DOSSIER · 13F Holders · Q2 2026

WESTERN UN CO

4 institutions still hold WESTERN UN CO as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 959802959·4 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$4M
visible holders
Holders
4
filers reporting
Concentration
49.52%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q2 2026

4 institutions reported WESTERN UN CO in Q2 2026. GROUP ONE TRADING LLC leads at 49.5% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
GROUP ONE TRADING LLC
CIK 0000932540
$2M256K0.00%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$2M209K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$404K53K0.00%Q2 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025