DOSSIER · 13F Holders · Q3 2026

UNION PAC CORP

7 institutions still hold UNION PAC CORP as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 907818958·7 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$137M
visible holders
Holders
7
filers reporting
Concentration
55.04%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

7 institutions reported UNION PAC CORP in Q3 2026. IMC-Chicago, LLC leads at 55.0% 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
$75M276K0.02%Q3 2026
02
JPMORGAN CHASE & CO
CIK 0000019617
$45M166K0.00%Q2 2026
03
HRT FINANCIAL LP
CIK 0001475597
$6M25K0.02%Q4 2025
04
SIMPLEX TRADING, LLC
CIK 0001488542
$6M21K0.00%Q3 2026
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
$00—Q2 2025