13F Insight
DOSSIER · 13F Holders · Q1 2026CyclicalNet sold
ABVX

ABIVAX SA SP ADS

255 institutions still hold ABIVAX SA SP ADS as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 00370m103·255 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 1.9%
vs prior quarter
13F value held
$3.7B
57.0% inst. owned
of float
Holders
255
-80 QoQ
filers reporting
Activity
+82 / −106
+852 added · −782 reduced
this quarter
Concentration
19.58%
TCG Crossover Management, LLC #1
top holder share
AI Holders Summary · Q1 2026

255 institutions reported ABVX in Q1 2026. TCG Crossover Management, LLC leads at 19.6% of the visible book. -80 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
TCG Crossover Management, LLC
CIK 0001839948
$722M6.5M20.65%Q1 202602
UBS Group AG
CIK 0001610520
$506M4.5M0.08%Q1 202603
Darwin Global Management, Ltd.
CIK 0001839209
$352M3.5M9.34%Q1 202604
MORGAN STANLEY
CIK 0000895421
$190M1.7M0.01%Q1 202605
Vestal Point Capital, LP
CIK 0001974915
$167M1.5M4.67%Q1 202606
Caligan Partners LP
CIK 0001727492
$163M1.5M10.83%Q1 202607
ADAR1 Capital Management, LLC
CIK 0001940272
$160M1.4M9.43%Q1 202608
WESTFIELD CAPITAL MANAGEMENT CO LP
CIK 0001177719
$147M1.3M0.62%Q1 202609
CITADEL ADVISORS LLC
CIK 0001423053
$146M1.1M0.02%Q4 202510
FMR LLC
CIK 0000315066
$143M1.3M0.01%Q1 202611
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$143M1.3M0.02%Q1 202612
BAKER BROS. ADVISORS LP
CIK 0001263508
$118M876K0.69%Q4 202513
Helikon Investments Ltd
CIK 0001839497
$113M1.0M4.26%Q1 202614
Eversept Partners, LP
CIK 0001697013
$104M934K5.49%Q1 202615
JANUS HENDERSON GROUP PLC
CIK 0001274173
$98M879K0.05%Q1 202616
Paradigm Biocapital Advisors LP
CIK 0001855655
$86M772K1.76%Q1 202617
Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A.
CIK 0002011081
$85M766K7.23%Q1 202618
Cormorant Asset Management, LP
CIK 0001583977
$85M760K4.25%Q1 202619
BANK OF AMERICA CORP /DE/
CIK 0000070858
$82M736K0.01%Q1 202620
Octagon Capital Advisors LP
CIK 0001839435
$75M677K8.34%Q1 2026
Page 1 of 13
235 more holders available. Log in →