DOSSIER · 13F Holders · Q2 2026

UNION PAC CORP

6 institutions still hold UNION PAC CORP as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 907818908·6 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$165M
visible holders
Holders
6
filers reporting
Concentration
54.36%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

6 institutions reported UNION PAC CORP in Q2 2026. IMC-Chicago, LLC leads at 54.4% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$90M331K0.02%Q2 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$35M128K0.05%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$26M94K0.01%Q2 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$15M54K0.00%Q2 2026
05
HRT FINANCIAL LP
CIK 0001475597
$393K2K0.00%Q4 2025
06
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025