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Jim Simons's Western Digital Corporation (WDC) position

Yes: as of Q1 2026, Jim Simons holds 1.1M shares of WDC worth $310M (0.5% of the disclosed portfolio). Last quarter the position was increased by 15.5%. First disclosed Q4 2021.
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Current value
$310M
Shares held
1.1M
% of portfolio
0.5%
Est. average buy price (i)
$100.72
Quarter-end price
$270.49

Estimated trade prices

Average price in quarters with purchases
$56.90
Average prices in quarters with sales
  • Q4 2025: $151.19 (156K shares sold)
  • Q1 2025: $47.43 (842K shares sold)
  • Q4 2024: $50.25 (306K shares sold)
  • Q1 2024: $43.78 (147K shares sold)
  • Q4 2022: $26.37 (10K shares sold)

WDC price vs Simons's position

1Y 3Y 5Y MAX
Dates
$20$500$1,00020222023202420252026New position of 266K shares · Q4 2021. Average closing price $43.44 · Price range $39.51–$49.97266KsharespurchasedAdded 1.2M shares (445.6%) · Q1 2022. Average closing price $41.04 · Price range $33.60–$51.101.2MsharespurchasedNew position of 114K shares · Q3 2022. Average closing price $33.19 · Price range $24.32–$38.29114KsharespurchasedSold 10K shares (8.4%) · Q4 2022. Average closing price $26.37 · Price range $22.83–$30.0410KsharessoldAdded 366K shares (350.6%) · Q1 2023. Average closing price $29.33 · Price range $23.73–$33.98366KsharespurchasedNew position of 487K shares · Q4 2023. Average closing price $34.99 · Price range $28.91–$40.00487KsharespurchasedSold 147K shares (30.2%) · Q1 2024. Average closing price $43.78 · Price range $37.35–$51.56147KsharessoldNew position of 1.2M shares · Q3 2024. Average closing price $50.51 · Price range $42.50–$60.631.2MsharespurchasedSold 306K shares (25.1%) · Q4 2024. Average closing price $50.25 · Price range $45.05–$55.49306KsharessoldSold 842K shares (92.3%) · Q1 2025. Average closing price $47.43 · Price range $40.43–$54.43842KsharessoldAdded 132K shares (188.6%) · Q2 2025. Average closing price $47.61 · Price range $30.54–$63.99132KsharespurchasedAdded 947K shares (469.2%) · Q3 2025. Average closing price $81.71 · Price range $63.84–$120.06947KsharespurchasedSold 156K shares (13.6%) · Q4 2025. Average closing price $151.19 · Price range $113.13–$180.16156KsharessoldAdded 154K shares (15.5%) · Q1 2026. Average closing price $261.18 · Price range $184.81–$316.93154Ksharespurchased
Average closing price · filing quarter
$261.18
Price range · filing quarter
$184.81 – $316.93
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +154K +$40M +15.5% 1.1M May 14, 2026
Q4 2025 Reduced −156K −$24M −13.6% 993K Feb 12, 2026
Q3 2025 Added +947K +$77M +469.2% 1.1M Nov 13, 2025
Q2 2025 Added +132K +$6.3M +188.6% 202K Aug 13, 2025
Q1 2025 Reduced −842K −$40M −92.3% 70K May 14, 2025
Q4 2024 Reduced −306K −$15M −25.1% 912K Feb 13, 2025
Q3 2024 New +1.2M +$62M – 1.2M Nov 13, 2024
Q1 2024 Reduced −147K −$6.4M −30.2% 340K May 13, 2024
Q4 2023 New +487K +$17M – 487K Feb 13, 2024
Q1 2023 Added +366K +$11M +350.6% 471K May 12, 2023
Q4 2022 Reduced −10K −$253K −8.4% 104K Feb 13, 2023
Q3 2022 New +114K +$3.8M – 114K Nov 14, 2022
Q1 2022 Added +1.2M +$49M +445.6% 1.5M May 13, 2022
Q4 2021 New +266K +$12M – 266K Feb 11, 2022
Data through Q1 2026 · filed May 14, 2026
14 grouped rows from 14 quarters

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Common questions

Does Jim Simons own WDC?

Yes. As of Q1 2026, Jim Simons disclosed 1.1M shares of WDC, worth $310M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jim Simons buy WDC?

Jim Simons first disclosed a WDC position in Q4 2021; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Jim Simons sell WDC?

The quarter-by-quarter table above shows each sale and reduction Jim Simons disclosed in WDC. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of WDC does Jim Simons own?

Jim Simons disclosed 1.1M shares of WDC as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Jim Simons pay for WDC?

Jim Simons's estimated average buy price for WDC is $100.72, from quarter-average prices weighted by the shares added each quarter. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.