DOSSIER · 13F Holders · Q2 2026

UNION PAC CORP

7 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 907818958·7 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$126M
visible holders
Holders
7
filers reporting
Concentration
49.36%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

7 institutions reported UNION PAC CORP in Q2 2026. IMC-Chicago, LLC leads at 49.4% 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
$62M228K0.01%Q2 2026
02
JPMORGAN CHASE & CO
CIK 0000019617
$45M166K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$8M29K0.00%Q2 2026
04
HRT FINANCIAL LP
CIK 0001475597
$6M25K0.02%Q4 2025
05
GROUP ONE TRADING LLC
CIK 0000932540
$5M18K0.01%Q2 2026
06
SG Americas Securities, LLC
CIK 0001313360
$40K19K0.00%Q1 2026
07
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025