DOSSIER · 13F Holders · Q2 2026

WESTERN MIDSTREAM PARTNERS L

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

CUSIP 958669903·4 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$16M
visible holders
Holders
4
filers reporting
Concentration
65.67%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

4 institutions reported WESTERN MIDSTREAM PARTNERS L in Q2 2026. IMC-Chicago, LLC leads at 65.7% 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
$10M238K0.00%Q2 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$4M80K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$2M44K0.00%Q2 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025