DOSSIER · 13F Holders · Q2 2026

DIAMONDBACK ENERGY INC

6 institutions still hold DIAMONDBACK ENERGY INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 25278X909·6 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$137M
visible holders
Holders
6
filers reporting
Concentration
35.28%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q2 2026

6 institutions reported DIAMONDBACK ENERGY INC in Q2 2026. GROUP ONE TRADING LLC leads at 35.3% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
GROUP ONE TRADING LLC
CIK 0000932540
$48M276K0.07%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$39M223K0.01%Q2 2026
03
Optiver Holding B.V.
CIK 0001859606· Market maker
$23M130K0.01%Q2 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$20M111K0.00%Q2 2026
05
SIMPLEX TRADING, LLC
CIK 0001488542
$7M39K0.00%Q2 2026
06
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025