Who owns Abivax S.A.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ABVX from SEC Form 13F filings across 302 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 302 institutions disclosed 54.9M shares of Abivax S.A. worth $7.17B — about 58.6% of shares outstanding; the largest disclosed holder is TCG Crossover Management, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
302
13F holders
$7.17B
value, 2026 filers
58.6%
of shares outstanding (54.9M sh)
93
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ABVX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | TCG Crossover Management, LLC | 6.0M | $800.6M | 19.2% | 6.4% | -7.3% |
| 2 | Darwin Global Management, Ltd. | 3.6M | $348.2M | 9.3% | 3.9% | +4.4% |
| 3 | Helikon Investments Ltd | 2.8M | $371.4M | 11.1% | 3% | +175.0% |
| 4 | Vestal Point Capital, LP | 2.3M | $313.1M | 7.3% | 2.5% | +56.6% |
| 5 | Jupiter Topco LLCNEW | 1.9M | $255.1M | 0.1% | 2% | new |
| 6 | UBS Group AG | 1.8M | $245.9M | 0.0% | 2% | -59.4% |
| 7 | ADAR1 Capital Management, LLC | 1.8M | $240.5M | 11.0% | 1.9% | +29.5% |
| 8 | Caligan Partners LP | 1.6M | $207.6M | 9.8% | 1.7% | +6.6% |
| 9 | CITADEL ADVISORS LLC | 1.4M | $191.7M | 0.0% | 1.5% | +164.2% |
| 10 | MORGAN STANLEY | 1.4M | $190.9M | 0.0% | 1.5% | -16.0% |
| 11 | WESTFIELD CAPITAL MANAGEMENT CO LP | 1.3M | $174.5M | 0.6% | 1.4% | -1.0% |
| 12 | RA CAPITAL MANAGEMENT, L.P.NEW | 1.1M | $150.9M | 1.3% | 1.2% | new |
| 13 | NORGES BANKNEW | 1.1M | $146.6M | 0.0% | 1.2% | new |
| 14 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.1M | $140.4M | 0.0% | 1.1% | +176.4% |
| 15 | Logos Global Management LP | 1.0M | $136.5M | 5.9% | 1.1% | +51.7% |
| 16 | Octagon Capital Advisors LP | 993,000 | $132.3M | 11.9% | 1.1% | +46.7% |
| 17 | BANK OF AMERICA CORP /DE/ | 971,439 | $129.5M | 0.0% | 1% | +32.0% |
| 18 | Eversept Partners, LP | 913,880 | $121.8M | 6.3% | 1% | -2.2% |
| 19 | GOLDMAN SACHS GROUP INC | 792,712 | $105.6M | 0.0% | 0.8% | +127.3% |
| 20 | Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | 765,332 | $102.0M | 5.6% | 0.8% | -0.1% |
| 21 | Cormorant Asset Management, LP | 675,000 | $90.0M | 4.6% | 0.7% | -11.2% |
| 22 | Boxer Capital Management, LLC | 605,000 | $80.6M | 6.1% | 0.6% | +202.5% |
| 23 | Balyasny Asset Management L.P. | 603,840 | $80.5M | 0.1% | 0.6% | +182.6% |
| 24 | Siren, L.L.C.NEW | 576,000 | $76.8M | 1.6% | 0.6% | new |
| 25 | BlackRock, Inc. | 574,061 | $76.5M | 0.0% | 0.6% | +34.3% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.