Seagate Technology Holdings plc
US ˙ NasdaqGS ˙ IE00BKVD2N49

SecuritySTX / Seagate Technology Holdings plc
InstitutionPinnacle Associates Ltd
Latest Disclosed Ownership2,812 shares
Latest Disclosed Value $ 1,101,668
Pinnacle Associates Ltd reports 2.80% decrease in ownership of STX / Seagate Technology Holdings plc

On April 21, 2026 - Pinnacle Associates Ltd filed a 13F-HR form disclosing ownership of 2,812 shares of Seagate Technology Holdings plc (US:STX) valued at $1,101,629 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 2,893 shares of Seagate Technology Holdings plc. This represents a change in shares of -2.80% during the quarter. The current value of the position is $2,645,220 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)
2026-04-21 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,812 -81 -2.80 1,102 38.32 0.0141
2026-02-05 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,893 149 5.43 797 23.03 0.0102
2025-11-13 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,744 -134 -4.66 648 55.90 0.0086
2025-08-04 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,878 -65 -2.21 415 66.00 0.0060
2025-05-06 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,943 -13 -0.44 250 -1.96 0.0037
2025-02-14 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,956 93 3.25 255 4.51 0.0035
2024-10-25 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,863 -63 -2.15 244 -19.21 0.0042
2024-07-30 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,926 54 1.88 302 13.11 0.0047
2024-04-26 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,872 9 0.31 267 9.43 0.0042
2024-01-19 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,863 -978 -25.46 244 -3.56 0.0041
2023-10-24 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,841 -1,006 -20.76 253 -15.38 0.0047
2023-07-27 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,847 72 1.51 300 -5.08 0.0052
2023-05-05 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,775 11 0.23 316 26.00 0.0065
2023-02-01 2022-12-31 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,764 4,764 251 0.0055
2023-01-25 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 5,096 5,096 279 0.0000
2022-10-31 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 0 -3,547 -100.00 0 -100.00
2022-08-02 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,547 0 0.00 253 -20.69 0.0055
2022-05-05 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,547 0 0.00 319 -20.45 0.0056
2022-02-02 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,547 220 6.61 401 45.82 0.0069
2021-10-19 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,327 54 1.65 275 -4.51 0.0051
2021-08-02 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,273 0 0.00 288 14.74 0.0052
2021-05-12 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 3,273 0 0.00 251 23.65 0.0048
2021-01-26 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 3,273 -1,050 -24.29 203 -4.69 0.0041
2020-10-23 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 4,323 75 1.77 213 3.40 0.0051
2020-08-14 2020-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 4,248 -1,400 -24.79 206 -25.36 0.0051
2020-05-13 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 5,648 1,745 44.71 276 18.97 0.0084
2020-02-03 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 3,903 3,903 232 0.0051
2019-02-05 2018-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -8,304 -100.00 0 -100.00
2018-11-09 2018-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 8,304 936 12.70 393 -5.53 0.0082
2018-08-08 2018-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 7,368 -10,044 -57.68 416 -59.18 0.0086
2018-05-11 2018-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 17,412 -9,975 -36.42 1,019 -11.08 0.0200
2018-02-12 2017-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 27,387 -26,831 -49.49 1,146 -36.26 0.0220
2017-11-13 2017-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 54,218 25,631 89.66 1,798 62.27 0.0331
2017-08-09 2017-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 28,587 880 3.18 1,108 -12.96 0.0213
2017-05-09 2017-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 27,707 27,707 1,273 0.0243
2016-08-15 2016-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -28,263 -100.00 0 -100.00
2016-05-13 2016-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 28,263 -4,970 -14.96 974 -20.03 0.0208
2016-02-11 2015-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 33,233 -58,574 -63.80 1,218 -70.39 0.0256
2016-02-09 2015-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 33,233 -58,574 1,218 0.0260
2015-11-10 2015-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 91,807 -24,291 -20.92 4,113 -25.42 0.0910
2015-08-12 2015-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 116,098 6,803 6.22 5,515 -3.02 0.1024
2015-05-15 2015-03-31 13F Seagate Technology COM G7945M107 109,295 -15,710 -12.57 5,687 -31.59 0.1061
2015-02-12 2014-12-31 13F Seagate Technology COM G7945M107 125,005 4,199 3.48 8,313 20.15 0.1630
2014-11-12 2014-09-30 13F Seagate Technology COM G7945M107 120,806 4,292 3.68 6,919 4.52 0.1409
2014-08-14 2014-06-30 13F Seagate Technology COM G7945M107 116,514 6,982 6.37 6,620 7.62 0.1292
2014-05-14 2014-03-31 13F Seagate Technology COM G7945M107 109,532 9,152 9.12 6,151 9.12 0.1200
2014-02-12 2013-12-31 13F Seagate Technology COM G7945M107 100,380 78,940 368.19 5,637 500.96 0.1101
2013-11-14 2013-09-30 13F Seagate Technology COM G7945M107 21,440 10,390 94.03 938 89.49 0.0194
2013-08-13 2013-06-30 13F Seagate Technology COM G7945M107 11,050 11,050 495 0.0111
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.