Stock Ownership/WDC

WESTERN DIGITAL CORP (WDC): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in WDC · Information Technology. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
45
13F filers
Aggregate Value
$8.5B
Across holders
Last Price
$435.38
2026-08-24
Sector
Information Technology
GICS
Quarterly fund activity21 increased24 reduced2 exited
Full exits: Lighthouse Investment Partners, LLC, Soroban Capital Partners LLC
Institutional Holders of WDC
↗
45 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund2.94M$1.9B22.1%0.7%Reduced+$1.8BQ2 2026
FRED ALGER MANAGEMENT, LLC
CIK 0000003520
Hedge Fund2.21M$1.4B16.6%4.7%Reduced$-2.0BQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund1.90M$1.2B14.3%0.6%Reduced+$255.8MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund916K$585.0M6.9%0.5%Added+$544.7MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund658K$420.2M4.9%0.0%Added$-4.1BQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund537K$343.3M4.0%0.5%Reduced$-388.8MQ2 2026
PRIMECAP MANAGEMENT CO/CA/
CIK 0000763212
Institutional Manager516K$329.9M3.9%0.2%Reduced$-38.8MQ2 2026
Whale Rock Capital Management LLC
CIK 0001387322
Hedge Fund401K$255.9M3.0%2.1%Reduced$-7.2MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund400K$255.7M3.0%0.2%Reduced+$237.7MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund352K$224.8M2.6%0.1%Added+$47.5MQ2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$1.9B· 22.1% of total· 0.7% port· 2.94M sh· +$1.8B QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCReduced
Hedge Fund
$1.4B· 16.6% of total· 4.7% port· 2.21M sh· $-2.0B QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$1.2B· 14.3% of total· 0.6% port· 1.90M sh· +$255.8M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$585.0M· 6.9% of total· 0.5% port· 916K sh· +$544.7M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$420.2M· 4.9% of total· 0.0% port· 658K sh· $-4.1B QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$343.3M· 4.0% of total· 0.5% port· 537K sh· $-388.8M QoQ· Q2 2026
PRIMECAP MANAGEMENT CO/CA/Reduced
Institutional Manager
$329.9M· 3.9% of total· 0.2% port· 516K sh· $-38.8M QoQ· Q2 2026
Whale Rock Capital Management LLCReduced
Hedge Fund
$255.9M· 3.0% of total· 2.1% port· 401K sh· $-7.2M QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$255.7M· 3.0% of total· 0.2% port· 400K sh· +$237.7M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$224.8M· 2.6% of total· 0.1% port· 352K sh· +$47.5M QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Added
Hedge Fund
$196.4M· 2.3% of total· 0.3% port· 307K sh· +$8.8M QoQ· Q2 2026
XN LPReduced
Hedge Fund
$140.0M· 1.6% of total· 3.7% port· 219K sh· $-35.9M QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$128.9M· 1.5% of total· 0.1% port· 202K sh· $-69.1M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCAdded
Hedge Fund
$127.7M· 1.5% of total· 0.5% port· 200K sh· — QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$117.1M· 1.4% of total· 0.1% port· 183K sh· — QoQ· Q2 2026
Bridgewater Associates, LPReduced
Hedge Fund
$110.1M· 1.3% of total· 0.5% port· 172K sh· $-48.9M QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$106.5M· 1.3% of total· 0.2% port· 167K sh· $-128.4M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCReduced
Hedge Fund
$99.9M· 1.2% of total· 0.1% port· 156K sh· $-687.7M QoQ· Q2 2026
Verition Fund Management LLCAdded
Hedge Fund
$59.5M· 0.7% of total· 0.3% port· 93K sh· +$36.4M QoQ· Q2 2026
Holocene Advisors, LPReduced
Hedge Fund
$50.2M· 0.6% of total· 0.1% port· 79K sh· $-436.5M QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDReduced
Hedge Fund
$49.1M· 0.6% of total· 0.2% port· 77K sh· $-98.5M QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$48.1M· 0.6% of total· 0.1% port· 75K sh· $-106.9M QoQ· Q2 2026
Point72 Asset Management, L.P.Reduced
Hedge Fund
$47.0M· 0.6% of total· 0.1% port· 74K sh· $-131.9M QoQ· Q2 2026
TUDOR INVESTMENT CORP ET ALAdded
Hedge Fund
$46.4M· 0.5% of total· 0.1% port· 73K sh· $-8.5M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$41.9M· 0.5% of total· 0.1% port· 66K sh· +$33.4M QoQ· Q2 2026
Rokos Capital Management LLPReduced
Hedge Fund
$38.3M· 0.5% of total· 0.1% port· 60K sh· $-88.4M QoQ· Q2 2026
Clearbridge Investments, LLCAdded
Hedge Fund
$31.8M· 0.4% of total· 0.0% port· 50K sh· — QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$31.0M· 0.4% of total· 0.0% port· 49K sh· +$22.3M QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$22.9M· 0.3% of total· 0.0% port· 36K sh· +$4.5M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCReduced
Hedge Fund
$21.1M· 0.2% of total· 0.1% port· 33K sh· $-51.5M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$20.5M· 0.2% of total· 0.1% port· 32K sh· — QoQ· Q2 2026
PineBridge Investments, L.P.Added
Hedge Fund
$14.4M· 0.2% of total· 0.1% port· 120K sh· +$1.0M QoQ· Q3 2025
Walleye Capital LLCReduced
Hedge Fund
$9.4M· 0.1% of total· 0.0% port· 15K sh· $-15.6M QoQ· Q2 2026
Fisher Asset Management, LLCReduced
Institutional Manager
$5.5M· 0.1% of total· 0.0% port· 9K sh· $-4.1M QoQ· Q2 2026
TCW GROUP INCAdded
Hedge Fund
$3.7M· 0.0% of total· 0.0% port· 6K sh· +$124K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$3.7M· 0.0% of total· 0.4% port· 6K sh· — QoQ· Q2 2026
CAXTON ASSOCIATES LLPAdded
Hedge Fund
$3.1M· 0.0% of total· 0.1% port· 5K sh· +$2.6M QoQ· Q2 2026
Parallax Volatility Advisers, L.P.Reduced
Hedge Fund
$3.0M· 0.0% of total· 0.0% port· 5K sh· +$3.0M QoQ· Q2 2026
Brevan Howard Capital Management LPReduced
Hedge Fund
$2.6M· 0.0% of total· 0.0% port· 4K sh· +$538K QoQ· Q2 2026
MOORE CAPITAL MANAGEMENT, LPAdded
Hedge Fund
$2.0M· 0.0% of total· 0.0% port· 3K sh· +$1.4M QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$1.8M· 0.0% of total· 0.0% port· 3K sh· $-682K QoQ· Q2 2026
MAVERICK CAPITAL LTDAdded
Hedge Fund
$1.2M· 0.0% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
Bridgewater Advisors Inc.Added
Hedge Fund
$810K· 0.0% of total· 0.0% port· 2K sh· +$35K QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCReduced
Hedge Fund
$608K· 0.0% of total· 0.0% port· 952 sh· $-29.2M QoQ· Q2 2026
Pinpoint Asset Management LtdAdded
Hedge Fund
$40· 0.0% of total· 0.0% port· 1 sh· — QoQ· Q1 2025
1–10 of 45
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