STX

SEC source: 0001137789-20-000129 · wf-form4_160738235019522.xml · nonDerivative · entry 5

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,644

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: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000129 · wf-form4_160738235019522.xml · nonDerivative · entry 4

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,644

F1 · shares: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000129 · wf-form4_160738235019522.xml · nonDerivative · entry 3

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,644

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: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000129 · wf-form4_160738235019522.xml · nonDerivative · entry 2

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,644

F1 · shares: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000129 · wf-form4_160738235019522.xml · nonDerivative · entry 1

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,644

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: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000128 · wf-form4_160738209384869.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: 522,199

F1 · price: These Ordinary Shares were sold in multiple trades at prices ranging from $62.37 to $62.62. 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: 0001137789-20-000125 · wf-form4_160695566163070.xml · derivative · entry 7

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,810

Underlying: Ordinary Shares · 10,000 shares

Expires 2024-11-20

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 Seagate Technology plc 2012 Equity Incentive Plan are subject to a four-year vesting schedule. One quarter of the options vested on November 20, 2018. Subject to continuous employment, the remaining options will vest in equal monthly installments over the 36 months following November 20, 2018.

SEC source: 0001137789-20-000125 · wf-form4_160695566163070.xml · derivative · entry 6

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,310

Underlying: Ordinary Shares · 5,000 shares

Expires 2023-09-09

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.

F2 · derivative.exercise_date: Options granted to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan are subject to a four-year vesting schedule. One quarter of the options vested on September 9, 2017. The remaining options vested in equal monthly installments over the 36 months following September 9, 2017.

SEC source: 0001137789-20-000125 · wf-form4_160695566163070.xml · nonDerivative · entry 4

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,644

F1 · shares: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000125 · wf-form4_160695566163070.xml · nonDerivative · entry 3

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,644

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: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000125 · wf-form4_160695566163070.xml · nonDerivative · entry 2

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,644

F1 · shares: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000125 · wf-form4_160695566163070.xml · nonDerivative · entry 1

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,644

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: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000123 · wf-form4_160634905703880.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: 542,199

F1 · shares: Represents Ordinary Shares donated by Reporting Person's trust as a gift to Fidelity Investments Charitable Gift Fund, a donor advised fund.

SEC source: 0001137789-20-000122 · wf-form4_160634899766945.xml · derivative · entry 4

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,310

Underlying: Ordinary Shares · 5,000 shares

Expires 2023-09-09

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.

F2 · derivative.exercise_date: Options granted to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan are subject to a four-year vesting schedule. One quarter of the options vested on September 9, 2017. The remaining options vested in equal monthly installments over the 36 months following September 9, 2017.

SEC source: 0001137789-20-000122 · wf-form4_160634899766945.xml · nonDerivative · entry 2

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,644

F1 · shares: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000122 · wf-form4_160634899766945.xml · nonDerivative · entry 1

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,644

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: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000119 · wf-form4_160626062483688.xml · derivative · entry 5

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,809

Underlying: Ordinary Shares · 4,145 shares

Expires 2024-09-11

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.

F3 · derivative.exercise_date: Options granted to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan are subject to a four-year vesting schedule. One quarter of the options vested on September 11, 2018. Subject to continuous employment, the remaining options will vest in equal monthly installments over the 36 months following September 11, 2018.

SEC source: 0001137789-20-000119 · wf-form4_160626062483688.xml · nonDerivative · entry 3

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,644

F2 · shares: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000119 · wf-form4_160626062483688.xml · nonDerivative · entry 2

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,789

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 · shares: The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

SEC source: 0001137789-20-000119 · wf-form4_160626062483688.xml · nonDerivative · entry 1

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,644

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: 0001137789-20-000111 · wf-form4_160349446926115.xml · derivative · entry 4

COLEMAN WILLIAM T III · CIK 0001055401 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F3 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F3 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001137789-20-000113 · wf-form4_160349460637121.xml · derivative · entry 4

BRUNER JUDY · CIK 0001112668 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F4 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F4 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001418812-20-000076 · primary_doc.xml · derivative · entry 6

