STX

SEC source: 0001137789-17-000098 · wf-form4_151216126308861.xml · nonDerivative · entry 1

ZANDER EDWARD J · CIK 0001251587 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · The Edward and Mona Zander Trust dtd 4/19/93

Disclosed balance after: 51,615

F1 · balance_after: The Reporting Person transferred 8,715 Ordinary Shares previously owned directly to The Edward and Mona Zander Trust dated 4/19/93.

SEC source: 0001137789-17-000093 · wf-form4_151155788796237.xml · nonDerivative · entry 1

Geldmacher Jay L · CIK 0001462488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,715

SEC source: 0001137789-18-000050 · wf-form5_153419918218768.xml · nonDerivative · entry 1

COLEMAN WILLIAM T III · CIK 0001055401 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,920

F1 · shares: On November 22, 2017, the Reporting Person gifted 5,399 Ordinary Shares.

SEC source: 0001137789-17-000091 · wf-form4_151138793612121.xml · derivative · entry 1

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 101,810

Underlying: Ordinary Shares · 101,810 shares

Expires 2024-11-20

F1 · derivative.exercise_date: Options granted to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan (the "Plan") are subject to a four-year vesting schedule. Subject to continuous employment, one quarter of the options will vest on November 20, 2018. The remaining options will vest in equal monthly installments over the 36 months following November 20, 2018.

SEC source: 0001137789-17-000089 · wf-form4_151017634034486.xml · nonDerivative · entry 1

BRACE PHILIP G · CIK 0001336507 · Former President, CSSG

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,069

SEC source: 0001137789-17-000087 · wf-form4_150949711876814.xml · derivative · entry 5

BRACE PHILIP G · CIK 0001336507 · Former President, CSSG

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 40,393 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.

SEC source: 0001137789-17-000087 · wf-form4_150949711876814.xml · nonDerivative · entry 4

BRACE PHILIP G · CIK 0001336507 · Former President, CSSG

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,472

SEC source: 0001137789-17-000087 · wf-form4_150949711876814.xml · nonDerivative · entry 3

BRACE PHILIP G · CIK 0001336507 · Former President, CSSG

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,023

SEC source: 0001137789-17-000087 · wf-form4_150949711876814.xml · nonDerivative · entry 2

BRACE PHILIP G · CIK 0001336507 · Former President, CSSG

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,023

F1 · price: These Ordinary Shares were sold in multiple transactions at sales prices ranging from $37.10 to $37.19, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in the footnote of this Form 4.

SEC source: 0001137789-17-000087 · wf-form4_150949711876814.xml · nonDerivative · entry 1

BRACE PHILIP G · CIK 0001336507 · Former President, CSSG

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,416

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: 0001137789-17-000085 · wf-form4_150948348762251.xml · nonDerivative · entry 1

Nygaard Jeffrey D. · CIK 0001720273 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Indirect · Jeffrey D. Nygaard Revocable Trust U/A Dated August 17, 2009

Disclosed balance after: 23,133

F1 · price: These Ordinary Shares were purchased in multiple transactions at purchase prices ranging from $36.89 to $37.74, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in the footnote of this Form 4.

SEC source: 0001137789-18-000011 · wf-form4_151563170593547.xml · nonDerivative · entry 1

LUCZO STEPHEN J · CIK 0001248260 · Director · Executive Chairman & COB

10b5-1 filing: Not disclosed

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

Disclosed balance after: 1,204,158

F1 · shares: On October 26, 2017, the Reporting Person gifted 10,000 Ordinary Shares from the Stephen J. Luczo Revocable Trust dated January 26, 2001.

SEC source: 0001137789-17-000080 · wf-form4_150897523764652.xml · nonDerivative · entry 2

Moyo Dambisa F · CIK 0001656418 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001137789-18-000016 · wf-form4_151753270266325.xml · nonDerivative · entry 1

PARK CHONG SUP · CIK 0001216771 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Park Family Trust

Disclosed balance after: 22,658

F1 · shares: On October 25, 2017 the Reporting Person gifted 3,000 Ordinary Shares from the Park Family Trust.

