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Western Digital
WDC

960 hedge funds and large institutions have $41.5B invested in Western Digital in 2025 Q3 according to their latest regulatory filings, with 288 funds opening new positions, 352 increasing their positions, 235 reducing their positions, and 68 closing their positions.

New
Increased
Maintained
Reduced
Closed

324% more first-time investments, than exits

New positions opened: 288 | Existing positions closed: 68

78% more capital invested

Capital invested by funds: $23.4B → $41.5B (+$18.1B)

50% more repeat investments, than reductions

Existing positions increased: 352 | Existing positions reduced: 235

38% more funds holding in top 10

Funds holding in top 10: 21 → 29 (+8)

28% more funds holding

Funds holding: 748 → 960 (+212)

5.51% less ownership

Funds ownership: 104.67% → 99.16% (-5.5%)

25% less call options, than puts

Call options by funds: $2.27B | Put options by funds: $3.02B

Holders
960
Holders Change
+212
Holders Change %
+28.34%
% of All Funds
12.6%
Holding in Top 10
29
Holding in Top 10 Change
+8
Holding in Top 10 Change %
+38.1%
% of All Funds
0.38%
New
288
Increased
352
Reduced
235
Closed
68
Calls
$2.27B
Puts
$3.02B
Net Calls
-$748M
Net Calls Change
-$787M

Top Buyers

Rank Fund Capital Flow
1
WCM Investment Management
WCM Investment Management
California
+$554M
2
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$549M
3
FAM
Fred Alger Management
New York
+$273M
4
PCH
Polar Capital Holdings
United Kingdom
+$151M
5
N
Nuveen
North Carolina
+$96.8M

Top Sellers

Rank Fund Capital Flow
1
Fidelity International
Fidelity International
Bermuda
-$782M
2
Fidelity Investments
Fidelity Investments
Massachusetts
-$695M
3
SPC
Slate Path Capital
New York
-$378M
4
UBS Group
UBS Group
Switzerland
-$335M
5
DnB Asset Management
DnB Asset Management
Norway
-$321M
Name Holding Trade Value Shares
Change 		Change in
Stake
PBBUPS
976
PKO BP Bankowy Universal Pension Society
Poland
– -$6.46M -101,000 Closed
KC
977
Kintayl Capital
New York
– -$5.66M -88,517 Closed
SCM
978
Soros Capital Management
New York
– -$5.17M -80,800 Closed
HT
979
HAP Trading
New York
– -$6.52M -79,770 Closed
MGP
980
M&G plc
United Kingdom
– -$4.43M -69,213 Closed
SM
981
Sciencast Management
New Jersey
– -$3.13M -48,966 Closed
SC
982
SummitTX Capital
Texas
– -$2.16M -33,679 Closed
SCM
983
Saba Capital Management
New York
– -$2.68M -32,751 Closed
PFU
984
Parus Finance (UK)
United Kingdom
– -$2.06M -32,220 Closed
DC
985
Diametric Capital
Massachusetts
– -$1.79M -27,987 Closed
GDCM
986
Galaxy Digital Capital Management
New York
– -$1.72M -26,830 Closed
SC
987
Shay Capital
New York
– -$1.06M -13,010 Closed
DS
988
DRW Securities
Illinois
– -$747K -11,675 Closed
NICM
989
Neo Ivy Capital Management
New York
– -$639K -9,992 Closed
BCM
990
Bluefin Capital Management
New York
– -$482K -7,533 Closed
IQI
991
Integrated Quantitative Investments
Washington
– -$454K -7,100 Closed
SI
992
Symmetry Investments
Jersey
– -$448K -7,008 Closed
RAM
993
Readystate Asset Management
Illinois
– -$394K -6,155 Closed
NWAG
994
Net Worth Advisory Group
Utah
– -$322K -5,036 Closed
BIG
995
Brooklyn Investment Group
New York
– -$188K -4,589 Closed
EPIM
996
Evelyn Partners Investment Management
– -$284K -4,435 Closed
SCP
997
Sender Company & Partners
New York
– -$354K -4,332 Closed
CCMT
998
CMT Capital Markets Trading
Germany
– -$345K -4,220 Closed
SCM
999
Sandler Capital Management
New York
– -$240K -3,750 Closed
IC
1000
Iconiq Capital
California
– -$215K -3,366 Closed
38 39
40
41 42

WDC Hedge Fund Activity: Q3 2025 in Review

960 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Western Digital (WDC) for Q3 2025, worth a combined $41.5B — up 78% from $23.4B a quarter earlier.

Buyers outnumbered sellers: 288 funds opened new WDC positions and 68 closed out — a net gain of 220 holders — while 352 added to existing stakes and 235 trimmed.

The largest buyer was WCM Investment Management, opening a new position worth an estimated $554M. The largest seller was Fidelity International, cutting an estimated $782M.

  • 960 institutional investors held Western Digital (WDC) as of Q3 2025, up from 748 in Q2 2025.
  • Funds reported $41.5B of Western Digital stock for Q3 2025, up 78% quarter-over-quarter.
  • 288 funds opened new Western Digital positions in Q3 2025 and 68 closed out, a net change of +220 holders.
  • The largest Western Digital buyer in Q3 2025 was WCM Investment Management, an estimated $554M added.
  • The largest Western Digital seller in Q3 2025 was Fidelity International, an estimated $782M sold.

Based on aggregated 13F filings for Q3 2025.