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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
$30$500$1,000$1,50020192020202120222023202420252026New position of 153K shares · Q2 2021. Average closing price $90.11 · Price range $78.49–$104.23153KsharespurchasedSold 56K shares (36.2%) · Q3 2021. Average closing price $87.01 · Price range $81.57–$94.1356KsharessoldAdded 162K shares (166.1%) · Q4 2021. Average closing price $97.18 · Price range $79.01–$115.00162KsharespurchasedSold 235K shares (90.3%) · Q1 2022. Average closing price $102.36 · Price range $86.35–$116.02235KsharessoldAdded 1.6M shares (over 1,000%) · Q2 2022. Average closing price $81.25 · Price range $70.75–$90.971.6MsharespurchasedSold 1.0M shares (62.8%) · Q3 2022. Average closing price $72.26 · Price range $53.23–$83.611.0MsharessoldAdded 21K shares (3.4%) · Q4 2022. Average closing price $53.16 · Price range $48.49–$58.0021KsharespurchasedSold 361K shares (57.3%) · Q1 2023. Average closing price $63.65 · Price range $51.88–$72.46361KsharessoldSold 94K shares (35.1%) · Q2 2023. Average closing price $61.06 · Price range $55.12–$66.8894KsharessoldAdded 2.0M shares (over 1,000%) · Q3 2023. Average closing price $64.39 · Price range $57.97–$73.702.0MsharespurchasedAdded 830K shares (38.5%) · Q4 2023. Average closing price $74.63 · Price range $65.25–$86.79830KsharespurchasedSold 2.1M shares (69.8%) · Q1 2024. Average closing price $87.94 · Price range $80.11–$98.632.1MsharessoldSold 95K shares (10.5%) · Q2 2024. Average closing price $93.38 · Price range $82.46–$105.9995KsharessoldAdded 541K shares (67.1%) · Q3 2024. Average closing price $102.25 · Price range $92.10–$110.76541KsharespurchasedSold 742K shares (55.0%) · Q4 2024. Average closing price $100.67 · Price range $86.31–$112.64742KsharessoldSold 370K shares (61.0%) · Q1 2025. Average closing price $94.51 · Price range $84.92–$108.42370KsharessoldAdded 280K shares (118.5%) · Q2 2025. Average closing price $103.52 · Price range $66.54–$144.33280KsharespurchasedSold 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
Average closing price · filing quarter
$382.55
Price range · filing quarter
$280.70 – $449.68
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −80K −$31M −42.1% 111K May 15, 2026
Q4 2025 Added +95K +$25M +98.4% 191K Feb 17, 2026
Q3 2025 Reduced −420K −$72M −81.3% 96K Nov 14, 2025
Q2 2025 Added +280K +$29M +118.5% 516K Aug 14, 2025
Q1 2025 Reduced −370K −$35M −61.0% 236K May 15, 2025
Q4 2024 Reduced −742K −$75M −55.0% 606K Feb 14, 2025
Q3 2024 Added +541K +$55M +67.1% 1.3M Nov 14, 2024
Q2 2024 Reduced −95K −$8.8M −10.5% 807K Aug 14, 2024
Q1 2024 Reduced −2.1M −$183M −69.8% 901K May 15, 2024
Q4 2023 Added +830K +$62M +38.5% 3.0M Feb 14, 2024
Q3 2023 Added +2.0M +$128M +1,135.3% 2.2M Nov 14, 2023
Q2 2023 Reduced −94K −$5.8M −35.1% 175K Aug 14, 2023
Q1 2023 Reduced −361K −$23M −57.3% 269K May 15, 2023
Q4 2022 Added +21K +$1.1M +3.4% 629K Feb 14, 2023
Q3 2022 Reduced −1.0M −$74M −62.8% 609K Nov 14, 2022
Q2 2022 Added +1.6M +$131M +6,368.1% 1.6M Aug 15, 2022
Q1 2022 Reduced −235K −$24M −90.3% 25K May 16, 2022
Q4 2021 Added +162K +$16M +166.1% 260K Feb 14, 2022
Q3 2021 Reduced −56K −$4.8M −36.2% 98K Nov 15, 2021
Q2 2021 New +153K +$14M – 153K Aug 16, 2021
Data through Q1 2026 · filed May 15, 2026
20 grouped rows from 20 quarters

More Griffin positions

NVIDIA Corporation(NVDA)
$3.2B
2.3% of portfolio

Amazon.com, Inc.(AMZN)
$1.7B
1.2% of portfolio

Micron Technology, Inc.(MU)
$1.6B
1.1% of portfolio

Taiwan Semiconductor Manufacturing Company Limited(TSM)
$1.4B
1.0% of portfolio

Apple Inc.(AAPL)
$1.3B
0.9% of portfolio

Meta Platforms, Inc.(META)
$1.0B
0.7% of portfolio

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.