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. 74.3% of the shares are freely tradable; institutional investors hold 70.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| TCG Crossover Management, LLC | 6.88 | 6,007,834 | -7.3 | 06/30/2026 |
| 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 |
| Vestal Point Capital LP | 2.69 | 2,349,443 | +56.6 | 06/30/2026 |
| Jupiter Topco LLC | 2.19 | 1,913,933 | +0.0 | 06/30/2026 |
| UBS Group AG | 2.11 | 1,844,918 | -59.4 | 06/30/2026 |
| ADAR1 Capital Management LLC | 2.07 | 1,804,703 | +29.5 | 06/30/2026 |
| Caligan Partners LP | 1.79 | 1,557,924 | +6.6 | 06/30/2026 |
| Citadel Advisors Llc | 1.65 | 1,438,352 | +164.2 | 06/30/2026 |
| Morgan Stanley - Brokerage Accounts | 1.64 | 1,432,185 | -16.0 | 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: October 30, 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.