SEC source: 0001137789-17-000080 · wf-form4_150897523764652.xml · nonDerivative · entry 1

Moyo Dambisa F · CIK 0001656418 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,316

SEC source: 0001137789-17-000079 · wf-form4_150897514284398.xml · nonDerivative · entry 1

MORTON DAVID H JR · CIK 0001476070 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,561

F1 · shares: These Ordinary Shares were sold pursuant to a 10b5-1 Trading Plan adopted by the Reporting Person.

SEC source: 0001137789-17-000073 · wf-form4_150845459229622.xml · derivative · entry 2

COLEMAN WILLIAM T III · CIK 0001055401 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F2 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000078 · wf-form4_150845499190791.xml · derivative · entry 4

ZANDER EDWARD J · CIK 0001251587 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F2 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000077 · wf-form4_150845492267651.xml · derivative · entry 2

Tilenius Stephanie · CIK 0001534995 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F2 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000076 · wf-form4_150845483674653.xml · derivative · entry 3

PARK CHONG SUP · CIK 0001216771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F2 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000074 · wf-form4_150845468287666.xml · derivative · entry 2

Geldmacher Jay L · CIK 0001462488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F2 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000072 · wf-form4_150845450893473.xml · derivative · entry 2

CHENG MEI WEI · CIK 0001191529 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F2 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000071 · wf-form4_150845440737269.xml · derivative · entry 3

CANNON MICHAEL R · CIK 0001201489 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F2 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F2 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000069 · wf-form4_150845417187073.xml · derivative · entry 4

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,094

Underlying: Ordinary Shares · 8,094 shares

Expires not disclosed

F4 · derivative.exercise_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

F4 · derivative.expiration_date: Consists of a grant of restricted share units awarded to the Reporting Person under the Amended and Restated Seagate Technology plc 2012 Equity Incentive Plan for no consideration. Each restricted share unit 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) one day prior to the next annual general meeting of the shareholders of the Issuer following the end of the fiscal year ending on June 29, 2018.

SEC source: 0001137789-17-000073 · wf-form4_150845459229622.xml · nonDerivative · entry 1

COLEMAN WILLIAM T III · CIK 0001055401 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,319

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: 0001137789-17-000070 · wf-form4_150845430395335.xml · nonDerivative · entry 1

BIONDI FRANK · CIK 0001032669 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,399

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: On October 20, 2016, the Reporting Person transferred 3,316 ordinary shares previously owned directly to the Biondi Family Trust DTD 7/20/01.

SEC source: 0001137789-17-000078 · wf-form4_150845499190791.xml · nonDerivative · entry 1

ZANDER EDWARD J · CIK 0001251587 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,715

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: 0001137789-17-000077 · wf-form4_150845492267651.xml · nonDerivative · entry 1

Tilenius Stephanie · CIK 0001534995 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,425

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: 0001137789-17-000076 · wf-form4_150845483674653.xml · nonDerivative · entry 1

PARK CHONG SUP · CIK 0001216771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,715

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: 0001137789-17-000075 · wf-form4_150845477424579.xml · nonDerivative · entry 1

Moyo Dambisa F · CIK 0001656418 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,715

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: 0001137789-17-000074 · wf-form4_150845468287666.xml · nonDerivative · entry 1

Geldmacher Jay L · CIK 0001462488 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,080

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: 0001137789-17-000072 · wf-form4_150845450893473.xml · nonDerivative · entry 1

CHENG MEI WEI · CIK 0001191529 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,162

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: 0001137789-17-000071 · wf-form4_150845440737269.xml · nonDerivative · entry 1

CANNON MICHAEL R · CIK 0001201489 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,234

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: 0001137789-17-000069 · wf-form4_150845417187073.xml · derivative · entry 3

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 5,470 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 stock unit ("RSU") represents a contingent right to receive one share of Issuer's common stock.

