Seagate Technology Holdings plc
US ˙ NasdaqGS ˙ IE00BKVD2N49

SecuritySTX / Seagate Technology Holdings plc
InstitutionOssiam
Latest Disclosed Ownership4,540 shares
Latest Disclosed Value $ 1,778,590
Ossiam reports 5.88% increase in ownership of STX / Seagate Technology Holdings plc

On May 14, 2026 - Ossiam filed a 13F-HR form disclosing ownership of 4,540 shares of Seagate Technology Holdings plc (US:STX) valued at $1,778,590 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 4,288 shares of Seagate Technology Holdings plc. This represents a change in shares of 5.88% during the quarter. The current value of the position is $4,270,733 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)
2026-05-14 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,540 252 5.88 1,779 50.68 0.0313
2026-02-13 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,288 3,369 366.59 1,181 446.30 0.0236
2025-11-14 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 919 -704 -43.38 217 -7.69 0.0028
2025-08-13 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,623 1,623 234 0.0026
2025-05-14 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 0 -14,926 -100.00 0 -100.00
2025-02-13 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 14,926 11,143 294.55 1,288 211.11 0.0222
2024-11-13 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,783 -3,019 -44.38 414 -41.03 0.0080
2024-08-13 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 6,802 -2,882 -29.76 702 -22.09 0.0133
2024-05-13 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 9,684 5,440 128.18 901 148.90 0.0158
2024-02-13 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,244 -816 -16.13 362 8.71 0.0058
2023-11-14 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 5,060 3,355 196.77 334 217.14 0.0059
2023-08-11 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,705 823 93.31 105 81.03 0.0019
2023-05-12 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 882 -34,014 -97.47 58 -96.84 0.0012
2023-02-13 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 34,896 4,844 16.12 1,836 14.69 0.0476
2022-11-14 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 30,052 30,052 1,600 0.0463
2022-08-12 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 0 -8,679 -100.00 0 -100.00
2022-05-13 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 8,679 4,323 99.24 780 58.54 0.0204
2022-02-14 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,356 -713 -14.07 492 17.70 0.0129
2021-11-12 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 5,069 0 0.00 418 -6.28 0.0118
2021-08-13 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 5,069 -3,786 -42.76 446 -34.41 0.0121
2021-05-17 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 8,855 4,595 107.86 680 156.60 0.0212
2021-02-12 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 4,260 -32,167 -88.31 265 -85.24 0.0092
2020-11-12 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 36,427 28,524 360.93 1,795 368.67 0.0751
2020-08-13 2020-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 7,903 1,384 21.23 383 20.44 0.0245
2020-05-14 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 6,519 962 17.31 318 -3.93 0.0216
2020-02-14 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 5,557 662 13.52 331 25.86 0.0252
2019-11-13 2019-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 4,895 4,895 263 0.0183
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.