DOSSIER · 13F Holders · Q2 2026

WESTERN DIGITAL CORP

11 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 958102905·11 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$1.3B
visible holders
Holders
11
filers reporting
Concentration
69.68%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

11 institutions reported WESTERN DIGITAL CORP in Q2 2026. IMC-Chicago, LLC leads at 69.7% 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
$904M1.4M0.22%Q2 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$171M268K0.24%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$130M202K0.08%Q2 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$75M115K0.00%Q2 2026
05
HRT FINANCIAL LP
CIK 0001475597
$12M68K0.04%Q4 2025
06
CMT Capital Markets Trading GmbH
CIK 0001632813
$3M12K0.03%Q1 2026
07
Perigon Wealth Management, LLC
CIK 0001575239
$1M2K0.02%Q2 2026
08
Capital Markets Trading UK LLP
CIK 0001719165
$676K3K0.01%Q1 2026
09
AlphaCore Capital LLC
CIK 0001713662
$536K300.01%Q2 2026
10
OSAIC HOLDINGS, INC.
CIK 0001677044
$54K10.00%Q2 2026
11
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025