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Western Digital

1,170 hedge funds and large institutions have $57.5B invested in Western Digital in 2025 Q4 according to their latest regulatory filings, with 303 funds opening new positions, 407 increasing their positions, 362 reducing their positions, and 70 closing their positions.

New
Increased
Maintained
Reduced
Closed

333% more first-time investments, than exits

New positions opened: 303 | Existing positions closed: 70

39% more capital invested

Capital invested by funds: $41.5B → $57.5B (+$16B)

22% more funds holding

Funds holding: 9601,170 (+210)

12% more repeat investments, than reductions

Existing positions increased: 407 | Existing positions reduced: 362

1.37% less ownership

Funds ownership: 99.16%97.78% (-1.4%)

7% less funds holding in top 10

Funds holding in top 10: 2927 (-2)

43% less call options, than puts

Call options by funds: $2.92B | Put options by funds: $5.17B

Holders
1,170
Holders Change
+210
Holders Change %
+21.88%
% of All Funds
14.24%
Holding in Top 10
27
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-6.9%
% of All Funds
0.33%
New
303
Increased
407
Reduced
362
Closed
70
Calls
$2.92B
Puts
$5.17B
Net Calls
-$2.25B
Net Calls Change
-$1.5B
Name Holding Trade Value Shares
Change
Change in
Stake
Sumitomo Mitsui Trust Group
51
Sumitomo Mitsui Trust Group
Japan
$153M +$12M +79,418 +10%
TA
52
Trivest Advisors
Hong Kong
$151M -$6.82M -45,000 -5%
Wells Fargo
53
Wells Fargo
California
$149M +$9.55M +63,011 +8%
Mitsubishi UFJ Asset Management
54
Mitsubishi UFJ Asset Management
Japan
$141M +$6.99M +46,072 +7%
SCP
55
Soroban Capital Partners
New York
$138M
California Public Employees Retirement System
56
California Public Employees Retirement System
California
$138M +$32.9M +216,898 +37%
Primecap Management
57
Primecap Management
California
$130M -$32.1M -211,530 -22%
LSV Asset Management
58
LSV Asset Management
Illinois
$128M -$116M -766,800 -51%
ACP
59
Atalan Capital Partners
New York
$122M -$61.5M -405,388 -36%
WorldQuant Millennium Advisors
60
WorldQuant Millennium Advisors
New York
$111M -$99M -653,004 -50%
RhumbLine Advisers
61
RhumbLine Advisers
Massachusetts
$109M -$5.11M -33,676 -5%
First Trust Advisors
62
First Trust Advisors
Illinois
$108M +$20.6M +135,885 +28%
ProShare Advisors
63
ProShare Advisors
Maryland
$106M +$80M +527,359 +581%
KBC Group
64
KBC Group
Belgium
$103M +$56.6M +373,199 +167%
Caisse de Depot et Placement du Quebec (CDPQ)
65
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
$102M +$75.7M +499,510 +533%
Envestnet Asset Management
66
Envestnet Asset Management
Illinois
$102M +$1.92M +12,666 +2%
WHCM
67
Wolf Hill Capital Management
Connecticut
$102M -$3.38M -22,261 -4%
Victory Capital Management
68
Victory Capital Management
Texas
$101M +$1.62M +10,669 +2%
California State Teachers Retirement System (CalSTRS)
69
California State Teachers Retirement System (CalSTRS)
California
$93.8M +$4.53M +29,881 +6%
Parnassus Investments
70
Parnassus Investments
California
$90.2M -$56.9M -375,363 -42%
Squarepoint
71
Squarepoint
New York
$90M -$928K -6,123 -1%
Mackenzie Financial
72
Mackenzie Financial
Ontario, Canada
$88.4M +$29.7M +195,574 +64%
GAM
73
Gotham Asset Management
New York
$87.3M -$3.79M -24,980 -5%
SEI Investments
74
SEI Investments
Pennsylvania
$81.2M +$1.72M +11,323 +2%
Neuberger Berman Group
75
Neuberger Berman Group
New York
$73.4M -$143M -942,602 -69%