13F Insight
DOSSIER · 13F Holders · Q2 2026
WDC 3 11/15/28

WESTERN DIGITAL CORP

68 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 958102AT2·68 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$11.9B
visible holders
Holders
68
filers reporting
Concentration
12.55%
TWO SIGMA INVESTMENTS, LP #1
top holder share
AI Holders Summary · Q2 2026

68 institutions reported WDC 3 11/15/28 in Q2 2026. TWO SIGMA INVESTMENTS, LP leads at 12.6% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$1.5B89.0M1.08%Q2 202602
CAPSTONE INVESTMENT ADVISORS, LLC
CIK 0001426196
$1.4B80.5M2.51%Q2 202603
Aequim Alternative Investments LP
CIK 0001728201
$1.0B60.5M15.90%Q2 202604
BANK OF NOVA SCOTIA
CIK 0000009631
$987M58.3M1.49%Q2 202605
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$980M58.0M0.35%Q2 202606
Calamos Advisors LLC
CIK 0001316507
$825M48.7M2.74%Q2 202607
BOUSSARD & GAVAUDAN GESTION SAS
CIK 0001569001
$752M45K37.75%Q2 202608
D. E. Shaw & Co., Inc.
CIK 0001009207
$709M154.4M0.39%Q4 202509
VOYA INVESTMENT MANAGEMENT LLC
CIK 0001068837
$686M40.7M0.59%Q2 202610
BANK OF MONTREAL /CAN/
CIK 0000927971
$656M38.8M0.22%Q2 202611
Elequin Capital, LP
CIK 0001810873
$587M34.8M17.48%Q2 202612
STATE STREET CORP
CIK 0000093751
$320M18.9M0.01%Q2 202613
NOMURA HOLDINGS INC
CIK 0001163653
$305M477K0.36%Q2 202614
FMR LLC
CIK 0000315066
$248M14.7M0.01%Q2 202615
BlackRock, Inc.
CIK 0002012383
$244M14.5M0.00%Q2 202616
Boussard & Gavaudan Investment Management LLP
CIK 0001614986
$186M27K17.57%Q1 202617
Alberta Investment Management Corp
CIK 0001463559· Sovereign
$169M10.0M0.95%Q2 202618
MACKAY SHIELDS LLC
CIK 0000061227
$151M9.0M5.05%Q2 202619
SG Americas Securities, LLC
CIK 0001313360
$128M180K0.14%Q1 202620
JPMORGAN CHASE & CO
CIK 0000019617
$123M7.2M0.01%Q2 2026
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