STX

SEC source: 0001137789-22-000068 · wf-form4_166311871854653.xml · derivative · entry 10

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,475

Underlying: Ordinary Shares · 3,475 shares

Expires not disclosed

F8 · 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, such RSUs vest in full on September 9, 2023.

F8 · 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, such RSUs vest in full on September 9, 2023.

SEC source: 0001137789-22-000068 · wf-form4_166311871854653.xml · derivative · entry 9

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,560

Underlying: Ordinary Shares · 25,560 shares

Expires not disclosed

F7 · 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 will vest on September 9, 2023 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2023.

F7 · derivative.expiration_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 will vest on September 9, 2023 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2023.

SEC source: 0001137789-22-000068 · wf-form4_166311871854653.xml · derivative · entry 8

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,223

Underlying: Ordinary Shares · 1,407 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_price: Each restricted share unit ("RSU") represents a contingent right to receive one Ordinary Share of the Issuer.

F6 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2022 and each one year anniversary thereafter.

F6 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2022 and each one year anniversary thereafter.

SEC source: 0001137789-22-000068 · wf-form4_166311871854653.xml · derivative · entry 7

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,928

Underlying: Ordinary Shares · 3,464 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_price: Each restricted share unit ("RSU") represents a contingent right to receive one Ordinary Share of the Issuer.

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, such RSUs vest as to one-quarter of the shares on September 9, 2021 and each one year anniversary thereafter.

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, such RSUs vest as to one-quarter of the shares on September 9, 2021 and each one year anniversary thereafter.

SEC source: 0001137789-22-000068 · wf-form4_166311871854653.xml · derivative · entry 6

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,340

Underlying: Ordinary Shares · 2,340 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_price: Each restricted share unit ("RSU") represents a contingent right to receive one Ordinary Share of the Issuer.

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, such RSUs vest as to one-quarter of the shares on September 9, 2020 and each one-year anniversary thereafter.

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, such RSUs vest as to one-quarter of the shares on September 9, 2020 and each one-year anniversary thereafter.

SEC source: 0001137789-22-000068 · wf-form4_166311871854653.xml · nonDerivative · entry 4

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,746

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: 0001137789-22-000068 · wf-form4_166311871854653.xml · nonDerivative · entry 3

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,339

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: 0001137789-22-000068 · wf-form4_166311871854653.xml · nonDerivative · entry 2

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,875

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: 0001137789-22-000066 · wf-form4_166311857301542.xml · derivative · entry 14

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,800

Underlying: Ordinary Shares · 2,800 shares

Expires not disclosed

F11 · 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, such RSUs vest in full on September 9, 2023.

F11 · 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, such RSUs vest in full on September 9, 2023.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · derivative · entry 13

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,985

Underlying: Ordinary Shares · 7,985 shares

Expires not disclosed

F10 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2023 and each quarter thereafter.

F10 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2023 and each quarter thereafter.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · derivative · entry 11

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,655

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.

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer.

F8 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2022 and each one-year anniversary thereafter.

F8 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2022 and each one-year anniversary thereafter.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · derivative · entry 10

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,696

Underlying: Ordinary Shares · 3,847 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_price: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer.

F7 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2021 and each one-year anniversary thereafter.

F7 · 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, such RSUs vest as to one-quarter of the shares on September 9, 2021 and each one-year anniversary thereafter.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · derivative · entry 9

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,808

Underlying: Ordinary Shares · 1,807 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_price: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer.

F6 · 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 "Plan"). Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on September 9, 2020 and each one-year anniversary thereafter.