F3 · derivative.exercise_date: This 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 June 30, 2017.

F3 · derivative.expiration_date: This 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 June 30, 2017.

SEC source: 0001137789-17-000069 · wf-form4_150845417187073.xml · nonDerivative · entry 2

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,500

F1 · shares: These Ordinary Shares are withheld securities to cover tax liabilities.

SEC source: 0001137789-17-000069 · wf-form4_150845417187073.xml · nonDerivative · entry 1

Adams Mark · CIK 0001349123 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,470

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: 0001137789-17-000055 · wf-form4_150550190298719.xml · nonDerivative · entry 2

MOSLEY WILLIAM D · CIK 0001388390 · Director · President & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 174,543

F2 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of the above-listed Performance Share Units in accordance with Rule 16b-3.

SEC source: 0001137789-17-000055 · wf-form4_150550190298719.xml · nonDerivative · entry 1

MOSLEY WILLIAM D · CIK 0001388390 · Director · President & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 182,214

F1 · shares: On September 13, 2017, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 14,700 of the 26,250 Performance Share Units granted to Mr. Mosley on September 9, 2014. Achievement of performance objectives resulted in the Reporting Person earning Ordinary Shares in the amount of 56% of the Performance Share Units granted. The 14,700 Ordinary Shares vested on September 13, 2017.

SEC source: 0001137789-17-000053 · wf-form4_150550179325500.xml · nonDerivative · entry 2

LUCZO STEPHEN J · CIK 0001248260 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,420

F2 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of the above-listed Performance Share Units in accordance with Rule 16b-3.

SEC source: 0001137789-17-000053 · wf-form4_150550179325500.xml · nonDerivative · entry 1

LUCZO STEPHEN J · CIK 0001248260 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 118,709

F1 · shares: On September 13, 2017, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 44,632 of the 79,700 Performance Share Units granted to Mr. Luczo on September 9, 2014. Achievement of performance objectives resulted in the Reporting Person earning Ordinary Shares in the amount of 56% of the Performance Share Units granted. The 44,632 Ordinary Shares vested on September 13, 2017.

SEC source: 0001137789-17-000054 · wf-form4_150550185076653.xml · nonDerivative · entry 2

MORTON DAVID H JR · CIK 0001476070 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,470

F2 · shares: These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of Performance Share Units in accordance with Rule 16b-3.

SEC source: 0001137789-17-000054 · wf-form4_150550185076653.xml · nonDerivative · entry 1

MORTON DAVID H JR · CIK 0001476070 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,596

F1 · shares: On September 13, 2017, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 2,156 of the 3,850 Performance Share Units granted to Mr. Morton on September 9, 2014. Achievement of performance objectives resulted in the Reporting Person earning Ordinary Shares in the amount of 56% of the Performance Share Units granted. The 2,156 Ordinary Shares vested on September 13, 2017.

SEC source: 0001137789-17-000052 · wf-form4_150526735399942.xml · derivative · entry 2

MURPHY JAMES J · CIK 0001234677 · EVP, Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,432

Underlying: Ordinary Shares · 87,432 shares

Expires 2024-09-11

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

SEC source: 0001137789-17-000052 · wf-form4_150526735399942.xml · derivative · entry 1

MURPHY JAMES J · CIK 0001234677 · EVP, Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 45,058 shares

Expires not disclosed

F1 · derivative.exercise_price: Each performance-based restricted share unit ("PSU") represents a contingent right to receive one share of Seagate Technology plc's ("Seagate") ordinary shares. The number of PSUs that may be earned is between 0% and 200% of the target number of PSUs and shall vest based on ROIC and relative TSR performance over the three-year performance period ending on September 11, 2020.

