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
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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.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)