Seagate Technology Holdings plc
US ˙ NasdaqGS ˙ IE00BKVD2N49

SecuritySTX / Seagate Technology Holdings plc
InstitutionTd Asset Management Inc
Latest Disclosed Ownership116,579 shares
Latest Disclosed Value $ 45,670,989
Td Asset Management Inc reports 12.97% increase in ownership of STX / Seagate Technology Holdings plc

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 116,579 shares of Seagate Technology Holdings plc (US:STX) valued at $45,670,989 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 103,198 shares of Seagate Technology Holdings plc. This represents a change in shares of 12.97% during the quarter. The current value of the position is $98,797,205 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)
2026-05-11 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 116,579 13,381 12.97 45,671 60.70 0.0198
2026-02-10 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 103,198 11,749 12.85 28,420 31.65 0.0229
2025-11-10 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 91,449 -15,548 -14.53 21,587 39.79 0.0175
2025-07-28 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 106,997 -21,577 -16.78 15,443 41.38 0.0132
2025-05-07 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 128,574 35,557 38.23 10,922 36.05 0.0101
2025-02-11 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 93,017 7,204 8.39 8,028 -13.96 0.0071
2024-11-01 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 85,813 3,792 4.62 9,331 10.17 0.0082
2024-08-02 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 82,021 2,127 2.66 8,470 13.94 0.0079
2024-05-08 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 79,894 1,926 2.47 7,434 11.69 0.0069
2024-02-12 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 77,968 2,898 3.86 6,656 34.46 0.0065
2023-10-27 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 75,070 -43,889 -36.89 4,951 -32.74 0.0060
2023-08-09 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 118,959 -11,971 -9.14 7,360 -14.99 0.0084
2023-05-10 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 130,930 30,658 30.57 8,657 64.11 0.0104
2023-02-07 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 100,272 -21,007 -17.32 5,275 -20.02 0.0065
2022-11-07 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 121,279 -36,522 -23.14 6,595 -41.50 0.0083
2022-08-04 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 157,801 -12,876 -7.54 11,273 -26.53 0.0131
2022-05-10 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 170,677 -6,202 -3.51 15,344 -23.22 0.0091
2022-02-10 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 176,879 -11,480 -6.09 19,984 28.57 0.0167
2021-11-09 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 188,359 18,725 11.04 15,543 4.24 0.0161
2021-08-11 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 169,634 48,564 40.11 14,911 60.47 0.0151
2021-05-14 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 121,070 30,424 33.56 9,292 64.90 0.0104
2021-02-16 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 90,646 7,790 9.40 5,635 38.05 0.0068
2020-11-10 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 82,856 26,526 47.09 4,082 49.69 0.0057
2020-08-13 2020-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 56,330 -2,713 -4.59 2,727 -5.35 0.0039
2020-05-15 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 59,043 -17,505 -22.87 2,881 -36.75 0.0049
2020-02-11 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 76,548 -9,604 -11.15 4,555 -1.70 0.0066
2019-11-07 2019-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 86,152 -22,546 -20.74 4,634 -9.53 0.0071
2019-08-01 2019-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 108,698 -3,396 -3.03 5,122 -4.58 0.0077
2019-05-08 2019-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 112,094 -4,741 -4.06 5,368 19.05 0.0082
2019-02-01 2018-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 116,835 -10,541 -8.28 4,509 -25.24 0.0078
2018-11-01 2018-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 127,376 -5,731 -4.31 6,031 -19.77 0.0089
2018-07-31 2018-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 133,107 285 0.21 7,517 -3.29 0.0115
2018-05-11 2018-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 132,822 793 0.60 7,773 40.71 0.0119
2018-02-02 2017-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 132,029 -1,164,717 -89.82 5,524 -87.16 0.0080
2017-11-09 2017-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,296,746 -53,803 -3.98 43,013 -17.81 0.0645
2017-08-01 2017-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,350,549 -21,573 -1.57 52,334 -16.96 0.0825
2017-05-05 2017-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 1,372,122 -747,385 -35.26 63,021 -22.10 0.1005
2017-02-08 2016-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 2,119,507 -14,271 -0.67 80,901 -1.65 0.1364
2016-11-02 2016-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 2,133,778 1,327,487 164.64 82,258 318.79 0.1423
2016-08-04 2016-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 806,291 -36,051 -4.28 19,642 -32.31 0.0356
2016-05-05 2016-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 842,342 81,618 10.73 29,019 4.06 0.0543
2016-02-04 2015-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 760,724 -7,533 -0.98 27,888 -18.97 0.0553
2015-11-12 2015-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 768,257 -436,131 -36.21 34,418 -39.84 0.0678
2015-08-11 2015-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,204,388 -598,745 -33.21 57,208 -39.02 0.1022
2015-04-28 2015-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 1,803,133 1,803,133 49.71 93,817 63.99 0.1693
2015-01-30 2014-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -1,644,723 -100.00 0 -100.00
2014-11-06 2014-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,644,723 218,000 15.28 94,193 16.19 0.1625
2014-08-12 2014-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,426,723 260,648 22.35 81,067 23.79 0.1381
2014-05-09 2014-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 1,166,075 -352,501 -23.21 65,487 -23.21 0.1191
2014-02-07 2013-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 1,518,576 99,900 7.04 85,283 37.44 0.1593
2013-11-08 2013-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 1,418,676 1,203,518 559.36 62,053 543.30 0.1233
2013-07-24 2013-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 215,158 215,158 9,646 0.0207
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.