DOSSIER · 13F Holders · Q1 2026

MARATHON PETE CORP

9 institutions still hold MARATHON PETE CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 56585A902·9 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$175M
visible holders
Holders
9
filers reporting
Concentration
34.21%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q1 2026

9 institutions reported MARATHON PETE CORP in Q1 2026. IMC-Chicago, LLC leads at 34.2% 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
$60M246K0.02%Q1 2026
02
Garda Capital Partners LP
CIK 0001666905
$41M167K10.60%Q1 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$24M99K0.05%Q1 2026
04
SIMPLEX TRADING, LLC
CIK 0001488542
$17M68K0.01%Q1 2026
05
Optiver Holding B.V.
CIK 0001859606· Market maker
$15M60K0.01%Q1 2026
06
JPMORGAN CHASE & CO
CIK 0000019617
$10M40K0.00%Q1 2026
07
Maven Securities LTD
CIK 0001633046
$5M22K0.10%Q1 2026
08
SG Americas Securities, LLC
CIK 0001313360
$4M78K0.00%Q1 2026
09
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025