Seagate Technology Holdings plc
DE ˙ XTRA ˙ IE00BKVD2N49
38,91 € ↓ -0,56 (-1,41%)
2017-05-15
DEL PRIS
SecurityDE:STT / Seagate Technology Holdings plc
InstitutionHartland & Co., LLC
Latest Disclosed Ownership7,170 shares
Latest Disclosed Value $ 2,808,709
Hartland & Co., LLC reports 84.12% decrease in ownership of STT / Seagate Technology Holdings plc

On May 6, 2026 - Hartland & Co., LLC filed a 13F-HR form disclosing ownership of 7,170 shares of Seagate Technology Holdings plc (DE:STT) valued at $2,808,709 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 45,144 shares of Seagate Technology Holdings plc. This represents a change in shares of -84.12% during the quarter. The current value of the position is $278,985 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)
2026-05-06 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 7,170 -37,974 -84.12 2,809 -77.41 0.0257
2026-02-09 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 45,144 -9,765 -17.78 12,432 -4.08 0.1567
2025-11-10 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 54,909 -32,982 -37.53 12,962 2.18 0.1701
2025-08-08 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 87,891 75,575 613.63 12,685 1,112.72 0.1782
2025-05-13 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 12,316 452 3.81 1,046 2.15 0.0162
2025-02-10 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 11,864 192 1.64 1,024 -19.87 0.0155
2024-11-13 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 11,672 480 4.29 1,278 10.65 0.0198
2024-08-12 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 11,192 10,369 1,259.90 1,156 1,419.74 0.0197
2024-05-14 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 823 26 3.26 77 11.76 0.0038
2024-02-12 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 797 297 59.40 68 112.50 0.0036
2023-11-13 2023-09-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 500 0 0.00 33 6.67 0.0020
2023-11-07 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 25,426 24,926 1,677 0.0922
2023-08-07 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 500 -8 -1.57 31 -9.09 0.0019
2023-05-09 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 508 8 1.60 34 26.92 0.0024
2023-02-14 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 500 0 0.00 26 -3.70 0.0021
2022-11-15 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 500 -26,301 -98.13 27 -98.59 0.0025
2022-08-12 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 26,801 675 2.58 1,915 -18.48 0.1493
2022-05-04 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 26,126 141 0.54 2,349 -19.99 0.1594
2022-02-14 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 25,985 655 2.59 2,936 40.48 0.1997
2021-11-12 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 25,330 600 2.43 2,090 -3.91 0.1559
2021-08-12 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 24,730 600 2.49 2,175 17.44 0.1674
2021-05-14 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 24,130 0 0.00 1,852 23.47 0.1543
2021-02-11 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 24,130 23,463 3,517.69 1,500 4,445.45 0.1364
2020-11-12 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 667 667 33 0.0035
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.