm Biocapital Advisors LP (1.56Mn), FMR LLC (1.40Mn).
• Leading sellers of Abivax stock in September 2025 included ADAR1 Capital Management, LLC (1.72Mn), GREAT POINT PARTNERS LLC (1.14Mn), Nantahala Capital Management, LLC (925.43K), FRANKLIN RESOURCES INC (854.96K), VR Adviser, LLC (769.05K).
• The top 10 institutional holders of Abivax for the quarter ending September 2025 included TCG Crossover Management, LLC (7.11Mn), UBS Group AG (4.46Mn), Darwin Global Management, Ltd. (3.16Mn), Point72 Asset Management, L.P. (2.93Mn), Cormorant Asset Management, LP (1.95Mn), Paradigm Biocapital Advisors LP (1.56Mn), MORGAN STANLEY (1.47Mn), Caligan Partners LP (1.45Mn), FMR LLC (1.43Mn), ADAR1 Capital Management, LLC (1.35Mn).