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  4. [Form 4] Seagate Technology Holdings plc Insider Trading Activity

Seagate (STX) CEO sells 16,220 shares under 10b5-1 plan

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

Seagate Technology Holdings plc CEO William D. Mosley reported a combination of open-market sales and an option exercise involving the company’s Ordinary Shares. On June 1, 2026, he sold a total of 16,220 Ordinary Shares in multiple transactions at prices ranging from $884.23 to $915.95 per share.

On the same date, he exercised stock options to acquire 14,000 Ordinary Shares at an exercise price of $46.23 per share under the issuer’s 2012 Equity Incentive Plan. Following these transactions, Mosley directly owns 353,591 Ordinary Shares. All reported trades were effected pursuant to a Rule 10b5-1 trading plan adopted on February 18, 2026.

Positive

  • None.

Negative

  • None.
Insider MOSLEY WILLIAM D
Role CEO
Sold 16,220 shs ($14.60M)
Type Security Shares Price Value
Exercise NQ Options 14,000 $0.00 --
Exercise Ordinary Shares 14,000 $46.23 $647K
Sale Ordinary Shares 600 $884.6243 $531K
Sale Ordinary Shares 360 $885.6744 $319K
Sale Ordinary Shares 360 $886.7233 $319K
Sale Ordinary Shares 240 $887.715 $213K
Sale Ordinary Shares 163 $888.8881 $145K
Sale Ordinary Shares 640 $889.9414 $570K
Sale Ordinary Shares 1,160 $890.9849 $1.03M
Sale Ordinary Shares 760 $892.0601 $678K
Sale Ordinary Shares 208 $893.0004 $186K
Sale Ordinary Shares 480 $894.1951 $429K
Sale Ordinary Shares 481 $895.4505 $431K
Sale Ordinary Shares 320 $896.4263 $287K
Sale Ordinary Shares 280 $897.4286 $251K
Sale Ordinary Shares 813 $898.4091 $730K
Sale Ordinary Shares 160 $899.2725 $144K
Sale Ordinary Shares 320 $900.5425 $288K
Sale Ordinary Shares 860 $901.5588 $775K
Sale Ordinary Shares 839 $902.6173 $757K
Sale Ordinary Shares 779 $903.7842 $704K
Sale Ordinary Shares 879 $904.7047 $795K
Sale Ordinary Shares 740 $905.7608 $670K
Sale Ordinary Shares 1,285 $906.788 $1.17M
Sale Ordinary Shares 760 $907.7538 $690K
Sale Ordinary Shares 853 $909.1785 $776K
Sale Ordinary Shares 600 $910.1473 $546K
Sale Ordinary Shares 480 $911.0333 $437K
Sale Ordinary Shares 320 $912.2225 $292K
Sale Ordinary Shares 280 $914.6057 $256K
Sale Ordinary Shares 200 $915.518 $183K
Holdings After Transaction: NQ Options — 139,100 shares (Direct, null); Ordinary Shares — 353,591 shares (Direct, null)
Footnotes (1)
  1. All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026. These Ordinary Shares were sold in multiple trades at prices ranging from $884.23 to $885.22. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $885.23 to $886.21. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $886.37 to $887.03. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $887.37 to $888.15. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $888.42 to $889.34. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $889.50 to $890.36. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $890.53 to $891.50. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $891.71 to $892.52. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $892.71 to $893.17. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $893.78 to $894.62. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $894.83 to $895.80. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $895.92 to $896.72. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $896.93 to $897.85. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $898.01 to $899.00 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $899.03 to $899.95. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $900.11 to $900.97. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $901.23 to $902.19. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $902.26 to $903.20. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $903.27 to $904.14. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $904.29 to $905.24. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $905.32 to $906.31. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $906.32 to $907.18. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $907.35 to $908.31. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $908.50 to $909.47. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $909.68 to $910.41. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $910.68 to $911.40. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $911.89 to $912.73. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $914.14 to $914.78. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. These Ordinary Shares were sold in multiple trades at prices ranging from $915.18 to $915.95. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected. Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four year vesting schedule. Subject to continuous employment, one quarter of the option shares vested on September 9, 2021. The remaining option shares vest in equal monthly installments over the 36 months following September 9, 2021.
Shares sold 16,220 shares Open-market sales of Ordinary Shares on June 1, 2026
Shares exercised 14,000 shares Options exercised into Ordinary Shares on June 1, 2026
Exercise price $46.23 per share Option exercise price for 14,000 Ordinary Shares
Post-transaction holdings 353,591 shares Ordinary Shares directly owned after transactions
Sale price range $884.23–$915.95 per share Footnoted price bands for multiple Ordinary Share sales
Option expiration September 9, 2027 Expiration date for options on 14,000 shares
Derivative holdings after exercise 139,100 option shares Total NQ Options following 14,000-share exercise
Rule 10b5-1 trading plan regulatory
"All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average sale price financial
"The price reported above reflects the weighted average sale price"
Exercise or conversion of derivative security financial
"transaction_code_description: Exercise or conversion of derivative security"
Equity Incentive Plan financial
"Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four year vesting schedule"
An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.
NQ Options financial
""security_title": "NQ Options""
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
MOSLEY WILLIAM D
(Last)(First)(Middle)
SEAGATE TECHNOLOGY HOLDINGS PLC
47488 KATO ROAD
(Street)
FREMONT CALIFORNIA 94538
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Seagate Technology Holdings plc [ STX ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Ordinary Shares06/01/2026M14,000(1)A$46.23353,591D
