Seagate Technology Holdings plc
DE ˙ XTRA ˙ IE00BKVD2N49
38,91 € ↓ -0,56 (-1,41%)
2017-05-15
DEL PRIS
SecurityDE:STT / Seagate Technology Holdings plc
InstitutionBrookstone Capital Management
Latest Disclosed Ownership16,185 shares
Latest Disclosed Value $ 6,340,750
Brookstone Capital Management reports 32.93% increase in ownership of STT / Seagate Technology Holdings plc

On April 16, 2026 - Brookstone Capital Management filed a 13F-HR form disclosing ownership of 16,185 shares of Seagate Technology Holdings plc (DE:STT) valued at $6,340,750 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 15, 2026 disclosing 12,176 shares of Seagate Technology Holdings plc. This represents a change in shares of 32.93% during the quarter. The current value of the position is $629,758 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-16 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 16,185 4,009 32.93 6,341 89.08 0.0725
2026-01-15 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 12,176 2,031 20.02 3,353 40.06 0.0384
2025-10-15 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 10,145 -378 -3.59 2,395 57.71 0.0286
2025-07-30 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 10,523 -1,486 -12.37 1,519 48.82 0.0199
2025-04-29 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 12,009 476 4.13 1,020 2.51 0.0146
2025-01-13 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 11,533 -1,323 -10.29 995 -29.33 0.0145
2024-10-08 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 12,856 1,268 10.94 1,408 15.88 0.0208
2024-07-18 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 11,588 -91 -0.78 1,216 11.88 0.0202
2024-04-15 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 11,679 -23,072 -66.39 1,087 -63.39 0.0194
2024-01-11 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 34,751 -648 -1.83 2,967 25.31 0.0577
2023-10-20 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 35,399 -1,046 -2.87 2,367 7.79 0.0520
2023-07-11 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 36,445 9,128 33.42 2,197 25.13 0.0442
2023-04-19 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 27,317 2,378 9.54 1,755 25.90 0.0342
2023-01-09 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 24,939 24,939 1,394 0.0282
2022-10-13 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 0 -23,850 -100.00 0 -100.00
2022-07-11 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 23,850 23,850 1,786 0.0395
2022-04-12 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 0 -21,732 -100.00 0 -100.00
2022-01-11 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 21,732 -333 -1.51 2,411 37.30 0.0415
2021-11-03 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 22,065 2,754 14.26 1,756 2.75 0.0316
2021-07-14 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 19,311 19,311 1,709 0.0306
2021-04-16 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -13,574 -100.00 0 -100.00
2021-01-13 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 13,574 8,920 191.66 844 268.56 0.0335
2020-10-13 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 4,654 4,654 -65.71 229 -72.87 0.0106
2020-04-14 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -12,626 -100.00 0 -100.00
2020-01-29 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 12,626 -6,428 -33.74 751 -26.73 0.0381
2019-10-18 2019-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 19,054 -29,647 -60.88 1,025 -55.34 0.0557
2019-07-25 2019-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 48,701 48,701 155.59 2,295 123.90 0.1326
2019-02-05 2018-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -92,899 -100.00 0 -100.00
2018-11-05 2018-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 92,899 8,552 10.14 4,399 -7.64 0.3346
2018-08-06 2018-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 84,347 -10,198 -10.79 4,763 -13.92 0.4149
2018-04-23 2018-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 94,545 -37,691 -28.50 5,533 0.00 0.5021
2018-02-07 2017-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 132,236 -31,292 -19.14 5,533 2.01 0.4969
2017-10-31 2017-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 163,528 29,857 22.34 5,424 4.71 0.4911
2017-08-08 2017-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 133,671 7,780 6.18 5,180 -10.41 0.4939
2017-04-28 2017-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 125,891 -1,999 -1.56 5,782 18.44 0.5849
2017-01-12 2016-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 127,890 11,509 9.89 4,882 8.83 0.5361
2016-10-28 2016-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 116,381 -34,136 -22.68 4,486 22.33 0.4941
2016-07-19 2016-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 150,517 67,956 82.31 3,667 29.03 0.4792
2016-04-14 2016-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 82,561 82,561 -45.15 2,842 -22.50 0.4283
2016-01-14 2015-12-31 13F SEAGATE TECHNOLOGY ORD ORD G7945M107 0 -154 -100.00 0 -100.00
2015-10-28 2015-09-30 13F SEAGATE TECHNOLOGY ORD ORD G7945M107 154 -62,589 -99.75 7 -99.77 0.0013
2015-08-11 2015-06-30 13F SEAGATE TECHNOLOGY ORD ORD G7945M107 62,743 15,994 34.21 2,980 22.53 0.3748
2015-05-14 2015-03-31 13F SEAGATE TECHNOLOGY ORD ORD G7945M107 46,749 46,749 -25.49 2,432 -18.39 0.3681
2015-01-29 2014-12-31 13F SEAGATE TECHNOLOGY ORD ORD G7945M107 0 -8,706 -100.00 0 -100.00
2014-10-14 2014-09-30 13F SEAGATE TECHNOLOGY ORD ORD G7945M107 8,706 8,706 499 0.0939
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.