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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 %
DKCM
651
Davidson Kempner Capital Management
New York
– -$86.4M -1,917,436 Closed
KCM
652
Kodai Capital Management
Illinois
– -$75.7M -1,678,982 Closed
ClearBridge Investments
653
ClearBridge Investments
New York
– -$73.1M -1,620,941 Closed
SC
654
Samlyn Capital
New York
– -$71M -1,574,471 Closed
Qube Research & Technologies (QRT)
655
Qube Research & Technologies (QRT)
United Kingdom
– -$34.1M -756,089 Closed
DFO
656
Duquesne Family Office
New York
– -$24.9M -551,903 Closed
BPAMU
657
BTG Pactual Asset Management US
New York
– -$23.9M -529,200 Closed
TC
658
TwinBeech Capital
New York
– -$22.7M -502,712 Closed
NM
659
NWI Management
New York
– -$21.5M -476,280 Closed
SIM
660
SRS Investment Management
New York
– -$17M -378,162 Closed
CM
661
CastleKnight Management
New York
– -$12.6M -278,756 Closed
RCM
662
Rokos Capital Management
United Kingdom
– -$8.43M -186,958 Closed
PCM
663
Portolan Capital Management
Massachusetts
– -$7.71M -170,991 Closed
ZDA
664
Zweig-DiMenna Associates
New York
– -$7.6M -168,694 Closed
MMA
665
Mizuho Markets Americas
New York
– -$6.99M -155,188 Closed
CM
666
Crestline Management
Texas
– -$6.74M -149,475 Closed
WP
667
Woodline Partners
California
– -$6M -133,107 Closed
OBGC
668
O'Brien Greene & Co
Pennsylvania
– -$5.94M -131,866 Closed
O
669
Ossiam
France
– -$5.92M -131,273 Closed
GCM
670
Greenland Capital Management
New York
– -$5.67M -125,899 Closed
JG
671
Jain Global
New York
– -$4.97M -110,170 Closed
FCM
672
Fieldview Capital Management
Michigan
– -$4.45M -98,796 Closed
EDRH
673
Edmond de Rothschild Holding
Switzerland
– -$4.36M -96,643 Closed
PI
674
PineBridge Investments
New York
– -$4.24M -94,069 Closed
MFS
675
Mirabella Financial Services
United Kingdom
– -$3.48M -77,263 Closed
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