DOSSIER · 13F Holders · Q4 2025

XENON PHARMACEUTICALS INC

5 institutions still hold XENON PHARMACEUTICALS INC as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 98420N905·5 13F holders·last filed Dec 31, 2025
Market cap
13F value held
$9M
visible holders
Holders
5
filers reporting
Concentration
66.98%
HRT FINANCIAL LP #1
top holder share
AI Holders Summary · Q4 2025

5 institutions reported XENON PHARMACEUTICALS INC in Q4 2025. HRT FINANCIAL LP leads at 67.0% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
HRT FINANCIAL LP
CIK 0001475597
$6M130K0.02%Q4 2025
02
GROUP ONE TRADING LLC
CIK 0000932540
$1M24K0.00%Q2 2026
03
IMC-Chicago, LLC
CIK 0001452861· Market maker
$1M20K0.00%Q2 2026
04
SIMPLEX TRADING, LLC
CIK 0001488542
$223K4K0.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025