Seagate Technology Holdings plc (STX) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-11 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Seagate Technology Holdings plc (STX) CIK: 0001137789 --- Reporting Owner --- Name: Morris John Christopher CIK: 0001988271 Role: Officer (EVP & CTO) --- Non-Derivative Transactions --- [Transaction #1] Security: Ordinary Shares Date: 2026-06-11 | Code: M (Exercise of derivative) Shares: +942 | Price: $0.00 Shares Owned After: 13,452.25 | Ownership: D (Direct) [Transaction #2] Security: Ordinary Shares Date: 2026-06-12 | Code: S (Open market sale) Shares: -466 | Price: $880.19 Total Value: $410,168.54 Shares Owned After: 12,986.25 | Ownership: D (Direct) [Transaction #3] Security: Ordinary Shares Date: 2026-06-12 | Code: S (Open market sale) Shares: -898 | Price: $880.19 Total Value: $790,410.62 Shares Owned After: 12,088.25 | Ownership: D (Direct) Footnotes: [F1] These Ordinary Shares were sold under a Rule 10b5-1 trading plan adopted by the Reporting Person on January 29, 2026. --- Derivative Transactions --- [Transaction #1] Security: Restricted Share Unit Date: 2026-06-11 | Code: M (Exercise of derivative) Shares: -942 | Price: $0.00 Shares Owned After: 4,710 | Ownership: D (Direct) Footnotes: [F2] Consists of a grant of restricted share unit awarded to the reporting person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, one-quarter vested starting on September 11, 2024 and then in equal quarterly installments over the following three years for a total vesting period of four years. [F2] Consists of a grant of restricted share unit awarded to the reporting person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, one-quarter vested starting on September 11, 2024 and then in equal quarterly installments over the following three years for a total vesting period of four years. --- Footnotes (Complete Index) --- F1: These Ordinary Shares were sold under a Rule 10b5-1 trading plan adopted by the Reporting Person on January 29, 2026. F2: Consists of a grant of restricted share unit awarded to the reporting person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, one-quarter vested starting on September 11, 2024 and then in equal quarterly installments over the following three years for a total vesting period of four years. --- Signature --- /s/ /s/ Louis J. Thorson, Attorney-in-Fact for John C. Morris (2026-06-15)