Seagate Technology Holdings plc
US ˙ NasdaqGS ˙ IE00BKVD2N49

SecuritySTX / Seagate Technology Holdings plc
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership836,018 shares
Latest Disclosed Value $ 327,195,512
Dimensional Fund Advisors Lp reports 7.01% decrease in ownership of STX / Seagate Technology Holdings plc

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 836,018 shares of Seagate Technology Holdings plc (US:STX) valued at $327,518,412 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 899,066 shares of Seagate Technology Holdings plc. This represents a change in shares of -7.01% during the quarter. The current value of the position is $708,500,174 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 836,018 -63,048 -7.01 327,196 32.13 0.0680
2026-02-12 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 899,066 488 0.05 247,637 16.78 0.0519
2025-11-12 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 898,578 -64,699 -6.72 212,055 52.55 0.0455
2025-08-12 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 963,277 -31,030 -3.12 139,005 64.57 0.0322
2025-05-13 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 994,307 11,658 1.19 84,466 -0.41 0.0210
2025-02-13 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 982,649 9,821 1.01 84,814 -20.40 0.0204
2024-11-07 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 972,828 -46,829 -4.59 106,548 1.18 0.0258
2024-08-09 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,019,657 9,062 0.90 105,306 11.98 0.0275
2024-05-10 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,010,595 -237,864 -19.05 94,036 -11.78 0.0255
2024-02-07 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,248,459 -133,833 -9.68 106,590 16.93 0.0311
2023-11-09 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,382,292 -25,104 -1.78 91,160 4.69 0.0299
2023-08-09 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,407,396 -126,241 -8.23 87,076 -14.12 0.0278
2023-05-12 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,533,637 -60,390 -3.79 101,394 122,061.45 0.0342
2023-02-09 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,594,027 29,540 1.89 84 -99.90 0.0248
2022-11-10 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,564,487 -18,810 -1.19 83,288 -26.37 0.0320
2022-08-12 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,583,297 -3,805 -0.24 113,111 -20.73 0.0406
2022-05-13 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD G7997R103 1,587,102 334 0.02 142,696 -20.41 0.0440
2022-02-09 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD G7997R103 1,586,768 -123,865 -7.24 179,281 27.00 0.0542
2021-11-12 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD G7997R103 1,710,633 -90,842 -5.04 141,168 -10.88 0.0455
2021-08-12 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD G7997R103 1,801,475 -98,326 -5.18 158,401 8.64 0.0502
2021-05-14 2021-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,899,801 19,928 1.06 145,798 24.80 0.0482
2021-03-08 2020-12-31 13F/A-2 SEAGATE TECHNOLOGY CLA G7945M107 1,879,873 94,689 5.30 116,830 32.81 0.0422
2021-02-11 2020-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,879,873 94,689 116,830 42,192.7861
2020-11-12 2020-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,785,184 25,564 1.45 87,968 3.28 0.0373
2020-08-13 2020-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,759,620 79,647 4.74 85,174 3.88 0.0374
2020-05-14 2020-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,679,973 58,419 3.60 81,991 -15.02 0.0427
2020-02-14 2019-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,621,554 -1,352 -0.08 96,481 10.52 0.0352
2019-11-12 2019-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,622,906 22,717 1.42 87,298 15.78 0.0339
2019-08-13 2019-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,600,189 31,557 2.01 75,399 0.39 0.0293
2019-08-12 2019-03-31 13F/A-2 SEAGATE TECHNOLOGY CLA G7945M107 1,568,632 82,006 5.52 75,104 30.91 0.0299
2019-05-10 2019-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,568,632 82,006 75,104
2019-02-26 2018-12-31 13F/A-1 SEAGATE TECHNOLOGY CLA G7945M107 1,486,626 209,084 16.37 57,370 -5.15 0.0260
2019-02-13 2018-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,486,626 209,084 57,370
2018-11-13 2018-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,277,542 -11,004 -0.85 60,485 -16.88 0.0230
2018-08-10 2018-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,288,546 30,933 2.46 72,765 -1.13 0.0290
2018-05-11 2018-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,257,613 -5,831 -0.46 73,596 39.21 0.0307
2018-02-12 2017-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,263,444 1,981 0.16 52,866 26.35 0.0219
2017-11-13 2017-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,261,463 44,588 3.66 41,841 -11.27 0.0183
2017-08-11 2017-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,216,875 53,722 4.62 47,156 -11.75 0.0218
2017-05-12 2017-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,163,153 40,927 3.65 53,432 24.74 0.0255
2017-02-09 2016-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,122,226 37,835 3.49 42,835 2.48 0.0214
2016-11-10 2016-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,084,391 48,971 4.73 41,798 65.73 0.0226
2016-08-09 2016-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 1,035,420 -11,757 -1.12 25,220 -30.09 0.0145
2016-05-13 2016-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,047,177 25,972 2.54 36,073 -3.65 0.0216
2016-02-10 2015-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 1,021,205 35,280 3.58 37,441 -15.20 0.0233
2015-11-13 2015-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 985,925 22,284 2.31 44,150 -3.58 0.0290
2015-08-14 2015-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 963,641 119,688 14.18 45,788 4.27 0.0280
2015-05-14 2015-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 843,953 89,597 11.88 43,915 -12.47 0.0277
2015-02-06 2014-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 754,356 -6,902 -0.91 50,170 15.07 0.0330
2014-11-13 2014-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 761,258 -135,329 -15.09 43,598 -14.42 0.0309
2014-08-08 2014-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 896,587 67,463 8.14 50,944 9.42 0.0354
2014-05-14 2014-03-31 13F SEAGATE TECHNOLOGY CLA G7945M107 829,124 23,251 2.89 46,558 2.87 0.0348
2014-02-12 2013-12-31 13F SEAGATE TECHNOLOGY CLA G7945M107 805,873 -29,887 -3.58 45,260 23.82 0.0353
2013-11-13 2013-09-30 13F SEAGATE TECHNOLOGY CLA G7945M107 835,760 44,047 5.56 36,552 2.99 0.0316
2013-08-15 2013-06-30 13F SEAGATE TECHNOLOGY CLA G7945M107 791,713 791,713 35,492 0.0334
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.