ABVX: Abivax SA insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | 13G amendment | TCG Crossover GP I, LLC | 7.00% | SEC | |
| 2026-08-13 | 13G amendment | Invus Public Equities, L.P. | 6.00% | SEC |
Institutional ownership (Q2 2026)
304 institutions reported holding $7.10B of Abivax SA on Form 13F (254 the quarter before). 91 opened a new position and 40 sold out. Shares held by institutions: +10%.
| Largest holders | Shares | Value |
|---|---|---|
| TCG Crossover Management, LLC | 6,007,834 | $800.60M |
| Helikon Investments Ltd | 2,787,131 | $371.41M |
| Darwin Global Management, Ltd. | 3,621,583 | $348.22M |
| Vestal Point Capital, LP | 2,349,443 | $313.09M |
| Jupiter Topco LLC | 1,913,933 | $255.13M |
| UBS Group AG | 1,844,918 | $245.85M |
| ADAR1 Capital Management, LLC | 1,804,703 | $240.49M |
| Caligan Partners LP | 1,557,924 | $207.61M |
| CITADEL ADVISORS LLC | 1,438,352 | $191.67M |
| MORGAN STANLEY | 1,432,185 | $190.85M |
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