Haggart Dylan G. · CIK 0001684185 · Director · 10% owner · See Remarks

ValueAct Holdings, L.P. · CIK 0001418814 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund, L.P. · CIK 0001464912 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund B, L.P. · CIK 0001759805 · Director · 10% owner · See Remarks

VA Partners I, LLC · CIK 0001418812 · Director · 10% owner · See Remarks

ValueAct Capital Management, L.P. · CIK 0001351069 · Director · 10% owner · See Remarks

ValueAct Capital Management, LLC · CIK 0001351073 · Director · 10% owner · See Remarks

ValueAct Holdings II, L.P. · CIK 0001763309 · Director · 10% owner · See Remarks

ValueAct Holdings GP, LLC · CIK 0001418813 · Director · 10% owner · See Remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F7 · derivative.exercise_date: Consists of a grant of RSUs awarded to Mr. Haggart under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. Subject to Mr. Haggart's continuous service with the Issuer, shares will be released to Mr. Haggart on the earlier of (i) one year from the date of grant and (ii) the date of the next annual general meeting of shareholders which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F7 · derivative.expiration_date: Consists of a grant of RSUs awarded to Mr. Haggart under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. Subject to Mr. Haggart's continuous service with the Issuer, shares will be released to Mr. Haggart on the earlier of (i) one year from the date of grant and (ii) the date of the next annual general meeting of shareholders which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F1 · ownership.direct: The ValueAct entities referred to in this footnote 1 are collectively referred to herein as "ValueAct Capital." Under an agreement with ValueAct Capital, Dylan G. Haggart is deemed to hold the shares for the benefit of the limited partners of ValueAct Capital Master Fund, L.P. and indirectly for (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.

F2 · ownership.direct: 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.

SEC source: 0001137789-20-000114 · wf-form4_160349466818457.xml · derivative · entry 4

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F5 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F5 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001137789-20-000112 · wf-form4_160349453179818.xml · derivative · entry 5

CANNON MICHAEL R · CIK 0001201489 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F3 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F3 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001137789-20-000109 · wf-form4_160349432764987.xml · derivative · entry 4

LUCZO STEPHEN J · CIK 0001248260 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F4 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F4 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001137789-20-000110 · wf-form4_160349439554775.xml · derivative · entry 4

Geldmacher Jay L · CIK 0001462488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F3 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F3 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001137789-20-000108 · wf-form4_160349426708914.xml · derivative · entry 4

Tilenius Stephanie · CIK 0001534995 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F3 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F3 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001137789-20-000107 · wf-form4_160349420489086.xml · derivative · entry 4

ZANDER EDWARD J · CIK 0001251587 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,847

Underlying: Ordinary Shares · 5,847 shares

Expires not disclosed

F4 · derivative.exercise_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

F4 · derivative.expiration_date: Consists of a grant of RSUs awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 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 which is at least fifty (50) weeks after the immediately preceding year's annual meeting.

SEC source: 0001137789-20-000111 · wf-form4_160349446926115.xml · derivative · entry 3

COLEMAN WILLIAM T III · CIK 0001055401 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,579 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: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

F2 · derivative.expiration_date: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

SEC source: 0001137789-20-000111 · wf-form4_160349446926115.xml · nonDerivative · entry 2

COLEMAN WILLIAM T III · CIK 0001055401 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,483

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

SEC source: 0001137789-20-000111 · wf-form4_160349446926115.xml · nonDerivative · entry 1

COLEMAN WILLIAM T III · CIK 0001055401 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,492

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: 0001137789-20-000113 · wf-form4_160349460637121.xml · derivative · entry 3

BRUNER JUDY · CIK 0001112668 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,579 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: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

F3 · derivative.expiration_date: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

SEC source: 0001137789-20-000113 · wf-form4_160349460637121.xml · nonDerivative · entry 2

BRUNER JUDY · CIK 0001112668 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · The Bruner Living Trust

Disclosed balance after: 10,245

F2 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of Restricted Share Units ("RSUs").

F1 · balance_after: On October 22, 2020, the Reporting Person transferred 3,570 Ordinary Shares previously owned directly (5,579 Ordinary Shares vested on October 21, 2020 minus 2,009 Ordinary Shares withheld to cover tax liabilities) to The Bruner Living Trust.

