=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-01-02
10b5-1 Pre-arranged Plan: Yes
--- Issuer ---
Name: Seagate Technology Holdings plc (STX)
CIK: 0001137789
--- Reporting Owner ---
Name: MOSLEY WILLIAM D
CIK: 0001388390
Role: Director, Officer (CEO)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -800 | Price: $281.09
Total Value: $224,875.12
Shares Owned After: 449,095 | Ownership: D (Direct)
Footnotes:
[F1] These Ordinary Shares were sold under a Rule 10b5-1 trading plan adopted by the Reporting Person February 20, 2025.
[F2] These Ordinary Shares were sold in multiple trades at prices ranging from $280.66 to $281.52. 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.
[Transaction #2]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -2,000 | Price: $282.09
Total Value: $564,172.60
Shares Owned After: 447,095 | Ownership: D (Direct)
Footnotes:
[F3] These Ordinary Shares were sold in multiple trades at prices ranging from $281.66 to $282.62. 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.
[Transaction #3]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -1,600 | Price: $283.22
Total Value: $453,153.76
Shares Owned After: 445,495 | Ownership: D (Direct)
Footnotes:
[F4] These Ordinary Shares were sold in multiple trades at prices ranging from $282.69 to $283.59. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
[Transaction #4]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -1,800 | Price: $284.08
Total Value: $511,352.10
Shares Owned After: 443,695 | Ownership: D (Direct)
Footnotes:
[F5] These Ordinary Shares were sold in multiple trades at prices ranging from $283.69 to $284.53. 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.
[Transaction #5]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -2,705 | Price: $285.23
Total Value: $771,550.13
Shares Owned After: 440,990 | Ownership: D (Direct)
Footnotes:
[F6] These Ordinary Shares were sold in multiple trades at prices ranging from $284.70 to $285.68. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
[Transaction #6]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -3,586 | Price: $286.32
Total Value: $1,026,754.64
Shares Owned After: 437,404 | Ownership: D (Direct)
Footnotes:
[F7] These Ordinary Shares were sold in multiple trades at prices ranging from $285.71 to $286.69. 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.
[Transaction #7]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -5,009 | Price: $287.27
Total Value: $1,438,954.97
Shares Owned After: 432,395 | Ownership: D (Direct)
Footnotes:
[F8] These Ordinary Shares were sold in multiple trades at prices ranging from $286.71 to $287.67. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
[Transaction #8]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -2,100 | Price: $288.01
Total Value: $604,821.00
Shares Owned After: 430,295 | Ownership: D (Direct)
Footnotes:
[F9] These Ordinary Shares were sold in multiple trades at prices ranging from $287.72 to $288.66. 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.
[Transaction #9]
Security: Ordinary Shares
Date: 2026-01-02 | Code: S (Open market sale)
Shares: -400 | Price: $289.03
Total Value: $115,611.00
Shares Owned After: 429,895 | Ownership: D (Direct)
Footnotes:
[F10] These Ordinary Shares were sold in multiple trades at prices ranging from $288.74 to $289.25. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
--- Footnotes (Complete Index) ---
F1: These Ordinary Shares were sold under a Rule 10b5-1 trading plan adopted by the Reporting Person February 20, 2025.
F10: These Ordinary Shares were sold in multiple trades at prices ranging from $288.74 to $289.25. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
F2: These Ordinary Shares were sold in multiple trades at prices ranging from $280.66 to $281.52. 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.
F3: These Ordinary Shares were sold in multiple trades at prices ranging from $281.66 to $282.62. 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.
F4: These Ordinary Shares were sold in multiple trades at prices ranging from $282.69 to $283.59. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
F5: These Ordinary Shares were sold in multiple trades at prices ranging from $283.69 to $284.53. 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.
F6: These Ordinary Shares were sold in multiple trades at prices ranging from $284.70 to $285.68. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
F7: These Ordinary Shares were sold in multiple trades at prices ranging from $285.71 to $286.69. 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.
F8: These Ordinary Shares were sold in multiple trades at prices ranging from $286.71 to $287.67. 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 the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
F9: These Ordinary Shares were sold in multiple trades at prices ranging from $287.72 to $288.66. 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.
--- Signature ---
/s/ /s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley (2026-01-06)
