Seagate Technology is a leading supplier of hard disk drives for data storage to the enterprise and consumer markets. It forms a practical duopoly in the market with its chief rival, Western Digital; they are both vertically integrated.
STX Form 4 activity by transaction type, last 90 days
Form 4 transaction type
Transactions
Shares
Total value
Open-market sale
226
366,488
$295.06M
Grant or award
24
93,988
Option exercise
96
1,030,854
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
STX insider transactions (Form 4)
156
197 Form 4 filings on record, the earliest from Oct 2, 2024, newest first. Filing history page 3 of 3.
Footnote F1 (shares): All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025.
Footnote F2 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $375.25 to $376.13. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F3 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $376.37 to $376.91. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F4 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $377.45 to $378.37. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F5 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $378.69 to $379.68. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F6 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $379.89 to $380.83. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F7 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $380.95 to $381.92. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F8 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $381.99 to $382.98. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F9 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $383.05 to $384.00. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F10 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $384.05 to $384.93. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F11 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $385.11 to $386.02. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F12 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $387.35 to $387.64. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F13 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $389.61 to $390.49. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F14 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $391.68 to $392.58. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F15 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $392.95 to $393.73. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F16 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $394.26 to $395.19. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F17 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $395.77 to $396.74. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F18 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $397.51 to $397.70. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F19 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $401.89 to $402.43. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F20 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $404.64 to $405.36. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F1 (shares): All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 1, 2025.
Footnote F2 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $416.47 to $416.48. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F1 (shares): All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025.
Footnote F3 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $419.29 to $420.25. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F4 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $420.96 to $421.37. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F5 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $422.88 to $423.23. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F6 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $424.11 to $424.81. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F7 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $425.26 to $426.20. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F8 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $426.60 to $427.55. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F9 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $427.60 to $428.56. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F10 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $428.61 to $429.60. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F11 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $429.63 to $430.58. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F12 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $430.70 to $431.67. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F13 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $431.74 to $432.67. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F14 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $432.93 to $433.89. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F15 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $433.96 to $434.48. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F2 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $439.32 to $440.31. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F3 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $440.33 to $440.54. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F1 (shares): All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 4, 2025.
Footnote F1 (shares): All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025.
Footnote F2 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $266.72 to $267.68. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F3 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $267.76 to $268.73. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F4 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $268.78 to $269.71. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F5 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $269.78 to $270.74. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F6 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $270.78 to $271.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F7 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $271.78 to $272.74. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F8 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $272.81 to $273.35. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F1 (shares): All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 1, 2025.
Footnote F2 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $279.06 to $280.04. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F3 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $280.06 to $281.05. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F4 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $281.06 to $282.04. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F5 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $282.07 to $283.01. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F6 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $283.07 to $284.06. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F7 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $284.07 to $285.06. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F8 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $285.07 to $286.06. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F9 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $286.10 to $287.08. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F10 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $287.15 to $288.10. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F11 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $288.20 to $289.17. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F12 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $289.20 to $290.14. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F13 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $290.33 to $291.21. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F14 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $291.40 to $292.24. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F15 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $293.64 to $294.59. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F16 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $294.66 to $295.64. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F17 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $295.81 to $296.34. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F1 (shares): The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on October 31, 2024.
Footnote F1 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $266.00 to $266.82. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F1 (shares): All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025.
Footnote F2 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $253.95 to $254.89. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F3 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $255.60 to $256.54. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F4 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $256.60 to $257.52. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F5 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $257.64 to $258.47. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F6 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $258.72 to $259.60. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F7 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $260.00 to $260.65. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F8 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $261.04 to $261.90. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F9 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $262.05 to $262.37. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F10 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $263.07 to $263.83. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F11 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $264.77 to $265.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F12 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $265.77 to $266.73. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F13 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $266.78 to $267.68. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
Footnote F14 (price): These Ordinary Shares were sold in multiple trades at prices ranging from $268.37 to $269.00. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of… Full note on SEC EDGAR
See every STX filing on record
These pages show the latest 90 of 197 Form 4 filings on record. The 7-day demo shows all 197, and sign-up brings you back to this table.
An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
Seagate Technology Holdings plc (STX) had 32 insider filings in the last 90 days, with the most recent on 2026-10-02. The full record for STX runs to 197 Form 4 filings, the earliest from 2024-10-02. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying STX stock?
No insider purchases of STX were filed in the last 90 days.
How many insiders are selling STX stock?
226 insider sales of STX were filed in the last 90 days, totaling $295.06M.
Where can I see STX SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects STX Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
House of Representatives Periodic Transaction Reports from 2024. Senate filings are not included yet. The full history of STX beside its insider purchases is in the Congress Tracker.
William D. Mosley - OfficerOpen-market sale$323K
John Christopher Morris - Officer
Gianluca Romano - Officer
Ban Seng Teh - Officer
Yolanda Lee Conyers - Director
Jay L. Geldmacher - Director
Lisa C. McClainRepublican, MI-09
