DOSSIER · 13F Holders · Q1 2026Technology · Computer Storage Devices
WDC

WESTERN DIGITAL CORP

1,607 institutions still hold WESTERN DIGITAL CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 958102105·Computer Storage Devices·1,607 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$66.1B
visible holders
Holders
1,607
filers reporting
Concentration
14.63%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

Western Digital's Q2 2026 tracked ownership is led by two near-equal advisory positions: MassMutual Private Wealth & Trust holds about .13M, roughly 40% of the .81M snapshot, and Versant Capital Management holds about 38%, with Eastern Bank near 13% and Hilltop National Bank near 9%. The quarter's split is that MassMutual and Versant reduced shares, while Eastern Bank increased from 300 to 550 and Hilltop from 337 to 386, shifting incremental ownership toward the secondary holders.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$9.7B35.8M0.17%Q1 2026
02
FMR LLC
CIK 0000315066
$8.6B31.6M0.45%Q1 2026
03
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$6.0B22.0M0.15%Q1 2026
04
Vanguard Portfolio Management
CIK 0002100121· Index
$4.6B17.2M0.24%Q1 2026
05
JPMORGAN CHASE & CO
CIK 0000019617
$4.4B17.5M0.28%Q1 2026
06
STATE STREET CORP
CIK 0000093751
$4.2B15.5M0.14%Q1 2026
07
Invesco Ltd.
CIK 0000914208
$3.4B12.7M0.34%Q1 2026
08
Capital World Investors
CIK 0001422849
$3.2B11.9M0.44%Q1 2026
09
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$2.6B9.5M0.16%Q1 2026
10
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$2.5B9.1M0.28%Q1 2026
11
BANK OF AMERICA CORP /DE/
CIK 0000070858
$2.3B8.5M0.17%Q1 2026
12
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$2.2B8.2M0.29%Q1 2026
13
MORGAN STANLEY
CIK 0000895421
$2.1B7.9M0.13%Q1 2026
14
CITADEL ADVISORS LLC
CIK 0001423053
$1.7B10.2M0.26%Q4 2025
15
WCM INVESTMENT MANAGEMENT, LLC
CIK 0001061186
$1.7B6.6M3.77%Q1 2026
16
GOLDMAN SACHS GROUP INC
CIK 0000886982
$1.6B6.0M0.19%Q1 2026
17
AMERIPRISE FINANCIAL INC
CIK 0000820027
$1.6B5.8M0.36%Q1 2026
18
WELLS FARGO & COMPANY/MN
CIK 0000072971
$1.4B5.1M0.26%Q1 2026
19
UBS Group AG
CIK 0001610520
$1.3B4.7M0.19%Q1 2026
20
D. E. Shaw & Co., Inc.
CIK 0001009207
$1.2B6.9M0.65%Q4 2025
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Insiders at WESTERN DIGITAL CORP
Tregillis Cynthia LDavis Brian ScottTan IrvingAlexy KimberlyDas ManuvirCole Martin IDoluca TuncFeller Brad