F6 · 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 "Plan"). Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on September 9, 2020 and each one-year anniversary thereafter.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · nonDerivative · entry 7

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,095

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: 0001137789-22-000066 · wf-form4_166311857301542.xml · nonDerivative · entry 6

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,187

F4 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of securities previously reported on one or more Forms 4 by the Reporting Person in accordance with Rule 16b-3.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · nonDerivative · entry 5

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,907

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: 0001137789-22-000066 · wf-form4_166311857301542.xml · nonDerivative · entry 4

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,022

F4 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of securities previously reported on one or more Forms 4 by the Reporting Person in accordance with Rule 16b-3.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · nonDerivative · entry 3

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,353

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: 0001137789-22-000066 · wf-form4_166311857301542.xml · nonDerivative · entry 2

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,506

F4 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of securities previously reported on one or more Forms 4 by the Reporting Person in accordance with Rule 16b-3.

SEC source: 0001137789-22-000066 · wf-form4_166311857301542.xml · nonDerivative · entry 1

SCHUELKE KATHERINE · CIK 0001209874 · SVP, CLO & Corporate Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,131

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 176 Ordinary Shares purchased by Reporting Person on July 30, 2021 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.

F2 · balance_after: Includes 132 Ordinary Shares purchased by Reporting Person on January 21, 2022 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.

F3 · balance_after: Includes 123 Ordinary Shares purchased by Reporting Person on July 29, 2022 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: 0001137789-22-000064 · wf-form4_166311842505778.xml · derivative · entry 9

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 228,080

Underlying: Ordinary Shares · 120,080 shares

Expires not disclosed

F7 · 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 will vest on September 9, 2023 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2023.

F7 · derivative.expiration_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 will vest on September 9, 2023 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2023.

SEC source: 0001137789-22-000064 · wf-form4_166311842505778.xml · derivative · entry 8

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,540

Underlying: Ordinary Shares · 10,540 shares

Expires not disclosed

F6 · 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, such RSUs vest in full on September 9, 2023.

F6 · 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, such RSUs vest in full on September 9, 2023.

SEC source: 0001137789-22-000064 · wf-form4_166311842505778.xml · derivative · entry 7

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,030

Underlying: Ordinary Shares · 45,030 shares

Expires not disclosed

F5 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on September 9, 2023 and each quarter thereafter.

F5 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on September 9, 2023 and each quarter thereafter.

SEC source: 0001137789-22-000064 · wf-form4_166311842505778.xml · derivative · entry 6

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,019

Underlying: Ordinary Shares · 9,006 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_price: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer.

F4 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on September 9, 2022 and each one-year anniversary thereafter.

F4 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on September 9, 2022 and each one-year anniversary thereafter.

SEC source: 0001137789-22-000064 · wf-form4_166311842505778.xml · nonDerivative · entry 4

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 553,713

F1 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of securities previously reported on one or more Forms 4 by the Reporting Person in accordance with Rule 16b-3.

SEC source: 0001137789-22-000064 · wf-form4_166311842505778.xml · nonDerivative · entry 3

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 558,179

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: 0001137789-22-000064 · wf-form4_166311842505778.xml · nonDerivative · entry 2

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 549,173

F1 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of securities previously reported on one or more Forms 4 by the Reporting Person in accordance with Rule 16b-3.

SEC source: 0001137789-22-000064 · wf-form4_166311842505778.xml · nonDerivative · entry 1

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 556,940

F1 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of securities previously reported on one or more Forms 4 by the Reporting Person in accordance with Rule 16b-3.

F2 · balance_after: Includes 8 Ordinary Shares purchased by Reporting Person on July 29, 2022 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: 0001137789-22-000059 · wf-form4_166146675683818.xml · derivative · entry 1

CLEMMER RICHARD L · CIK 0001222781 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 577

Underlying: Ordinary Shares · 577 shares

Expires not disclosed

F1 · derivative.exercise_date: Consists of a grant of restricted share units (RSUs) awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan for no consideration. Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. Subject to the Reporting Person's continuous service with the Issuer, shares will be released to the Reporting Person on the earlier of (i) one year from the date of grant and (ii) the date of the next annual general meeting of shareholders of the Issuer following the end of the fiscal year ending on June 30, 2023, provided such annual general meeting is at least fifty (50) weeks after the immediately preceding fiscal year's annual general meeting.

