DOSSIER · 13F Holders · Q3 2026

SOUTHWEST AIRLS CO

5 institutions still hold SOUTHWEST AIRLS CO as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 844741958·5 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$55M
visible holders
Holders
5
filers reporting
Concentration
52.12%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

5 institutions reported SOUTHWEST AIRLS CO in Q3 2026. IMC-Chicago, LLC leads at 52.1% 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
$29M689K0.01%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$13M319K0.02%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$12M284K0.01%Q3 2026
04
CMT Capital Markets Trading GmbH
CIK 0001632813
$1M33K0.01%Q1 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025