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Western Digital
WDC

Overview Fund Activity

650 hedge funds and large institutions have $14.2B invested in Western Digital in 2025 Q1 according to their latest regulatory filings, with 97 funds opening new positions, 109 increasing their positions, 444 reducing their positions, and 140 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
650
Holders Change
-51
Holders Change %
-7.28%
% of All Funds
8.83%
Holding in Top 10
16
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-15.79%
% of All Funds
0.22%
New
97
Increased
109
Reduced
444
Closed
140
Calls
$953M
Puts
$437M
Net Calls
+$517M
Net Calls Change
-$188M

Top Buyers

1
UBS Group
UBS Group
Switzerland
+$258M
2
Fidelity International
Fidelity International
Bermuda
+$188M
3
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$90.1M
4
Alyeska Investment Group
Alyeska Investment Group
Illinois
+$86.4M
5
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board
Ontario, Canada
+$50.9M

Top Sellers

1
Vanguard Group
Vanguard Group
Pennsylvania
-$535M
2
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
-$446M
3
BlackRock
BlackRock
New York
-$299M
4
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
-$261M
5
State Street
State Street
Massachusetts
-$189M
Name Holding Trade Value Shares
Change 		Shares
Change %
PSC
176
Portman Square Capital
United Kingdom
$4.3M -$1.87M -46,259 -30%
SOMRS
177
State of Michigan Retirement System
Michigan
$4.25M -$1.35M -33,304 -24%
STB
178
S&T Bank
Pennsylvania
$4.16M -$1.4M -34,607 -25%
JGUA
179
John G. Ullman & Associates
New York
$4.07M -$932K -23,056 -19%
ASRS
180
Arizona State Retirement System
Arizona
$4.04M -$1.33M -32,848 -25%
VOYA Investment Management
181
VOYA Investment Management
Georgia
$4.01M -$1.28M -31,579 -24%
Rafferty Asset Management
182
Rafferty Asset Management
New York
$3.98M -$2.53M -62,489 -39%
Zurich Cantonal Bank
183
Zurich Cantonal Bank
Switzerland
$3.96M -$1.58M -39,104 -29%
Cerity Partners
184
Cerity Partners
New York
$3.93M -$1.16M -28,580 -23%
CIBC World Market
185
CIBC World Market
Ontario, Canada
$3.92M +$1.88M +46,490 +92%
KAM
186
Knightsbridge Asset Management
California
$3.88M +$3.88M +96,008 New
Handelsbanken Fonder
187
Handelsbanken Fonder
Sweden
$3.87M -$1.45M -35,772 -27%
UM
188
UniSuper Management
Australia
$3.8M -$433K -10,717 -10%
SEI Investments
189
SEI Investments
Pennsylvania
$3.73M -$3.03M -75,029 -45%
Parallax Volatility Advisers
190
Parallax Volatility Advisers
California
$3.71M +$509K +12,598 +16%
HT
191
HAP Trading
New York
$3.71M -$308K -7,629 -8%
ProShare Advisors
192
ProShare Advisors
Maryland
$3.67M -$870K -21,512 -19%
MIM
193
MetLife Investment Management
New Jersey
$3.65M -$1.24M -30,751 -25%
SMDAM
194
Sumitomo Mitsui DS Asset Management
Japan
$3.61M -$860K -21,270 -19%
Nisa Investment Advisors
195
Nisa Investment Advisors
Missouri
$3.5M -$1.22M -30,172 -26%
RR
196
Robotti Robert
$3.5M -$970K -23,980 -22%
Commonwealth Equity Services
197
Commonwealth Equity Services
Massachusetts
$3.49M +$2.95M +73,083 +549%
Millennium Management
198
Millennium Management
New York
$3.46M -$57.1M -1,412,168 -94%
CIBC Private Wealth Group
199
CIBC Private Wealth Group
Georgia
$3.43M +$3.37M +106,830 +5,831%
MHIP
200
Mountain Hill Investment Partners
New Jersey
$3.35M -$944K -23,350 -22%
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