F1 · derivative.expiration_date: Consists of a grant of restricted share units (RSUs) awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan for no consideration. Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. Subject to the Reporting Person's continuous service with the Issuer, shares will be released to the Reporting Person on the earlier of (i) one year from the date of grant and (ii) the date of the next annual general meeting of shareholders of the Issuer following the end of the fiscal year ending on June 30, 2023, provided such annual general meeting is at least fifty (50) weeks after the immediately preceding fiscal year's annual general meeting.

SEC source: 0001137789-22-000045 · wf-form4_165888290930818.xml · nonDerivative · entry 1

Teh Ban Seng · CIK 0001801425 · EVP, Global Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,748

F1 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 1,758 of the 7,030 Threshold Performance Share Units granted to Mr. Teh on March 22, 2021. The 1,758 Ordinary Shares will vest on March 22, 2023, subject to continuous service through such date.

F2 · balance_after: Includes 280 Ordinary Shares purchased by Reporting Person on January 31, 2022 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: 0001137789-22-000049 · wf-form4_165888674826205.xml · nonDerivative · entry 3

Nygaard Jeffrey D. · CIK 0001720273 · EVP, Operations and Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,399

F4 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 3,629 of the 14,515 Threshold Performance Share Units granted to Mr. Nygaard on September 9, 2020. The 3,629 Ordinary Shares will vest on September 9, 2022, subject to continuous service through such date.

SEC source: 0001137789-22-000049 · wf-form4_165888674826205.xml · nonDerivative · entry 2

Nygaard Jeffrey D. · CIK 0001720273 · EVP, Operations and Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,770

F3 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 3,614 of the 14,458 Threshold Performance Share Units granted to Mr. Nygaard on September 9, 2019. The 3,614 Ordinary Shares will vest on September 9, 2022, subject to continuous service through such date.

SEC source: 0001137789-22-000049 · wf-form4_165888674826205.xml · nonDerivative · entry 1

Nygaard Jeffrey D. · CIK 0001720273 · EVP, Operations and Technology

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,156

F1 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 5,965 of the 23,862 Threshold Performance Share Units granted to Mr. Nygaard on September 10, 2018. The 5,965 Ordinary Shares will vest on September 10, 2022, subject to continuous service through such date.

F2 · balance_after: Includes 191 Ordinary Shares purchased by Reporting Person on January 31, 2022 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: 0001137789-22-000047 · wf-form4_165888308527791.xml · nonDerivative · entry 3

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,171

F3 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 3,629 of the 14,515 Threshold Performance Share Units granted to Mr. Romano on September 9, 2020. The 3,629 Ordinary Shares will vest on September 9, 2022, subject to continuous service through such date.

SEC source: 0001137789-22-000047 · wf-form4_165888308527791.xml · nonDerivative · entry 2

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,542

F2 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 3,614 of the 14,458 Threshold Performance Share Units granted to Mr. Romano on September 9, 2019. The 3,614 Ordinary Shares will vest on September 9, 2022, subject to continuous service through such date.

SEC source: 0001137789-22-000047 · wf-form4_165888308527791.xml · nonDerivative · entry 1

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,928

F1 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 6,537 of the 26,150 Threshold Performance Share Units granted to Mr. Romano on February 20, 2019. The 6,537 Ordinary Shares will vest on February 20, 2023, subject to continuous service through such date.

SEC source: 0001137789-22-000043 · wf-form4_165888268067449.xml · nonDerivative · entry 3

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 563,381

F4 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 15,665 of the 62,660 Threshold Performance Share Units granted to Mr. Mosley on September 9, 2020. The 15,665 Ordinary Shares will vest on September 9, 2022, subject to continuous service through such date

SEC source: 0001137789-22-000043 · wf-form4_165888268067449.xml · nonDerivative · entry 2

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 547,716

F3 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 13,007 of the 52,027 Threshold Performance Share Units granted to Mr. Mosley on September 9, 2019. The 13,007 Ordinary Shares will vest on September 9, 2022, subject to continuous service through such date.

