Abivax S.A.
Abivax S.A. (ABVX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ABVX · as of Mar 31, 2025
Ownership Breakdown
46
Institutional Holders
▼ 1 vs Q4
$198.51M
Total Inst. Value
▼ $20.07M vs Q4
65.57M
Shares Outstanding
freeFloat 89.77%
31.76M
13F Shares Held
▲ 1.90M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ABVX largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
TCG CROSSOVER MANAGEMENT, LLC pharmaceutical preparations | 6.06M | 9.59% | 9.59% | $37.85B | May 14, 2025 | — held |
DEEP TRACK CAPITAL, LP pharmaceutical preparations | 3.58M | 5.68% | 5.68% | $22.37B | May 15, 2025 | — held |
ADAR1 CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 2.21M | 3.51% | 3.51% | $13.81B | May 15, 2025 | ▲ 696.6K |
CORMORANT ASSET MANAGEMENT, LP pharmaceutical preparations | 2.13M | 3.38% | 3.38% | $13.31B | May 15, 2025 | — held |
GREAT POINT PARTNERS LLC pharmaceutical preparations | 1.64M | 2.60% | 2.60% | $10.24B | May 15, 2025 | ▼ 10.4K |
NANTAHALA CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 1.48M | 2.35% | 2.35% | $9.27B | May 15, 2025 | ▲ 46.9K |
CITADEL ADVISORS LLC pharmaceutical preparations | 1.37M | 2.17% | 2.17% | $8.59B | May 15, 2025 | ▲ 518.2K |
FRANKLIN RESOURCES INC pharmaceutical preparations | 1.37M | 2.17% | 2.17% | $8.57B | May 13, 2025 | ▼ 95.0K |
VR ADVISER, LLC pharmaceutical preparations | 1.35M | 2.13% | 2.13% | $8.41B | May 15, 2025 | — held |
CALIGAN PARTNERS LP pharmaceutical preparations | 1.27M | 2.01% | 2.01% | $7.93B | May 15, 2025 | ▲ 517.0K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
19
Increased
+3.24M shares7
New Positions
first time holders11
Decreased
−869.8K shares4
Sold Out
fully exitedNet shares change (top 50)
+2.37M
+3.24M / −869.8K
Net new holders
+11
7 new / 4 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ABVX insider trading · insider activity
Source: SEC Form 4
Recent Insider Transactions
Showing 10 most recent · Common Stock only
No recent insider transactions reported.
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Abivax S.A. (ABVX) is primarily owned by institutional investors, who hold approximately 48.4% of total shares outstanding. Company insiders own approximately 10.23%, while retail and public investors account for the remaining 41.32%.
The largest institutional shareholder of Abivax S.A. is TCG CROSSOVER MANAGEMENT, LLC, holding approximately 6.06 million shares — equal to 9.59% of outstanding shares — as of March 31, 2025.
A total of 46 institutional investors currently hold ABVX stock, with a combined institutional value of approximately $198,510,053 as of the most recent 13F filing period.
Frequently asked questions
ABVX ownershipAbivax S.A. (ABVX) is primarily owned by institutional investors, who hold approximately 48.4% of shares. The largest shareholder is TCG CROSSOVER MANAGEMENT, LLC with a 9.59% stake. Company insiders hold 10.23%. Data sourced from SEC Form 13F as of March 31, 2025.