SEC source: 0001137789-20-000113 · wf-form4_160349460637121.xml · nonDerivative · entry 1

BRUNER JUDY · CIK 0001112668 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,579

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: On October 22, 2020, the Reporting Person transferred 3,570 Ordinary Shares previously owned directly (5,579 Ordinary Shares vested on October 21, 2020 minus 2,009 Ordinary Shares withheld to cover tax liabilities) to The Bruner Living Trust.

SEC source: 0001418812-20-000076 · primary_doc.xml · derivative · entry 5

Haggart Dylan G. · CIK 0001684185 · Director · 10% owner · See Remarks

ValueAct Holdings, L.P. · CIK 0001418814 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund, L.P. · CIK 0001464912 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund B, L.P. · CIK 0001759805 · Director · 10% owner · See Remarks

VA Partners I, LLC · CIK 0001418812 · Director · 10% owner · See Remarks

ValueAct Capital Management, L.P. · CIK 0001351069 · Director · 10% owner · See Remarks

ValueAct Capital Management, LLC · CIK 0001351073 · Director · 10% owner · See Remarks

ValueAct Holdings II, L.P. · CIK 0001763309 · Director · 10% owner · See Remarks

ValueAct Holdings GP, LLC · CIK 0001418813 · Director · 10% owner · See Remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,579 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: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending July 3, 2020.

F6 · derivative.expiration_date: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending July 3, 2020.

F1 · ownership.direct: The ValueAct entities referred to in this footnote 1 are collectively referred to herein as "ValueAct Capital." Under an agreement with ValueAct Capital, Dylan G. Haggart is deemed to hold the shares for the benefit of the limited partners of ValueAct Capital Master Fund, L.P. and indirectly for (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.

F2 · ownership.direct: 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.

SEC source: 0001418812-20-000076 · primary_doc.xml · nonDerivative · entry 2

Haggart Dylan G. · CIK 0001684185 · Director · 10% owner · See Remarks

ValueAct Holdings, L.P. · CIK 0001418814 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund, L.P. · CIK 0001464912 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund B, L.P. · CIK 0001759805 · Director · 10% owner · See Remarks

VA Partners I, LLC · CIK 0001418812 · Director · 10% owner · See Remarks

ValueAct Capital Management, L.P. · CIK 0001351069 · Director · 10% owner · See Remarks

ValueAct Capital Management, LLC · CIK 0001351073 · Director · 10% owner · See Remarks

ValueAct Holdings II, L.P. · CIK 0001763309 · Director · 10% owner · See Remarks

ValueAct Holdings GP, LLC · CIK 0001418813 · Director · 10% owner · See Remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,863

F3 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of Restricted Share Units ("RSUs").

F1 · ownership.direct: The ValueAct entities referred to in this footnote 1 are collectively referred to herein as "ValueAct Capital." Under an agreement with ValueAct Capital, Dylan G. Haggart is deemed to hold the shares for the benefit of the limited partners of ValueAct Capital Master Fund, L.P. and indirectly for (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.

F2 · ownership.direct: 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.

SEC source: 0001418812-20-000076 · primary_doc.xml · nonDerivative · entry 1

Haggart Dylan G. · CIK 0001684185 · Director · 10% owner · See Remarks

ValueAct Holdings, L.P. · CIK 0001418814 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund, L.P. · CIK 0001464912 · Director · 10% owner · See Remarks

ValueAct Capital Master Fund B, L.P. · CIK 0001759805 · Director · 10% owner · See Remarks

VA Partners I, LLC · CIK 0001418812 · Director · 10% owner · See Remarks

ValueAct Capital Management, L.P. · CIK 0001351069 · Director · 10% owner · See Remarks

ValueAct Capital Management, LLC · CIK 0001351073 · Director · 10% owner · See Remarks

ValueAct Holdings II, L.P. · CIK 0001763309 · Director · 10% owner · See Remarks

ValueAct Holdings GP, LLC · CIK 0001418813 · Director · 10% owner · See Remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,872

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 · ownership.direct: The ValueAct entities referred to in this footnote 1 are collectively referred to herein as "ValueAct Capital." Under an agreement with ValueAct Capital, Dylan G. Haggart is deemed to hold the shares for the benefit of the limited partners of ValueAct Capital Master Fund, L.P. and indirectly for (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.

