Seagate Technology Holdings plc
US ˙ NasdaqGS ˙ IE00BKVD2N49

SecuritySTX / Seagate Technology Holdings plc
InstitutionKBC Group NV
Latest Disclosed Ownership245,061 shares
Latest Disclosed Value $ 96,004
KBC Group NV reports 61.63% decrease in ownership of STX / Seagate Technology Holdings plc

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 245,061 shares of Seagate Technology Holdings plc (US:STX) valued at $96,005,097 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 638,613 shares of Seagate Technology Holdings plc. This represents a change in shares of -61.63% during the quarter. The current value of the position is $230,526,432 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 245,061 -393,552 -61.63 96 -45.14 0.1238
2026-01-26 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 638,613 12,640 2.02 176 19.05 0.4010
2026-01-20 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 625,973 560,925 862.32 148 1,533.33 0.3544
2025-08-08 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 65,048 -845 -1.28 9 80.00 0.0254
2025-04-25 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 65,893 -4,397 -6.26 6 -16.67 0.0174
2025-01-22 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 70,290 42,182 150.07 6 100.00 0.0167
2024-11-06 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 28,108 -461 -1.61 3 50.00 0.0093
2024-07-17 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 28,569 3,934 15.97 3 0.00 0.0089
2024-05-08 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 24,635 2,353 10.56 2 100.00 0.0073
2024-02-13 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 22,282 -1,730 -7.20 2 0.00 0.0067
2024-02-15 2023-09-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 24,012 -8,923 -27.09 2 -50.00 0.0065
2023-11-22 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 32,935 0 2 0.0085
2024-02-15 2023-06-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 32,935 -116,676 -77.99 2 -77.78 0.0084
2023-07-28 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 32,935 -116,676 2 0.0085
2024-02-14 2023-03-31 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 149,611 39,998 36.49 10 80.00 0.0420
2023-05-04 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 149,611 -333,106 10 0.0466
2024-02-14 2022-12-31 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 109,613 -374,583 -77.36 6 -80.00 0.0280
2023-02-13 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 482,717 -1,479 26 0.0001
2024-02-15 2022-09-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 484,196 -392,635 -44.78 26 -59.68 0.1339
2022-11-08 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 482,717 -394,114 25,695 0.1343
2024-02-14 2022-06-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 876,831 -35,705 -3.91 63 -24.39 0.3125
2022-07-26 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 871,525 -41,011 62,262 0.3133
2024-02-14 2022-03-31 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 912,536 -123,345 -11.91 82 -29.91 0.3243
2022-05-06 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 912,536 -123,345 82,037 0.3029
2024-02-14 2021-12-31 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,035,881 441,127 74.17 117 -99.76 0.3860
2022-02-03 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,035,881 441,127 117,033 0.3665
2021-11-10 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 594,754 174,958 41.68 49,080 32.96 0.1800
2022-02-15 2021-06-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 419,796 -115,470 -21.57 36,913 -10.15 0.1331
2021-08-11 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 419,796 -115,470 36,913 0.1331
2022-02-14 2021-03-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 535,266 -171,222 -24.24 41,082 -90.65 0.1664
2021-04-26 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 535,266 -171,222 41,082 0.1664
2022-02-14 2020-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 706,488 150,647 27.10 439,152 1,503.56 0.2066
2021-02-10 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 706,488 150,647 43,915 0.2021
2022-02-14 2020-09-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 555,841 47,030 9.24 27,386 11.18 0.1613
2020-10-28 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 555,841 47,030 27,386 0.1620
2022-02-14 2020-06-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 508,811 -75,074 -12.86 24,632 -13.55 0.1628
2020-08-10 2020-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 508,811 -75,074 24,632 0.1648
2020-05-04 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 583,885 25,558 4.58 28,494 -14.23 0.2385
2020-02-11 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 558,327 246,404 79.00 33,221 97.99 0.2100
2019-11-07 2019-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 311,923 311,603 97,375.94 16,779 111,760.00 0.1231
2019-12-03 2019-06-30 13F/A-2 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 15 0.00 0.1303
2019-08-08 2019-06-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 251,554 251,234 11,853 0.0918
2019-07-30 2019-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 251,554 -218,066 11,853
2019-12-03 2019-03-31 13F/A-2 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 15 25.00 0.1363
2019-08-07 2019-03-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 255,956 255,636 12,258 0.1010
2019-05-10 2019-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 255,956 -6,447 12,258
2019-12-03 2018-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 12 -20.00 0.1402
2019-01-31 2018-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 262,403 -40,824 10,127 112,813.2679
2019-12-03 2018-09-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 15 -16.67 0.1480
2018-11-14 2018-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 303,227 302,907 14,358 108,610.4780
2019-12-03 2018-06-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 18 -5.26 0.1988
2018-08-03 2018-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 231,073 38,498 13,048 113,598.6796
2019-12-03 2018-03-31 13F/A-2 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 19 46.15 0.2025
2018-08-03 2018-03-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 192,575 192,255 11,269 0.1042
2018-05-09 2018-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 192,575 -30,212 11,269
2019-12-03 2017-12-31 13F/A-2 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 13 18.18 0.1386
2018-08-03 2017-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 222,787 222,467 9,321 0.0797
2018-02-07 2017-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 222,787 -18,940 9,321
2019-12-03 2017-09-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 320 0 0.00 11 -8.33 0.1405
2017-11-13 2017-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 241,727 -4,678 8,018 72,776.3393
2019-12-03 2017-06-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 320 -139,095 -99.77 12 -99.81 0.1717
2017-08-04 2017-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 246,405 106,990 9,548 92,275.6006
2017-05-10 2017-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 139,415 -30,790 -18.09 6,403 -1.45 0.0578
2017-02-16 2016-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 170,205 13,677 8.74 6,497 7.67 0.0644
2016-11-03 2016-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 156,528 98,621 170.31 6,034 327.64 0.0713
2016-08-03 2016-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 57,907 -105,349 -64.53 1,411 -74.91 0.0202
2016-05-11 2016-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 163,256 2,068 1.28 5,624 -4.82 0.0934
2016-02-11 2015-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 161,188 126,767 368.28 5,909 283.20 0.1089
2015-11-12 2015-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 34,421 -8,091 -19.03 1,542 -23.63 0.0310
2015-12-16 2015-06-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 42,512 -168,483 -79.85 2,019 -81.61 0.0260
2015-07-31 2015-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 42,512 2,019
2015-12-16 2015-03-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 210,995 -146,876 -41.04 10,978 -53.87 0.1395
2015-04-30 2015-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 210,995 10,978
2015-12-15 2014-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 357,871 214,584 149.76 23,799 190.02 0.2834
2015-02-12 2014-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 357,871 23,799
2014-10-16 2014-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 143,287 -235,441 -62.17 8,206 -61.87 0.2864
2014-08-01 2014-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 378,728 21,905 6.14 21,519 7.39 0.2458
2014-04-30 2014-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 356,823 37,867 11.87 20,039 11.87 0.3164
2014-01-21 2013-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 318,956 -77,551 -19.56 17,913 3.24 0.2710
2013-11-06 2013-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 396,507 62,477 18.70 17,351 15.87 0.2793
2013-07-29 2013-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 334,030 334,030 14,975 0.2778
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.