Seagate Technology Holdings plc
US ˙ NasdaqGS ˙ IE00BKVD2N49

SecuritySTX / Seagate Technology Holdings plc
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership93,275 shares
Latest Disclosed Value $ 36,541,414
Boothbay Fund Management, Llc ownership in STX / Seagate Technology Holdings plc

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 93,275 shares of Seagate Technology Holdings plc (US:STX) valued at $36,541,414 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 75,468 shares of Seagate Technology Holdings plc. This represents a change in shares of 23.60% during the quarter. The current value of the position is $79,047,764 USD.

Boothbay Fund Management, Llc has a history of taking positions in derivatives of the underlying security (STX) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 3,800 of underlying shares valued at $1,488,688 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

STX / Seagate Technology Holdings plc Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 93,275 17,807 23.60 36,541 75.82 0.4735
2026-02-17 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 75,468 -34,066 -31.10 20,783 -19.62 0.3101
2025-11-14 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 109,534 9,950 9.99 25,857 79.91 0.3760
2025-08-14 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 99,584 4,946 5.23 14,373 78.78 0.2792
2025-05-15 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 94,638 -50,722 -34.89 8,039 -35.92 0.2118
2025-02-14 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 145,360 45,420 45.45 12,546 14.62 0.3094
2024-11-14 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 99,940 99,940 10,946 0.2490
2024-05-15 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 0 -2,929 -100.00 0 -100.00
2024-02-14 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 2,929 -1,590 -35.18 250 -16.11 0.0064
2023-11-14 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,519 4,519 298 0.0071
2022-05-16 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 0 -4,707 -100.00 0 -100.00
2022-02-14 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,707 4,707 532 0.0125
2021-08-17 2021-06-30 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 0 -7,687 -100.00 0 -100.00
2021-05-17 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 7,687 7,687 590 0.0221
2020-05-15 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -10,764 -100.00 0 -100.00
2020-02-14 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 10,764 10,764 640 0.0557
2019-05-15 2019-03-31 13F SEAGATE TECHNOLOGY CALL G7945M907 0 -278 -100.00 0 -100.00
2019-02-14 2018-12-31 13F SEAGATE TECHNOLOGY CALL G7945M907 278 278 1,073 0.1564
2018-11-14 2018-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -8,493 -100.00 0 -100.00
2018-08-14 2018-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 8,493 -4,606 -35.16 480 -37.42 0.0418
2018-05-14 2018-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 13,099 13,099 767 0.0908
2017-05-15 2017-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 0 -6,193 -100.00 0 -100.00
2017-07-18 2016-12-31 13F/A-2 Seagate Technology SHS G7945M107 6,193 6,193 0.00 236 0.00 0.0537
2017-02-16 2016-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 6,193 0 236 0.0583
2017-02-15 2016-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 6,193 236
2016-06-09 2015-03-31 13F/A-2 SEAGATE TECHNOLOGY SHS G7945M107 0 -10,983 -100.00 0 -100.00
2015-02-17 2014-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 10,983 10,983 730 0.6309
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-05-17 2021-03-31 13F SEAGATE TECHNOLOGY CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-12 2020-12-31 13F SEAGATE TECHNOLOGY CALL Call 344 2,138 n/a n/a n/a
2020-11-16 2020-09-30 13F SEAGATE TECHNOLOGY CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-14 2020-06-30 13F SEAGATE TECHNOLOGY CALL Call 42 203 n/a n/a n/a
2019-05-15 2019-03-31 13F SEAGATE TECHNOLOGY CALL 0 -100.00 0 -100.00 n/a n/a n/a
2019-02-14 2018-12-31 13F SEAGATE TECHNOLOGY CALL 278 1,073 n/a n/a n/a
2018-05-14 2018-03-31 13F SEAGATE TECHNOLOGY CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-02-14 2017-12-31 13F SEAGATE TECHNOLOGY CALL Call 243 -9.67 1,017 14.01 n/a n/a n/a
2017-11-14 2017-09-30 13F SEAGATE TECHNOLOGY CALL Call 269 -99.37 892 -45.71 n/a n/a n/a
2017-08-14 2017-06-30 13F SEAGATE TECHNOLOGY SHS Call 42,400 90.99 1,643 61.08 n/a n/a n/a
2017-05-15 2017-03-31 13F SEAGATE TECHNOLOGY SHS Call 22,200 1,020 n/a n/a n/a
2016-06-09 2015-09-30 13F/A SEAGATE TECHNOLOGY SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-17 2015-06-30 13F/A SEAGATE TECHNOLOGY SHS Call 6,000 285 n/a n/a n/a
2015-08-14 2015-06-30 13F SEAGATE TECHNOLOGY SHS Call 6,000 285 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Put 3,800 -70.31 1,489 -57.78 n/a n/a n/a
2026-02-17 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Put 12,800 -17.95 3,525 -4.29 n/a n/a n/a
2025-11-14 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Put 15,600 3,683 n/a n/a n/a
2024-02-14 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Put 19,300 1,273 n/a n/a n/a
2018-02-14 2017-12-31 13F SEAGATE TECHNOLOGY PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-14 2017-09-30 13F SEAGATE TECHNOLOGY PUT Put 402 1,333 n/a n/a n/a
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.