STX

SEC source: 0001137789-26-000078 · wk-form4_1776977687.xml · nonDerivative · entry 2

Lee James CI · CIK 0001773423 · EVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,021

SEC source: 0001137789-26-000078 · wk-form4_1776977687.xml · nonDerivative · entry 1

Lee James CI · CIK 0001773423 · EVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,561

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 67 Ordinary Shares purchased by Reporting Person on January 31, 2026 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 21

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 355,591

F18 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $427.63 to $428.14. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 20

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 355,891

F17 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $426.47 to $427.45. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 19

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 356,691

F16 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $425.46 to $426.19. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 18

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 357,691

F15 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $424.46 to $425.44. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 17

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 359,191

F14 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $423.41 to $424.38. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 16

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 360,660

F13 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $422.41 to $423.37. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 15

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 363,104

F12 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $421.37 to $422.35. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 14

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 365,991

F11 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $420.35 to $421.30. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 13

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 368,891

F10 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $419.33 to $420.31. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 12

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 370,391

F9 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $418.22 to $419.10. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 11

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 371,483

F8 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $417.22 to $418.18. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 10

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 372,291

F7 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $416.18 to $417.14. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 9

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 373,391

F6 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $414.85 to $415.69. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 8

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 374,191

F5 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $413.57 to $414.29. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 7

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 374,491

F4 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $412.05 to $412.40. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 6

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 374,791

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 5

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 374,891

F3 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $409.03 to $409.33. 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: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 4

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 375,091

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 3

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 375,191

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 2

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 375,291

F2 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $400.14 to $400.53. 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.

SEC source: 0001137789-26-000076 · wk-form4_1775163217.xml · nonDerivative · entry 1

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 375,491

F1 · shares: All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025.

SEC source: 0001137789-26-000074 · wk-form4_1774297204.xml · nonDerivative · entry 1

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 375,591

F1 · kind: The reported transaction reflects the contribution of issuer securities to an exchange fund in exchange for interest in the exchange fund. For purposes of Section 16, the transaction is being reported as a sale. The value of the securities contributed, and the corresponding interest received, was determined based on closing stock price of the issuer's common stock on March 18, 2026, with an aggregate value of approximately $10,000,000.

F1 · price: The reported transaction reflects the contribution of issuer securities to an exchange fund in exchange for interest in the exchange fund. For purposes of Section 16, the transaction is being reported as a sale. The value of the securities contributed, and the corresponding interest received, was determined based on closing stock price of the issuer's common stock on March 18, 2026, with an aggregate value of approximately $10,000,000.

SEC source: 0001137789-26-000072 · wk-form4_1773693032.xml · nonDerivative · entry 1

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,580

F1 · shares: These Ordinary Shares were sold under a Rule 10b5-1 trading plan adopted by the Reporting Person on June 1, 2025.

SEC source: 0001137789-26-000070 · wk-form4_1773346309.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,934

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.

F1 · derivative.exercise_date: Consists of a grant of RSUs awarded to the reporting person under the Seagate Technology plc 2022 Equity Incentive Plan subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter vested starting on September 11, 2024 and then in equal quarterly installments thereafter.

F1 · derivative.expiration_date: Consists of a grant of RSUs awarded to the reporting person under the Seagate Technology plc 2022 Equity Incentive Plan subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter vested starting on September 11, 2024 and then in equal quarterly installments thereafter.

SEC source: 0001137789-26-000070 · wk-form4_1773346309.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,248

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: 0001137789-26-000069 · wk-form4_1773346299.xml · derivative · entry 3

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,170

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 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001137789-26-000069 · wk-form4_1773346299.xml · nonDerivative · entry 2

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,335

SEC source: 0001137789-26-000069 · wk-form4_1773346299.xml · nonDerivative · entry 1

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,182

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: 0001137789-26-000068 · wk-form4_1773346291.xml · derivative · entry 2

Chong Kian Fatt · CIK 0001987421 · EVP Global Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,070

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 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001137789-26-000068 · wk-form4_1773346291.xml · nonDerivative · entry 1

Chong Kian Fatt · CIK 0001987421 · EVP Global Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,259

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: 0001137789-26-000066 · wk-form4_1773346274.xml · derivative · entry 3

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,914

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 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001137789-26-000066 · wk-form4_1773346274.xml · nonDerivative · entry 2

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 400,175

SEC source: 0001137789-26-000066 · wk-form4_1773346274.xml · nonDerivative · entry 1

MOSLEY WILLIAM D · CIK 0001388390 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 401,833

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: 0001137789-26-000067 · wk-form4_1773346283.xml · derivative · entry 3

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,652

Underlying: Ordinary Shares · 942 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 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.

F1 · derivative.expiration_date: 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.

SEC source: 0001137789-26-000067 · wk-form4_1773346283.xml · nonDerivative · entry 2

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,692

SEC source: 0001137789-26-000067 · wk-form4_1773346283.xml · nonDerivative · entry 1

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,122

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: 0001137789-26-000060 · wk-form4_1773260038.xml · derivative · entry 6

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,317

Underlying: Ordinary Shares · 631 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 the 2022 Plan. Subject to the Reporting Person's continuous employment, one-quarter 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 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the 2022 Plan. Subject to the Reporting Person's continuous employment, one-quarter 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: 0001137789-26-000060 · wk-form4_1773260038.xml · derivative · entry 5

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 999

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.

F1 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares 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.

F1 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares 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: 0001137789-26-000060 · wk-form4_1773260038.xml · nonDerivative · entry 4

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,180

SEC source: 0001137789-26-000060 · wk-form4_1773260038.xml · nonDerivative · entry 3

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,468

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: 0001137789-26-000060 · wk-form4_1773260038.xml · nonDerivative · entry 2

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,837

SEC source: 0001137789-26-000060 · wk-form4_1773260038.xml · nonDerivative · entry 1

Morris John Christopher · CIK 0001988271 · EVP & CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,065

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: 0001137789-26-000059 · wk-form4_1773260029.xml · derivative · entry 6

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,158

Underlying: Ordinary Shares · 1,515 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 the 2022 Plan. Subject to the Reporting Person's continuous employment, one-quarter 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 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the 2022 Plan. Subject to the Reporting Person's continuous employment, one-quarter 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: 0001137789-26-000059 · wk-form4_1773260029.xml · derivative · entry 5

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,918

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.

F1 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares 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.

F1 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares 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: 0001137789-26-000059 · wk-form4_1773260029.xml · nonDerivative · entry 4

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,487

SEC source: 0001137789-26-000059 · wk-form4_1773260029.xml · nonDerivative · entry 3

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,244

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: 0001137789-26-000059 · wk-form4_1773260029.xml · nonDerivative · entry 2

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,729

SEC source: 0001137789-26-000059 · wk-form4_1773260029.xml · nonDerivative · entry 1

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,208

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.