STX

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · derivative · entry 11

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,869

Underlying: Ordinary Shares · 13,869 shares

Expires not disclosed

F6 · derivative.exercise_date: On September 14, 2025, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 13,869 of the 15,970 Performance Share Units granted on September 9, 2022. The 13,869 Ordinary Shares vested on September 14, 2025.

F6 · derivative.expiration_date: On September 14, 2025, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 13,869 of the 15,970 Performance Share Units granted on September 9, 2022. The 13,869 Ordinary Shares vested on September 14, 2025.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · nonDerivative · entry 6

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 18,041

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · nonDerivative · entry 7

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,843

F6 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $197.54 to $198.22. 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.

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · nonDerivative · entry 6

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,143

F5 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $196.44 to $197.33. 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.

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · nonDerivative · entry 5

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,097

F4 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $195.42 to $196.41. 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.

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · nonDerivative · entry 4

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 19,178

F3 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $194.40 to $195.38. 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.

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · nonDerivative · entry 3

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,378

F1 · shares: All sales of Ordinary Shares reported herein were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 1, 2025.

F2 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $193.33 to $194.28. 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.

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · derivative · entry 10

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,535

Underlying: Ordinary Shares · 941 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

F7 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · nonDerivative · entry 2

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,190

SEC source: 0001137789-25-000238 · wk-form4_1757974255.xml · nonDerivative · entry 1

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,620

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000239 · wk-form4_1757974263.xml · derivative · entry 5

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,552

Underlying: Ordinary Shares · 3,319 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

F1 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

SEC source: 0001137789-25-000239 · wk-form4_1757974263.xml · nonDerivative · entry 2

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 473,429

SEC source: 0001137789-25-000239 · wk-form4_1757974263.xml · nonDerivative · entry 1

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 475,107

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000236 · wk-form4_1757974240.xml · derivative · entry 3

Chong Kian Fatt · CIK 0001987421 · EVP Global Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,426

Underlying: Ordinary Shares · 678 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

F1 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

SEC source: 0001137789-25-000236 · wk-form4_1757974240.xml · nonDerivative · entry 1

Chong Kian Fatt · CIK 0001987421 · EVP Global Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,062

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000237 · wk-form4_1757974248.xml · derivative · entry 5

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,560

Underlying: Ordinary Shares · 1,695 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

F1 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

SEC source: 0001137789-25-000237 · wk-form4_1757974248.xml · nonDerivative · entry 2

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,809

SEC source: 0001137789-25-000237 · wk-form4_1757974248.xml · nonDerivative · entry 1

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,666

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · derivative · entry 10

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 21,090

Underlying: Ordinary Shares · 879 shares

Expires 2030-09-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 11, 2024 and the remaining options vest in equal monthly installments over the 36 months following September 11, 2024.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · derivative · entry 9

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 313 shares

Expires 2028-09-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one quarter of the options vested on September 9, 2022 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2022.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · derivative · entry 8

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,390

Underlying: Ordinary Shares · 533 shares

Expires 2029-09-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 9, 2023 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2023.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · derivative · entry 7

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,912

Underlying: Ordinary Shares · 989 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the reporting person under the Seagate Technology 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.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · nonDerivative · entry 5

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,172

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · nonDerivative · entry 4

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,904

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · nonDerivative · entry 3

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,025

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · nonDerivative · entry 2

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,712

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: All option exercises and the sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on October 31, 2024.

SEC source: 0001137789-25-000235 · wk-form4_1757974234.xml · nonDerivative · entry 1

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,179

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000219 · wk-form4_1757621099.xml · nonDerivative · entry 5

Teh Ban Seng · CIK 0001801425 · EVP & Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,190

F1 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $191.53 to $191.54. 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.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · derivative · entry 12

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 3,035 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Such RSUs vested 100% on September 9, 2025, the first anniversary of the grant.

F5 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Such RSUs vested 100% on September 9, 2025, the first anniversary of the grant.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · derivative · entry 11

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,188

Underlying: Ordinary Shares · 6,062 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 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.

F4 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 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.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · derivative · entry 10

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,834

Underlying: Ordinary Shares · 958 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2023 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.

F3 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2023 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · derivative · entry 9

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 3,017 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under Seagate Technology plc Equity Incentive Plan (the "Plan"). Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2022 and each one-year anniversary thereafter for a total vesting period of four years.

F2 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under Seagate Technology plc Equity Incentive Plan (the "Plan"). Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2022 and each one-year anniversary thereafter for a total vesting period of four years.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 8

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,971

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 7

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,505

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 6

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,470

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 5

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,534

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 4

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,472

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 3

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,957

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 2

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,999

SEC source: 0001137789-25-000223 · wk-form4_1757621133.xml · nonDerivative · entry 1

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,524

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 114 Ordinary Shares purchased by Reporting Person on July 31, 2025 under the Issuer's Employee Stock Purchase Plan. Such acquisition is exempt from reporting pursuant to Rule 16b-3 under the Securities Exchange Act of 1934.

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · derivative · entry 12

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 560 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F6 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Such RSUs vested 100% on September 9, 2025, the first anniversary of the grant.

F6 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Such RSUs vested 100% on September 9, 2025, the first anniversary of the grant.

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · derivative · entry 11

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,579

Underlying: Ordinary Shares · 2,526 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 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.

F5 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 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.

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · derivative · entry 10

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,997

Underlying: Ordinary Shares · 499 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2023 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.

F4 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2023 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · derivative · entry 9

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 1,885 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology plc Equity Incentive Plan (the "Plan"). Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2022 and each one-year anniversary thereafter for a total vesting period of four years.

F3 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology plc Equity Incentive Plan (the "Plan"). Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2022 and each one-year anniversary thereafter for a total vesting period of four years.

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · nonDerivative · entry 8

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,679

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · nonDerivative · entry 7

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,935

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · nonDerivative · entry 6

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,375

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · nonDerivative · entry 5

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,527

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · nonDerivative · entry 4

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,001

SEC source: 0001137789-25-000222 · wk-form4_1757621126.xml · nonDerivative · entry 3

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,229

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.