13F Insight
DOSSIER · 13F Holders · Q1 2026Healthcare · Pharmaceutical PreparationsCyclicalNet sold
XENE

XENON PHARMACEUTICALS INC

299 institutions still hold XENON PHARMACEUTICALS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 98420N105·Pharmaceutical Preparations·299 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 3.9%
vs prior quarter
13F value held
$3.5B
68.0% inst. owned
of float
Holders
299
-116 QoQ
filers reporting
Activity
+76 / −34
+983 added · −810 reduced
this quarter
Concentration
17.83%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

299 institutions reported XENE in Q1 2026. FMR LLC leads at 17.8% of the visible book. -116 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$629M10.8M0.03%Q1 202602
Avoro Capital Advisors LLC
CIK 0001633313
$336M5.8M3.31%Q1 202603
BlackRock, Inc.
CIK 0002012383
$328M5.6M0.01%Q1 202604
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$281M4.8M0.05%Q1 202605
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 0000938206
$261M4.5M1.92%Q1 202606
Polar Capital Holdings Plc
CIK 0001837309
$256M4.4M0.91%Q1 202607
JANUS HENDERSON GROUP PLC
CIK 0001274173
$243M4.2M0.12%Q1 202608
Capital International Investors
CIK 0001562230
$156M2.7M0.04%Q1 202609
JPMORGAN CHASE & CO
CIK 0000019617
$107M1.9M0.01%Q1 202610
STATE STREET CORP
CIK 0000093751
$100M1.7M0.00%Q1 202611
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$99M1.7M0.01%Q1 202612
Affinity Asset Advisors, LLC
CIK 0001773195
$97M1.7M5.03%Q1 202613
Holocene Advisors, LP
CIK 0001700574
$88M1.5M0.21%Q1 202614
WESTFIELD CAPITAL MANAGEMENT CO LP
CIK 0001177719
$81M1.4M0.34%Q1 202615
Caligan Partners LP
CIK 0001727492
$81M1.4M5.39%Q1 202616
BNP Paribas Asset Management Holding S.A.
CIK 0001520354
$78M1.3M0.09%Q1 202617
BRAIDWELL LP
CIK 0001920938
$78M1.3M2.60%Q1 202618
Caption Management, LLC
CIK 0001706766
$78M1.3M0.45%Q1 202619
Siren, L.L.C.
CIK 0002005245
$77M1.3M2.13%Q1 202620
FRANKLIN RESOURCES INC
CIK 0000038777
$74M1.3M0.02%Q1 2026
Page 1 of 15
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