Ordinary Shares06/01/2026S600D$884.6243(2)352,991D
Ordinary Shares06/01/2026S360D$885.6744(3)352,631D
Ordinary Shares06/01/2026S360D$886.7233(4)352,271D
Ordinary Shares06/01/2026S240D$887.715(5)352,031D
Ordinary Shares06/01/2026S163D$888.8881(6)351,868D
Ordinary Shares06/01/2026S640D$889.9414(7)351,228D
Ordinary Shares06/01/2026S1,160D$890.9849(8)350,068D
Ordinary Shares06/01/2026S760D$892.0601(9)349,308D
Ordinary Shares06/01/2026S208D$893.0004(10)349,100D
Ordinary Shares06/01/2026S480D$894.1951(11)348,620D
Ordinary Shares06/01/2026S481D$895.4505(12)348,139D
Ordinary Shares06/01/2026S320D$896.4263(13)347,819D
Ordinary Shares06/01/2026S280D$897.4286(14)347,539D
Ordinary Shares06/01/2026S813D$898.4091(15)346,726D
Ordinary Shares06/01/2026S160D$899.2725(16)346,566D
Ordinary Shares06/01/2026S320D$900.5425(17)346,246D
Ordinary Shares06/01/2026S860D$901.5588(18)345,386D
Ordinary Shares06/01/2026S839D$902.6173(19)344,547D
Ordinary Shares06/01/2026S779D$903.7842(20)343,768D
Ordinary Shares06/01/2026S879D$904.7047(21)342,889D
Ordinary Shares06/01/2026S740D$905.7608(22)342,149D
Ordinary Shares06/01/2026S1,285D$906.788(23)340,864D
Ordinary Shares06/01/2026S760D$907.7538(24)340,104D
Ordinary Shares06/01/2026S853D$909.1785(25)339,251D
Ordinary Shares06/01/2026S600D$910.1473(26)338,651D
Ordinary Shares06/01/2026S480D$911.0333(27)338,171D
Ordinary Shares06/01/2026S320D$912.2225(28)337,851D
Ordinary Shares06/01/2026S280D$914.6057(29)337,571D
Ordinary Shares06/01/2026S200D$915.518(30)337,371D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
NQ Options$46.2306/01/2026M14,000 (31)09/09/2027Ordinary Shares14,000$0139,100D
Explanation of Responses:
1. All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.
2. These Ordinary Shares were sold in multiple trades at prices ranging from $884.23 to $885.22. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
3. These Ordinary Shares were sold in multiple trades at prices ranging from $885.23 to $886.21. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
4. These Ordinary Shares were sold in multiple trades at prices ranging from $886.37 to $887.03. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
5. These Ordinary Shares were sold in multiple trades at prices ranging from $887.37 to $888.15. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
6. These Ordinary Shares were sold in multiple trades at prices ranging from $888.42 to $889.34. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
7. These Ordinary Shares were sold in multiple trades at prices ranging from $889.50 to $890.36. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
8. These Ordinary Shares were sold in multiple trades at prices ranging from $890.53 to $891.50. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
9. These Ordinary Shares were sold in multiple trades at prices ranging from $891.71 to $892.52. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
10. These Ordinary Shares were sold in multiple trades at prices ranging from $892.71 to $893.17. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
11. These Ordinary Shares were sold in multiple trades at prices ranging from $893.78 to $894.62. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
12. These Ordinary Shares were sold in multiple trades at prices ranging from $894.83 to $895.80. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
13. These Ordinary Shares were sold in multiple trades at prices ranging from $895.92 to $896.72. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
14. These Ordinary Shares were sold in multiple trades at prices ranging from $896.93 to $897.85. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
15. These Ordinary Shares were sold in multiple trades at prices ranging from $898.01 to $899.00 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
16. These Ordinary Shares were sold in multiple trades at prices ranging from $899.03 to $899.95. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
17. These Ordinary Shares were sold in multiple trades at prices ranging from $900.11 to $900.97. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
18. These Ordinary Shares were sold in multiple trades at prices ranging from $901.23 to $902.19. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
19. These Ordinary Shares were sold in multiple trades at prices ranging from $902.26 to $903.20. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
20. These Ordinary Shares were sold in multiple trades at prices ranging from $903.27 to $904.14. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
21. These Ordinary Shares were sold in multiple trades at prices ranging from $904.29 to $905.24. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
22. These Ordinary Shares were sold in multiple trades at prices ranging from $905.32 to $906.31. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
23. These Ordinary Shares were sold in multiple trades at prices ranging from $906.32 to $907.18. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
24. These Ordinary Shares were sold in multiple trades at prices ranging from $907.35 to $908.31. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
25. These Ordinary Shares were sold in multiple trades at prices ranging from $908.50 to $909.47. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
26. These Ordinary Shares were sold in multiple trades at prices ranging from $909.68 to $910.41. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
27. These Ordinary Shares were sold in multiple trades at prices ranging from $910.68 to $911.40. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
28. These Ordinary Shares were sold in multiple trades at prices ranging from $911.89 to $912.73. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
29. These Ordinary Shares were sold in multiple trades at prices ranging from $914.14 to $914.78. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
30. These Ordinary Shares were sold in multiple trades at prices ranging from $915.18 to $915.95. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
31. Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four year vesting schedule. Subject to continuous employment, one quarter of the option shares vested on September 9, 2021. The remaining option shares vest in equal monthly installments over the 36 months following September 9, 2021.
Remarks:
/s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley06/02/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did Seagate (STX) CEO William D. Mosley report in this Form 4 filing?

