Abivax S.A.
Ownership
Ownership Structure
Who owns Abivax S.A. (ABVX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 79.6% of the shares are freely tradable; institutional investors hold 70.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| TCG Crossover Management, LLC | 6.89 | 6,007,834 | -7.3 | 06/30/2026 |
| UBS Group AG | 5.21 | 4,547,406 | +2.8 | 03/31/2026 |
| Darwin Global Management, Ltd. | 4.15 | 3,621,583 | +4.4 | 06/30/2026 |
| Helikon Investments Ltd | 3.19 | 2,787,131 | +175.0 | 06/30/2026 |
| Morgan Stanley - Brokerage Accounts | 1.95 | 1,704,958 | -45.9 | 03/31/2026 |
| Caligan Partners LP | 1.79 | 1,557,924 | +6.6 | 06/30/2026 |
| Vestal Point Capital LP | 1.72 | 1,500,000 | -21.1 | 03/31/2026 |
| Citadel Advisors Llc | 1.65 | 1,438,352 | +164.2 | 06/30/2026 |
| ADAR1 Capital Management LLC | 1.60 | 1,394,019 | +5.8 | 03/31/2026 |
| Westfield Capital Management Company, L.P. | 1.50 | 1,309,825 | -1.0 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.