DOSSIER · 13F Holders · Q2 2026

MARATHON PETE CORP

9 institutions still hold MARATHON PETE CORP as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 56585A902·9 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$158M
visible holders
Holders
9
filers reporting
Concentration
55.61%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

9 institutions reported MARATHON PETE CORP in Q2 2026. IMC-Chicago, LLC leads at 55.6% 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
$88M343K0.02%Q2 2026
02
Optiver Holding B.V.
CIK 0001859606· Market maker
$19M76K0.01%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$14M55K0.01%Q2 2026
04
GROUP ONE TRADING LLC
CIK 0000932540
$12M46K0.02%Q2 2026
05
NATIONAL BANK OF CANADA /FI/
CIK 0000926171
$10M3800.01%Q2 2026
06
JPMORGAN CHASE & CO
CIK 0000019617
$8M30K0.00%Q2 2026
07
SG Americas Securities, LLC
CIK 0001313360
$4M78K0.00%Q1 2026
08
Maven Securities LTD
CIK 0001633046
$3M13K0.06%Q2 2026
09
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025