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Ken Griffin's Seagate Technology Holdings plc (STX) position

Yes: as of Q1 2026, Ken Griffin holds 111K shares of STX worth $43M (0.0% of the disclosed portfolio). Last quarter the position was reduced by 42.1%. First disclosed Q2 2021.
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Current value
$43M
Shares held
111K
% of portfolio
0.0%
Est. average buy price (i)
$176.13
Quarter-end price
$391.76

Estimated trade prices

Average price in quarters with purchases
$81.07
Average prices in quarters with sales
  • Q1 2026: $382.55 (80K shares sold)
  • Q3 2025: $170.47 (420K shares sold)
  • Q1 2025: $94.51 (370K shares sold)
  • Q4 2024: $100.67 (742K shares sold)
  • Q2 2024: $93.38 (95K shares sold)
  • Q1 2024: $87.94 (2.1M shares sold)
  • Q2 2023: $61.06 (94K shares sold)
  • Q1 2023: $63.65 (361K shares sold)
  • Q3 2022: $72.26 (1.0M shares sold)
  • Q1 2022: $102.36 (235K shares sold)
  • Q3 2021: $87.01 (56K shares sold)

STX price vs Griffin's position

1Y 3Y 5Y MAX
Dates
Sold 420K shares (81.3%) · Q3 2025. Average closing price $170.47 · Price range $142.01–$236.06420KsharessoldAdded 95K shares (98.4%) · Q4 2025. Average closing price $259.96 · Price range $211.63–$307.9995KsharespurchasedSold 80K shares (42.1%) · Q1 2026. Average closing price $382.55 · Price range $280.70–$449.6880Ksharessold← Earlier —8 purchases, 9 sells1005001,0001,5002026
Average closing price · filing quarter
$382.55
Price range · filing quarter
$280.70 – $449.68
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Every quarterly change

Every quarterly change
Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Reduced· Q1 2026 −$31M
Quarter Q1 2026 Shares change −80K Δ Own −42.1% Shares held 111K Filing date May 15, 2026
Q1 2026 Reduced· Q1 2026 −80K −$31M −42.1% 111K May 15, 2026
Added· Q4 2025 +$25M
Quarter Q4 2025 Shares change +95K Δ Own +98.4% Shares held 191K Filing date Feb 17, 2026
Q4 2025 Added· Q4 2025 +95K +$25M +98.4% 191K Feb 17, 2026
Reduced· Q3 2025 −$72M
Quarter Q3 2025 Shares change −420K Δ Own −81.3% Shares held 96K Filing date Nov 14, 2025
Q3 2025 Reduced· Q3 2025 −420K −$72M −81.3% 96K Nov 14, 2025
Added· Q2 2025 +$29M
Quarter Q2 2025 Shares change +280K Δ Own +118.5% Shares held 516K Filing date Aug 14, 2025
Q2 2025 Added· Q2 2025 +280K +$29M +118.5% 516K Aug 14, 2025
Reduced· Q1 2025 −$35M
Quarter Q1 2025 Shares change −370K Δ Own −61.0% Shares held 236K Filing date May 15, 2025
Q1 2025 Reduced· Q1 2025 −370K −$35M −61.0% 236K May 15, 2025
Reduced· Q4 2024 −$75M
Quarter Q4 2024 Shares change −742K Δ Own −55.0% Shares held 606K Filing date Feb 14, 2025
Q4 2024 Reduced· Q4 2024 −742K −$75M −55.0% 606K Feb 14, 2025
Added· Q3 2024 +$55M
Quarter Q3 2024 Shares change +541K Δ Own +67.1% Shares held 1.3M Filing date Nov 14, 2024
Q3 2024 Added· Q3 2024 +541K +$55M +67.1% 1.3M Nov 14, 2024
Reduced· Q2 2024 −$8.8M
Quarter Q2 2024 Shares change −95K Δ Own −10.5% Shares held 807K Filing date Aug 14, 2024
Q2 2024 Reduced· Q2 2024 −95K −$8.8M −10.5% 807K Aug 14, 2024
Reduced· Q1 2024 −$183M
Quarter Q1 2024 Shares change −2.1M Δ Own −69.8% Shares held 901K Filing date May 15, 2024
Q1 2024 Reduced· Q1 2024 −2.1M −$183M −69.8% 901K May 15, 2024
Added· Q4 2023 +$62M
Quarter Q4 2023 Shares change +830K Δ Own +38.5% Shares held 3.0M Filing date Feb 14, 2024
Q4 2023 Added· Q4 2023 +830K +$62M +38.5% 3.0M Feb 14, 2024
Added· Q3 2023 +$128M
Quarter Q3 2023 Shares change +2.0M Δ Own +1,135.3% Shares held 2.2M Filing date Nov 14, 2023
Q3 2023 Added· Q3 2023 +2.0M +$128M +1,135.3% 2.2M Nov 14, 2023
Reduced· Q2 2023 −$5.8M
Quarter Q2 2023 Shares change −94K Δ Own −35.1% Shares held 175K Filing date Aug 14, 2023
Q2 2023 Reduced· Q2 2023 −94K −$5.8M −35.1% 175K Aug 14, 2023
Reduced· Q1 2023 −$23M
Quarter Q1 2023 Shares change −361K Δ Own −57.3% Shares held 269K Filing date May 15, 2023
Q1 2023 Reduced· Q1 2023 −361K −$23M −57.3% 269K May 15, 2023
Added· Q4 2022 +$1.1M
Quarter Q4 2022 Shares change +21K Δ Own +3.4% Shares held 629K Filing date Feb 14, 2023
Q4 2022 Added· Q4 2022 +21K +$1.1M +3.4% 629K Feb 14, 2023
Reduced· Q3 2022 −$74M
Quarter Q3 2022 Shares change −1.0M Δ Own −62.8% Shares held 609K Filing date Nov 14, 2022
Q3 2022 Reduced· Q3 2022 −1.0M −$74M −62.8% 609K Nov 14, 2022
Data through Q1 2026 · filed May 15, 2026
15 of 20

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Common questions

Does Ken Griffin own STX?

Yes. As of Q1 2026, Ken Griffin disclosed 111K shares of STX, worth $43M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy STX?

Ken Griffin first disclosed a STX position in Q2 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 Ken Griffin sell STX?

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

How many shares of STX does Ken Griffin own?

Ken Griffin disclosed 111K shares of STX as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for STX?

Ken Griffin's estimated average buy price for STX is $176.13, 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.