William D. Mosley reported selling 16,220 Ordinary Shares of Seagate and exercising options for 14,000 shares. These transactions occurred on June 1, 2026 and were executed under a pre-arranged Rule 10b5-1 trading plan adopted on February 18, 2026.

How many Seagate (STX) shares did the CEO sell on June 1, 2026?

On June 1, 2026, the CEO sold 16,220 Seagate Ordinary Shares in open-market transactions. The filing groups these into multiple trades, each with specific share amounts, and classifies them as sale in open market or private transaction under transaction code S.

At what prices were the Seagate (STX) CEO’s shares sold according to the Form 4?

The CEO’s Ordinary Shares were sold in multiple trades at prices ranging from $884.23 to $915.95 per share. For each price band, the Form 4 reports a weighted average sale price and notes that full trade-by-trade details are available upon request.

What options did Seagate (STX) CEO William D. Mosley exercise in this filing?

Mosley exercised options covering 14,000 Ordinary Shares at an exercise price of $46.23 per share, linked to NQ Options expiring on September 9, 2027. These options were granted under Seagate’s 2012 Equity Incentive Plan with a four-year vesting schedule.

How many Seagate (STX) shares does the CEO own after these transactions?

After the reported sales and option exercise, William D. Mosley directly owns 353,591 Ordinary Shares of Seagate. This post-transaction holding figure comes from the Form 4’s total shares following transaction field associated with his non-derivative Ordinary Share position.

Were the Seagate (STX) CEO’s share sales made under a Rule 10b5-1 trading plan?

Yes. A footnote states that all transactions in this Form 4 were effected under a Rule 10b5-1 trading plan adopted on February 18, 2026. Such plans pre-schedule trades, which can make the timing less indicative of the insider’s short-term market views.

What does the transaction summary show about net buying or selling by Seagate’s CEO?

The transaction summary shows 29 sale transactions totaling 16,220 shares sold and 1 option exercise for 14,000 shares. Net buy/sell shares are reported as -16,220 with a net-sell direction, reflecting overall share dispositions despite the option exercise.