Seagate Technology (STX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-09 10b5-1 Pre-arranged Plan: No --- 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: 2026-09-09 | Code: M (Exercise of derivative) Shares: +500 | Price: $0.00 Shares Owned After: 15,959.75 | Ownership: D (Direct) [Transaction #2] Security: Ordinary Shares Date: 2026-09-10 | Code: S (Open market sale) Shares: -253 | Price: $862.12 Total Value: $218,117.62 Shares Owned After: 15,706.75 | Ownership: D (Direct) [Transaction #3] Security: Ordinary Shares Date: 2026-09-09 | Code: M (Exercise of derivative) Shares: +631 | Price: $0.00 Shares Owned After: 16,337.75 | Ownership: D (Direct) [Transaction #4] Security: Ordinary Shares Date: 2026-09-10 | Code: S (Open market sale) Shares: -319.25 | Price: $862.14 Total Value: $275,236.92 Shares Owned After: 16,018.5 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Restricted Share Unit Date: 2026-09-09 | Code: M (Exercise of derivative) Shares: -500 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). One-quarter of the shares vested on September 9, 2023 and the remaining portion vested in equal quarterly installments over the following three years for a total vesting period of four years [F1] Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). One-quarter of the shares vested on September 9, 2023 and the remaining portion vested in equal quarterly installments over the following three years for a total vesting period of four years [Transaction #2] Security: Restricted Share Unit Date: 2026-09-09 | Code: M (Exercise of derivative) Shares: -631 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 5,055 | Ownership: D (Direct) Footnotes: [F2] Consists of a grant of RSUs awarded to the Reporting Person under the Plan. One-quarter of the shares vested on September 9, 2025 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years. [F2] Consists of a grant of RSUs awarded to the Reporting Person under the Plan. One-quarter of the shares vested on September 9, 2025 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years. --- Footnotes (Complete Index) --- F1: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). One-quarter of the shares vested on September 9, 2023 and the remaining portion vested in equal quarterly installments over the following three years for a total vesting period of four years F2: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. One-quarter of the shares vested on September 9, 2025 and the remaining portion shall vest 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 (2026-09-11)