DOSSIER · 13F Holders · Q2 2026

WESTERN DIGITAL CORP

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

CUSIP 958102955·9 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$2.0B
visible holders
Holders
9
filers reporting
Concentration
66.26%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

9 institutions reported WESTERN DIGITAL CORP in Q2 2026. IMC-Chicago, LLC leads at 66.3% 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
$1.3B2.1M0.32%Q2 2026
02
NATIONAL BANK OF CANADA /FI/
CIK 0000926171
$240M4K0.17%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$160M257K0.09%Q2 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$157M240K0.01%Q2 2026
05
GROUP ONE TRADING LLC
CIK 0000932540
$112M176K0.16%Q2 2026
06
CMT Capital Markets Trading GmbH
CIK 0001632813
$8M29K0.08%Q1 2026
07
Clal Insurance Enterprises Holdings Ltd
CIK 0001376192
$2M4K0.01%Q1 2026
08
AlphaCore Capital LLC
CIK 0001713662
$247K300.00%Q2 2026
09
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025