SEC source: 0001137789-22-000043 · wf-form4_165888268067449.xml · nonDerivative · entry 1

MOSLEY WILLIAM D · CIK 0001388390 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 534,709

F1 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 12,676 of the 50,706 Threshold Performance Share Units granted to Mr. Mosley on September 10, 2018. The 12,676 Ordinary Shares will vest on September 10, 2022, subject to continuous service through such date.

F2 · balance_after: Includes 272 Ordinary Shares purchased by Reporting Person on January 31, 2022 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: 0001137789-22-000041 · wf-form4_165888251032472.xml · nonDerivative · entry 1

Naik Ravi · CIK 0001845312 · EVP & CIO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,133

F1 · shares: On July 24, 2022, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 2,813 of the 11,250 Threshold Performance Share Units granted to Mr. Naik on March 22, 2021. The 2,813 Ordinary Shares will vest on March 22, 2023, subject to continuous service through such date.

SEC source: 0001137789-22-000034 · wf-form4_165342962991253.xml · derivative · entry 3

Fochtman Jeffrey D. · CIK 0001811019 · SVP, Business & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,016

Underlying: Ordinary Shares · 1,007 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_price: Each restricted share unit ("RSU") represents a contingent right to receive one Ordinary Share of the Issuer.

F3 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on May 20, 2021 and each one-year anniversary thereafter.

F3 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on May 20, 2021 and each one-year anniversary thereafter.

SEC source: 0001137789-22-000034 · wf-form4_165342962991253.xml · nonDerivative · entry 2

Fochtman Jeffrey D. · CIK 0001811019 · SVP, Business & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,204

F1 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of Restricted Share Units ("RSUs").

SEC source: 0001137789-22-000034 · wf-form4_165342962991253.xml · nonDerivative · entry 1

Fochtman Jeffrey D. · CIK 0001811019 · SVP, Business & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,555

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: 0001137789-22-000024 · wf-form4_164815509834241.xml · nonDerivative · entry 1

Naik Ravi · CIK 0001845312 · EVP & CIO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,320

F1 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of securities previously reported on one or more Forms 4 by the Reporting Person in accordance with Rule 16b-3.

F2 · balance_after: Includes 259 Ordinary Shares purchased by Reporting Person on January 31, 2022 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: 0001137789-22-000022 · wf-form4_164678319150090.xml · nonDerivative · entry 1

LUCZO STEPHEN J · CIK 0001248260 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Stephen J. Luczo Revocable Trust dated January 26, 2001

Disclosed balance after: 225,941

F1 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $102.96 to $103.58. 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: 0001418812-22-000017 · primary_doc.xml · nonDerivative · entry 3

ValueAct Holdings, L.P. · CIK 0001418814 · Director · See Remarks

ValueAct Capital Master Fund, L.P. · CIK 0001464912 · Director · See Remarks

VA Partners I, LLC · CIK 0001418812 · Director · See Remarks

ValueAct Capital Management, L.P. · CIK 0001351069 · Director · See Remarks

ValueAct Capital Management, LLC · CIK 0001351073 · Director · See Remarks

ValueAct Holdings II, L.P. · CIK 0001763309 · Director · See Remarks

ValueAct Holdings GP, LLC · CIK 0001418813 · Director · See Remarks

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes.

