Seagate Technology Holdings plc
US ˙ NasdaqGS ˙ IE00BKVD2N49

SecuritySTX / Seagate Technology Holdings plc
InstitutionFranklin Resources Inc
Latest Disclosed Ownership3,518,195 shares
Latest Disclosed Value $ 1,378,288,148
Franklin Resources Inc ownership in STX / Seagate Technology Holdings plc

On May 13, 2026 - Franklin Resources Inc filed a 13F-HR form disclosing ownership of 3,518,195 shares of Seagate Technology Holdings plc (US:STX) valued at $1,378,288,073 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 4,026,126 shares of Seagate Technology Holdings plc. This represents a change in shares of -12.62% during the quarter. The current value of the position is $3,309,530,855 USD.

Franklin Resources Inc 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 .

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)
2026-05-13 2026-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 3,518,195 -507,931 -12.62 1,378,288 24.31 0.3376
2026-02-11 2025-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 4,026,126 -4,041,090 -50.09 1,108,755 -41.78 0.2720
2025-11-13 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 8,067,216 -219,158 -2.64 1,904,347 59.23 0.4749
2025-08-12 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 8,286,374 -327,082 -3.80 1,195,972 63.45 0.3171
2025-05-13 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 8,613,456 6,733,601 358.20 731,713 350.98 0.2105
2025-02-12 2024-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,879,855 101,044 5.68 162,250 -17.99 0.0451
2024-11-27 2024-09-30 13F/A-1 SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,778,811 405,232 29.50 197,844 39.48 0.0556
2024-11-12 2024-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,808,225 434,646 200,821 0.0097
2024-08-14 2024-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 1,373,579 631,426 85.08 141,850 105.41 0.0436
2024-05-13 2024-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 742,153 729,586 5,805.57 69,057 6,341.88 0.0219
2024-02-09 2023-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 12,567 -4,552 -26.59 1,073 -4.96 0.0005
2023-11-13 2023-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 17,119 445 2.67 1,129 9.41 0.0006
2023-08-11 2023-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 16,674 -277,332 -94.33 1,032 -94.70 0.0005
2023-05-12 2023-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 294,006 51,238 21.11 19,440 52.20 0.0098
2023-02-10 2022-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 242,768 30,625 14.44 12,772 13.11 0.0066
2022-11-14 2022-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 212,143 45,716 27.47 11,292 -5.03 0.0062
2022-08-11 2022-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 166,427 -36,963 -18.17 11,890 -34.97 0.0059
2022-05-13 2022-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 203,390 -32,913 -13.93 18,284 -31.51 0.0073
2022-02-11 2021-12-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 236,303 -7,366 -3.02 26,697 32.77 0.0096
2021-11-12 2021-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 243,669 222,381 1,044.63 20,108 974.15 0.0076
2021-08-13 2021-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS G7997R103 21,288 -4,224 -16.56 1,872 -4.34 0.0007
2021-05-13 2021-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 25,512 1,976 8.40 1,957 33.77 0.0008
2021-02-10 2020-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 23,536 -6,923 -22.73 1,463 -2.47 0.0006
2020-11-12 2020-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 30,459 9,271 43.76 1,500 43.13 0.0007
2020-08-13 2020-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 21,188 502 2.43 1,048 3.87 0.0005
2020-05-13 2020-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 20,686 2,566 14.16 1,009 -6.40 0.0007
2020-03-11 2019-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 18,120 -495 -2.66 1,078 7.69 0.0006
2020-02-12 2019-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 18,120 -495 1,078 136.1662
2019-11-14 2019-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 18,615 -384 -2.02 1,001 11.84 0.0005
2019-08-14 2019-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 18,999 -51,019 -72.87 895 -73.32 0.0005
2019-05-15 2019-03-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 70,018 -12,588 -15.24 3,354 5.21 0.0018
2019-05-14 2019-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 70,018 -12,588 3,354
2019-02-12 2018-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 82,606 -39,585 -32.40 3,188 -44.91 0.0019
2018-11-13 2018-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 122,191 62,722 105.47 5,787 72.28 0.0029
2018-08-14 2018-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 59,469 -24,685 -29.33 3,359 -31.77 0.0017
2018-05-10 2018-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 84,154 -49,573 -37.07 4,923 -12.01 0.0025
2018-02-14 2017-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 133,727 -38,652 -22.42 5,595 -2.15 0.0027
2017-11-13 2017-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 172,379 4,493 2.68 5,718 -12.11 0.0028
2017-08-10 2017-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 167,886 145,787 659.70 6,506 540.99 0.0032
2017-05-12 2017-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 22,099 5,115 30.12 1,015 56.64 0.0005
2017-02-14 2016-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 16,984 743 4.57 648 3.51 0.0003
2016-11-14 2016-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 16,241 0 0.00 626 58.48 0.0003
2016-08-11 2016-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 16,241 -17,055 -51.22 395 -65.56 0.0002
2016-05-10 2016-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 33,296 -327,505 -90.77 1,147 -91.33 0.0006
2016-04-27 2015-12-31 13F/A-1 SEAGATE TECHNOLOGY SHS G7945M107 360,801 -340,575 -48.56 13,227 -57.90 0.0067
2016-02-12 2015-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 360,801 13,227
2015-11-10 2015-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 701,376 -3,480 -0.49 31,421 -6.15 0.0155
2015-08-12 2015-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 704,856 -2,595 -0.37 33,481 -9.04 0.0152
2015-05-14 2015-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 707,451 -12,145 -1.69 36,809 -23.08 0.0167
2015-02-10 2014-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 719,596 -170 -0.02 47,853 16.09 0.0217
2014-11-12 2014-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 719,766 -8,280 -1.14 41,221 -0.36 0.0188
2014-08-12 2014-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 728,046 674,400 1,257.13 41,368 1,272.98 0.0182
2014-05-13 2014-03-31 13F SEAGATE TECHNOLOGY SHS G7945M107 53,646 -3,550 -6.21 3,013 -6.20 0.0014
2014-02-12 2013-12-31 13F SEAGATE TECHNOLOGY SHS G7945M107 57,196 -1,000 -1.72 3,212 26.21 0.0016
2013-11-14 2013-09-30 13F SEAGATE TECHNOLOGY SHS G7945M107 58,196 0 0.00 2,545 -2.45 0.0014
2013-08-09 2013-06-30 13F SEAGATE TECHNOLOGY SHS G7945M107 58,196 58,196 2,609 0.0015
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
(%)
2025-11-13 2025-09-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-12 2025-06-30 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Call 497,031 -35.97 71,736 8.78 n/a n/a n/a
2025-05-13 2025-03-31 13F SEAGATE TECHNOLOGY HLDNGS PL ORD SHS Call 776,291 65,946 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.