F2 · derivative.exercise_date: The PSUs vest on or after September 11, 2020 subject to the achievement and certification of the performance criteria.

F2 · derivative.expiration_date: The PSUs vest on or after September 11, 2020 subject to the achievement and certification of the performance criteria.

SEC source: 0001137789-17-000051 · wf-form4_150526699971773.xml · derivative · entry 6

MOSLEY WILLIAM D · CIK 0001388390 · Director · President & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 253,188

Underlying: Ordinary Shares · 253,188 shares

Expires 2024-09-11

F4 · derivative.exercise_date: Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four-year vesting schedule. Subject to continuous employment, one quarter of the option shares will vest on September 11, 2018. The remaining option shares will vest in equal monthly installments over the 36 months following September 11, 2018.

SEC source: 0001137789-17-000051 · wf-form4_150526699971773.xml · derivative · entry 5

MOSLEY WILLIAM D · CIK 0001388390 · Director · President & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 130,480 shares

Expires not disclosed

F2 · derivative.exercise_price: Each performance-based restricted share unit ("PSU") represents a contingent right to receive one share of Seagate Technology plc's ("Seagate") ordinary shares. The number of PSUs that may be earned is between 0% and 200% of the target number of PSUs and shall vest based on ROIC and relative TSR performance over the three-year performance period ending September 11, 2020.

F3 · derivative.exercise_date: The PSUs vest on or after September 11, 2020 subject to the achievement and certification of the performance criteria.

F3 · derivative.expiration_date: The PSUs vest on or after September 11, 2020 subject to the achievement and certification of the performance criteria.

SEC source: 0001137789-17-000050 · wf-form4_150526664872757.xml · derivative · entry 6

MORTON DAVID H JR · CIK 0001476070 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 109,290

Underlying: Ordinary Shares · 109,290 shares

Expires 2024-09-11

F5 · derivative.exercise_date: Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four-year vesting schedule. Subject to continuous employment, one quarter of the options will vest on September 11, 2018. The remaining options will vest in equal monthly installments over the 36 months following September 11, 2018.

SEC source: 0001137789-17-000050 · wf-form4_150526664872757.xml · derivative · entry 5

MORTON DAVID H JR · CIK 0001476070 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 56,323 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance-based restricted share unit ("PSU") represents a contingent right to receive one share of Seagate Technology plc's ("Seagate") ordinary shares. The number of PSUs that may be earned is between 0% and 200% of the target number of PSUs and shall vest based on ROIC and relative TSR performance over the three-year performance period ending on September 11, 2020.

F4 · derivative.exercise_date: The PSUs vest on or after September 11, 2020 subject to the achievement and certification of the performance criteria.

F4 · derivative.expiration_date: The PSUs vest on or after September 11, 2020 subject to the achievement and certification of the performance criteria.

SEC source: 0001137789-17-000048 · wf-form4_150526613880129.xml · derivative · entry 6

LUCZO STEPHEN J · CIK 0001248260 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 210,017

Underlying: Ordinary Shares · 210,017 shares

Expires not disclosed

F4 · derivative.exercise_date: Consists of a grant of restricted stock units awarded to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan (the "Plan"). The restricted stock units will be converted into ordinary shares on a one-for-one basis. Subject to the Reporting Person's continuous employment, such restricted stock units will be settled in ordinary shares in equal installments on each of the first three anniversaries of September 11, 2017.

F4 · derivative.expiration_date: Consists of a grant of restricted stock units awarded to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan (the "Plan"). The restricted stock units will be converted into ordinary shares on a one-for-one basis. Subject to the Reporting Person's continuous employment, such restricted stock units will be settled in ordinary shares in equal installments on each of the first three anniversaries of September 11, 2017.

SEC source: 0001137789-17-000051 · wf-form4_150526699971773.xml · nonDerivative · entry 4

MOSLEY WILLIAM D · CIK 0001388390 · Director · President & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 167,514

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.