Disclosed balance after: 13,437,070

F1 · ownership.nature: Each reporting person listed herein disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein, and this report shall not be deemed an admission that such person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

F2 · ownership.nature: The securities reported herein are held by ValueAct Capital Master Fund, L.P. and may be deemed to be indirectly beneficially owned by (i) VA Partners I, LLC as General Partner of ValueAct Capital Master Fund, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P., (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P., (iv) ValueAct Holdings, L.P. as the majority owner of the membership interests of VA Partners I, LLC, (v) ValueAct Holdings II, L.P. as the sole owner of the membership interests of ValueAct Capital Management, LLC and as the majority owner of the limited partnership interests of ValueAct Capital Management, L.P., and (vi) ValueAct Holdings GP, LLC as General Partner of ValueAct Holdings, L.P. and ValueAct Holdings II, L.P.

SEC source: 0001137789-22-000020 · wf-form4_164573681614410.xml · derivative · entry 11

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,450

Underlying: Ordinary Shares · 18,725 shares

Expires 2025-02-22

F10 · derivative.exercise_price: Each performance-based restricted share unit ("PSU") represents a contingent right to receive one Ordinary Share. The PSUs shall vest on the date that is the later of (i) the written certification by the Compensation Committee of the level of achievement of the performance goal, and (ii) the three (3) year anniversary of the date of grant, based on the extent to which the closing price of a Company Ordinary Share meets or exceeds one of the 30-day share price targets set forth in the PSU award agreement at any time during the 3-year performance period beginning on February 22, 2022 and extending through February 22, 2025, subject to the Reporting Person's continuous employment. The ultimate number of Ordinary Shares to be earned will be determined at the end of the 3-year performance period and could range from 0% to 200% of the target number of PSUs granted to the Reporting Person.

F10 · derivative.exercise_date: Each performance-based restricted share unit ("PSU") represents a contingent right to receive one Ordinary Share. The PSUs shall vest on the date that is the later of (i) the written certification by the Compensation Committee of the level of achievement of the performance goal, and (ii) the three (3) year anniversary of the date of grant, based on the extent to which the closing price of a Company Ordinary Share meets or exceeds one of the 30-day share price targets set forth in the PSU award agreement at any time during the 3-year performance period beginning on February 22, 2022 and extending through February 22, 2025, subject to the Reporting Person's continuous employment. The ultimate number of Ordinary Shares to be earned will be determined at the end of the 3-year performance period and could range from 0% to 200% of the target number of PSUs granted to the Reporting Person.

SEC source: 0001137789-22-000020 · wf-form4_164573681614410.xml · derivative · entry 10

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,725

Underlying: Ordinary Shares · 18,725 shares

Expires 2023-02-22

F7 · derivative.exercise_price: Each restricted share unit ("RSU") represents a contingent right to receive one Ordinary Share of the Issuer.

F9 · 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, 100% of such RSUs will vest on the first anniversary of the grant date, February 22, 2023.

SEC source: 0001137789-22-000020 · wf-form4_164573681614410.xml · derivative · entry 9

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,170

Underlying: Ordinary Shares · 56,170 shares

Expires 2026-02-22

F7 · derivative.exercise_price: Each restricted share unit ("RSU") represents a contingent right to receive one Ordinary Share of the Issuer.

F8 · 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 vest as to one-quarter of the shares on February 22, 2023, and each one year anniversary thereafter.

SEC source: 0001137789-22-000020 · wf-form4_164573681614410.xml · derivative · entry 8

Romano Gianluca · CIK 0001764650 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,994

Underlying: Ordinary Shares · 4,031 shares

Expires 2027-09-09

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.

F6 · derivative.exercise_date: Options granted to the Reporting Person under the 2012 Plan are subject to a four-year vesting schedule. One quarter of the options vested on September 9, 2021. Subject to continuous employment, the remaining options vest in equal monthly installments over the 36 months following September 9, 2021.

F6 · derivative.expiration_date: Options granted to the Reporting Person under the 2012 Plan are subject to a four-year vesting schedule. One quarter of the options vested on September 9, 2021. Subject to continuous employment, the remaining options vest in equal monthly installments over the 36 months following September 9, 2021.