Abivax S.A. - Ordinary Shares, nominal value Euro 0.01 per share (ABVX) Institutional Ownership

13F Institutional Holders and Ownership History from Q4 2023 to Q4 2025

Type / Class
Equity / Ordinary Shares, nominal value Euro 0.01 per share
Symbol
ABVX on Nasdaq
Shares outstanding
78,459,900
Price per share
$113.54
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
56,282,420
Total reported value
$7,602,972,962
% of total 13F portfolios
0.03%
Share change
+3,851,505
Value change
+$630,643,955
Number of holders
242
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Abivax S.A. - Ordinary Shares, nominal value Euro 0.01 per share (ABVX) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
TCG Crossover GP I, LLC 9.1% $603,774,500 7,111,596 Chen Yu 30 Sep 2025
Sofinnova Crossover I 7.7% -19% $863,002,246 -$269,710,200 6,399,478 -24% Sofinnova Crossover I SLP 12 Jan 2026
Invus Global Management, LLC 5% -39% $469,347,122 -$177,185,644 3,922,995 -27% Invus Public Equities, L.P. 31 Dec 2025
Deep Track Capital, LP 4.8% $28,885,195 3,480,144 Deep Track Capital, LP 30 Jun 2025
Venrock Healthcare Capital Partners III, L.P. 0.8% $48,964,292 576,729 Venrock Healthcare Capital Partners III, L.P. 30 Sep 2025

As of 31 Dec 2025, 242 institutional investors reported holding 56,282,420 shares of Abivax S.A. - Ordinary Shares, nominal value Euro 0.01 per share (ABVX). This represents 72% of the company’s total 78,459,900 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Abivax S.A. - Ordinary Shares, nominal value Euro 0.01 per share (ABVX) together control 50% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
TCG Crossover Management, LLC 9.1% 7,111,596 0% 32% $959,034,279
UBS Group AG 5.6% 4,423,906 -0.84% 0.12% $596,585,843
Darwin Global Management, Ltd. 4.1% 3,178,501 +0.44% 8.9% $439,713,828
MORGAN STANLEY 4% 3,151,994 +114% 0.03% $425,062,151
Point72 Asset Management, L.P. 3.1% 2,409,154 -18% 0.51% $324,886,463
Vestal Point Capital, LP 2.4% 1,900,000 +90% 9.4% $256,224,500
Caligan Partners LP 1.9% 1,451,924 0% 18% $195,799,211
Paradigm Biocapital Advisors LP 1.8% 1,417,473 -9.4% 5.1% $191,153,321
FMR LLC 1.7% 1,365,657 -4.5% 0.01% $184,165,674
Cormorant Asset Management, LP 1.7% 1,350,000 -31% 10% $182,054,250
ADAR1 Capital Management, LLC 1.7% 1,317,329 -2.5% 13% $177,648,402
WESTFIELD CAPITAL MANAGEMENT CO LP 1.3% 1,009,966 0.57% $136,198,965
BAKER BROS. ADVISORS LP 1.1% 875,796 0% 0.69% $118,105,470
LORD, ABBETT & CO. LLC 1.1% 849,732 +152% 0.35% $114,591,000
DEUTSCHE BANK AG\ 0.97% 764,899 0.03% $103,154,279
Octagon Capital Advisors LP 0.96% 756,000 -43% 13% $101,950,380
SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.96% 754,836 +2081% 0.14% $101,793,409
MILLENNIUM MANAGEMENT LLC 0.94% 741,060 -33% 0.07% $99,935,646
Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. 0.88% 691,973 -5.4% 8.3% $93,316,019
JANUS HENDERSON GROUP PLC 0.85% 667,761 +88% 0.04% $90,037,554
Eversept Partners, LP 0.84% 657,834 +54% 5% $88,712,204
PRICE T ROWE ASSOCIATES INC /MD/ 0.83% 651,644 +36% 0.01% $87,875,000
Saturn V Capital Management LP 0.83% 649,179 -19% 16% $87,545,034
Artia Global Partners LP 0.77% 600,747 +166% 13% $81,013,737
CITADEL ADVISORS LLC 0.72% 563,747 -17% 0.05% $76,024,102

Institutional Holders of Abivax S.A. - Ordinary Shares, nominal value Euro 0.01 per share (ABVX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 56,282,420 $7,602,972,962 +$630,643,955 $134.86 242
2025 Q3 51,964,814 $4,408,157,076 +$2,126,922,733 $84.90 165
2025 Q2 30,664,346 $234,581,803 -$5,694,979 $7.65 43
2025 Q1 31,761,546 $198,509,815 +$9,164,590 $6.25 46
2024 Q4 29,861,029 $218,582,712 +$7,328,424 $7.32 47
2024 Q3 27,383,884 $312,847,988 -$8,252,199 $11.52 40
2024 Q2 28,098,910 $371,643,391 +$62,450,093 $13.22 38
2024 Q1 23,372,028 $334,151,423 +$31,771,567 $14.30 36
2023 Q4 21,265,859 $227,821,381 +$227,821,381 $10.70 30