F2 · ownership.direct: 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.

SEC source: 0001137789-20-000114 · wf-form4_160349466818457.xml · derivative · entry 3

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,579 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: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

F4 · derivative.expiration_date: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

SEC source: 0001137789-20-000114 · wf-form4_160349466818457.xml · nonDerivative · entry 2

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Adams Family Trust DTD 10/27/2000

Disclosed balance after: 15,543

F2 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of Restricted Share Units ("RSUs").

F1 · balance_after: On October 22, 2020, the Reporting Person transferred 3,570 Ordinary Shares previously owned directly (5,579 Ordinary Shares vested on October 21, 2020 minus 2,009 Ordinary Shares withheld to cover tax liabilities) to Mark Woolsey Adams and Maureen Madden Adams, Trustees Adams Family Trust DTD 10/27/2000 ("Adams Family Trust DTD 10/27/2000").

F3 · ownership.nature: All shares previously reported as directly held by the Reporting Person were transferred following acquisition to the Adams Family Trust DTD 10/27/2000, over which the Reporting Person serves as co-trustee.

SEC source: 0001137789-20-000114 · wf-form4_160349466818457.xml · nonDerivative · entry 1

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,579

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: On October 22, 2020, the Reporting Person transferred 3,570 Ordinary Shares previously owned directly (5,579 Ordinary Shares vested on October 21, 2020 minus 2,009 Ordinary Shares withheld to cover tax liabilities) to Mark Woolsey Adams and Maureen Madden Adams, Trustees Adams Family Trust DTD 10/27/2000 ("Adams Family Trust DTD 10/27/2000").

SEC source: 0001137789-20-000112 · wf-form4_160349453179818.xml · derivative · entry 4

CANNON MICHAEL R · CIK 0001201489 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,579 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: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

F2 · derivative.expiration_date: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

SEC source: 0001137789-20-000112 · wf-form4_160349453179818.xml · nonDerivative · entry 2

CANNON MICHAEL R · CIK 0001201489 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,277

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

SEC source: 0001137789-20-000112 · wf-form4_160349453179818.xml · nonDerivative · entry 1

CANNON MICHAEL R · CIK 0001201489 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,286

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: 0001137789-20-000109 · wf-form4_160349432764987.xml · derivative · entry 3

LUCZO STEPHEN J · CIK 0001248260 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,579 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: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending July 3, 2020.

F3 · derivative.expiration_date: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending July 3, 2020.

SEC source: 0001137789-20-000109 · wf-form4_160349432764987.xml · nonDerivative · entry 2

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: 552,199

F2 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of Restricted Share Units ("RSUs").

F1 · balance_after: On October 22, 2020, the Reporting Person transferred 3,570 Ordinary Shares previously owned directly (5,579 Ordinary Shares vested on October 21, 2020 minus 2,009 Ordinary Shares withheld to cover tax liabilities) to the Stephen J. Luczo Revocable Trust dated January 26, 2001.

SEC source: 0001137789-20-000109 · wf-form4_160349432764987.xml · nonDerivative · entry 1

LUCZO STEPHEN J · CIK 0001248260 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,579

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: On October 22, 2020, the Reporting Person transferred 3,570 Ordinary Shares previously owned directly (5,579 Ordinary Shares vested on October 21, 2020 minus 2,009 Ordinary Shares withheld to cover tax liabilities) to the Stephen J. Luczo Revocable Trust dated January 26, 2001.

SEC source: 0001137789-20-000110 · wf-form4_160349439554775.xml · derivative · entry 3

Geldmacher Jay L · CIK 0001462488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,579 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: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

F2 · derivative.expiration_date: Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. The award vested on the date prior to the annual general meeting of the shareholders of the Issuer following the end of the Issuer's fiscal year ended July 3, 2020.

SEC source: 0001137789-20-000110 · wf-form4_160349439554775.xml · nonDerivative · entry 2

Geldmacher Jay L · CIK 0001462488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,783

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

SEC source: 0001137789-20-000110 · wf-form4_160349439554775.xml · nonDerivative · entry 1

Geldmacher Jay L · CIK 0001462488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,792

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.