Seagate Technology Holdings plc
DE ˙ DB ˙ IE00BKVD2N49
802,00 € ↓ -10,00 (-1,23%)
2026-06-04
PREZZO DELLE AZIONI
SecurityDE:847 / Seagate Technology Holdings plc
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership967,528 shares
Latest Disclosed Value $ 378,985,003
Janus Henderson Group Plc reports 3,872.12% increase in ownership of 847 / Seagate Technology Holdings plc

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 967,528 shares of Seagate Technology Holdings plc (DE:847) valued at $324,121,880 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 24,358 shares of Seagate Technology Holdings plc. This represents a change in shares of 3,872.12% during the quarter. The current value of the position is $775,957,456 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)
2026-05-18 2026-03-31 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 967,528 943,170 3,872.12 378,985 5,552.27 0.1810
2026-05-15 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 967,528 943,170 378,985 0.0703
2026-02-17 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 24,358 -264 -1.07 6,706 15.36 0.0030
2025-11-14 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 24,622 1,400 6.03 5,812 73.49 0.0027
2025-08-14 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 23,222 -652,964 -96.57 3,351 -94.17 0.0016
2025-05-15 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 676,186 5,210 0.78 57,418 -0.88 0.0315
2025-02-14 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 670,976 648,257 2,853.37 57,925 2,228.18 0.0294
2024-11-14 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 22,719 0 0.00 2,488 6.10 0.0013
2024-08-14 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 22,719 -4,212 -15.64 2,346 -6.39 0.0013
2024-05-15 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 26,931 4 0.01 2,506 8.96 0.0014
2024-02-14 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 26,927 208 0.78 2,300 30.48 0.0014
2023-11-14 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 26,719 -1,850 -6.48 1,763 -0.23 0.0012
2023-08-14 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 28,569 -1,741 -5.74 1,767 -11.83 0.0011
2023-05-15 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 30,310 -13,188 -30.32 2,004 -12.46 0.0013
2023-02-14 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 43,498 18,018 70.71 2,288 68.73 0.0016
2023-01-13 2022-09-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 25,480 -15 -0.06 1,356 -25.58 0.0010
2022-11-14 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 25,480 -15 1,356 0.0010
2022-08-15 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 25,495 -1,152,057 -97.83 1,822 -98.28 0.0013
2022-05-16 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,177,552 209,872 21.69 105,861 -3.17 0.0511
2022-02-14 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 967,680 -849,035 -46.73 109,328 -27.07 0.0456
2021-11-16 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,816,715 -346,509 -16.02 149,916 -21.19 0.0656
2021-08-16 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,163,224 104,008 5.05 190,213 20.35 0.0814
2021-05-17 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 2,059,216 112,427 5.77 158,045 30.60 0.0722
2021-02-16 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 1,946,789 -298,330 -13.29 121,012 9.40 0.0562
2020-11-16 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 2,245,119 723,877 47.58 110,617 50.21 0.0577
2020-08-14 2020-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,521,242 126,661 9.08 73,642 8.21 0.0413
2020-05-14 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 1,394,581 696,642 99.81 68,056 63.88 0.0468
2020-02-18 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 697,939 374,749 115.95 41,527 138.88 0.0213
2019-11-14 2019-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 323,190 -82,757 -20.39 17,384 -9.12 0.0094
2019-07-31 2019-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 405,947 -60,233 -12.92 19,129 -14.32 0.0104
2019-04-30 2019-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 466,180 -531,296 -53.26 22,326 -42.00 0.0124
2019-02-06 2018-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 997,476 -708,623 -41.53 38,495 -52.35 0.0246
2018-11-09 2018-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,706,099 1,267,870 289.32 80,783 226.45 0.0432
2018-08-10 2018-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 438,229 361,446 470.74 24,746 450.89 0.0141
2018-05-14 2018-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 76,783 -105,233 -57.82 4,492 -41.02 0.0026
2018-03-12 2017-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 182,016 -1,643,226 -90.03 7,616 -87.42 0.0047
2018-02-09 2017-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 182,016 -1,643,226 7,616
2017-11-14 2017-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,825,242 -875,705 -32.42 60,544 -42.15 0.0388
2017-08-17 2017-06-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 2,700,947 2,664,861 7,384.75 104,662 6,212.55 0.0713
2017-08-14 2017-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 2,700,947 2,664,861 104,662
2017-05-03 2017-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 36,086 0 0.00 1,658 20.32 0.0116
2017-01-30 2016-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 36,086 3,900 12.12 1,378 11.04 0.0102
2016-10-24 2016-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 32,186 -13,073 -28.88 1,241 12.61 0.0091
2016-07-29 2016-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 45,259 -328,562 -87.89 1,102 -91.44 0.0092
2016-05-12 2016-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 373,821 -26,821 -6.69 12,880 -12.31 0.1045
2016-02-03 2015-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 400,642 3,931 0.99 14,688 -17.34 0.1179
2015-11-16 2015-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 396,711 -10,913 -2.68 17,769 -8.24 0.1565
2015-08-17 2015-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 407,624 -17,958 -4.22 19,364 -12.54 0.1522
2015-06-02 2015-03-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 425,582 -2,633 -0.61 22,141 -22.25 0.1708
2015-05-15 2015-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 425,582 22,141
2015-02-12 2014-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 428,215 -9,553 -2.18 28,476 13.58 0.2053
2014-11-12 2014-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 437,768 9,452 2.21 25,071 3.02 0.2358
2014-08-13 2014-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 428,316 109,366 34.29 24,335 35.84 0.2272
2014-05-08 2014-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 318,950 283,812 807.71 17,914 807.50 0.1744
2014-01-14 2013-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 35,138 0 0.00 1,974 28.43 0.0199
2013-11-12 2013-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 35,138 -2,069 -5.56 1,537 -9.16 0.0170
2013-08-15 2013-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 37,207 37,207 1,692 0.0198
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.