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AFTER HRS · 19:25 ET
Market ClerkRecap
Wed Oct 21 · after hours2 signals today106 insider buys this week · $305.5MCIRO short report next: Oct 31The week ahead

WDC

WESTERN DIGITAL CORP
NASDAQ · TECHNOLOGY · COMPUTER STORAGE DEVICES
378.51
+14.19 +3.89%
USD · close Oct 21

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MKT CAP $136.5BP/E 15.6DIV YIELD 0.13%FCF YIELD 2.57%REV TTM $12.9B +35.7%NET INCOME $9.4B +398.9%NET CASH $527M52W 120.47 – 746.23SEC XBRL · TTM TO Invalid Date

Who holds it

SEC 13F · LATEST QUARTER PER FUND
FundTypeRank in portfolioValueSharesAs of
Renaissance TechnologiesGuru#30$343.3M537K2026-06-30
CPP InvestmentsPension#137$271.6M425K2026-06-30
Caisse de dépôt (CDPQ)Pension#90$170.4M267K2026-06-30
Bridgewater Associates (Ray Dalio)Guru#33$110.1M172K2026-06-30
PSP InvestmentsPension#110$50.4M79K2026-06-30

13F filings cover US-listed holdings and arrive up to 45 days after quarter end, so positions may have changed since.

Stakes of 5% or more

SCHEDULE 13D / 13G · LATEST PER HOLDER · TWO YEARS
No 13D or 13G filing on WDC in the last two years from the filings we read (13G only for companies we track; the sweep began Sep 2026).

A 13D means the holder crossed 5% with intent beyond passive ownership and had to state a purpose; a 13G is the passive version. Every new 13D on tracked companies.

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