WESTERN DIGITAL CORP (WDC) Institutional Ownership Changes & 13F Activity

WESTERN DIGITAL CORP (WDC). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC, Parnassus Endeavor Fund, Sequoia Financial Advisors, Thunderbird Partners, and Viking Global Investors.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCBuy153,6001,146,133$310,017,515
Q1 2026Parnassus Endeavor FundSell-126,695396,802$107,330,973
Q1 2026Sequoia Financial AdvisorsBuy3,03516,684$4,512,763
Q4 2025Parnassus Endeavor FundSell-375,363523,497$90,182,828
Q4 2025Renaissance Technologies LLCSell-156,229992,533$170,983,660
Q4 2025Sequoia Financial AdvisorsBuy6,69413,649$2,351,229
Q3 2025Renaissance Technologies LLCBuy946,9291,148,762$137,920,366
Q3 2025Parnassus Endeavor FundSell-538,761898,860$107,917,132
Q3 2025Sequoia Financial AdvisorsBuy1,3886,955$835,056
Q2 2025Parnassus Endeavor FundSell-1,115,9931,437,621$91,993,368
Q2 2025Renaissance Technologies LLCBuy131,900201,833$12,915,294
Q2 2025Sequoia Financial AdvisorsSell-505,567$356,238
Q1 2025Renaissance Technologies LLCSell-842,20069,933$2,827,391
Q1 2025Thunderbird PartnersSell-496,788280,201$11,328,526
Q1 2025Parnassus Endeavor FundSell-426,4332,553,614$103,242,614
Q4 2024Parnassus Endeavor FundBuy586,9242,980,047$177,700,203
Q4 2024Renaissance Technologies LLCSell-306,100912,133$54,390,491
Q4 2024Sequoia Financial AdvisorsSell-1,4915,617$334,958
Q3 2024Renaissance Technologies LLCBuy878,1001,218,233$83,193,132
Q3 2024Parnassus Endeavor FundBuy89,9592,393,123$163,426,370
Q3 2024Sequoia Financial AdvisorsBuy3,2117,108$485,406
Q2 2024Parnassus Endeavor FundBuy888,2942,303,164$174,510,736
Q2 2024Thunderbird PartnersSell-98,170776,989$58,872,457
Q2 2024Sequoia Financial AdvisorsBuy4333,897$295,277
Q1 2024Renaissance Technologies LLCSell-147,000340,133$23,211
Q1 2024Thunderbird PartnersSell-70,398875,159$59,720,850
Q1 2024Sequoia Financial AdvisorsBuy1,5173,464$236,384
Q4 2023Parnassus Endeavor FundSell-570,9711,414,870$74,096,742
Q4 2023Thunderbird PartnersSell-24,033945,557$49,518,820
Q4 2023Renaissance Technologies LLCBuy16,300487,133$25,511

Frequently asked questions about WDC activity

  • Which institutional owners are buying WDC?

    Institutional owners buying WDC include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in WDC activity?

    "Buy" means an investor increased their reported position in WDC compared to the prior reporting period. This reflects growing exposure to WESTERN DIGITAL CORP (WDC) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in WDC increasing?

    Institutional interest in WDC can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

Related WDC Institutional Insights