Seagate Technology — Director's Dealing 2014

May 8, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2014-05-06

Reporting Person: MARSHALL LYDIA MICHEAUX (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-06	Ordinary Shares	M	626	$6.525	Acquired	27304	Direct
2014-05-06	Ordinary Shares	M	10000	$14.825	Acquired	37304	Direct
2014-05-06	Ordinary Shares	S	10626	$50.3362	Disposed	26678	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-05-06	NQ Stock Options	$6.525	M	626	Disposed	2015-10-30	Ordinary Shares (626)	Direct
2014-05-06	NQ Stock Options	$14.825	M	10000	Disposed	2016-10-28	Ordinary Shares (10000)	Direct

Footnotes

F1: These Ordinary Shares were sold in multiple transactions at sales prices ranging from $50.33 to $50.35, 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 ranges set forth in the footnote of this Form 4.

F2: Options granted to the Reporting Person under Seagate Technology's 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on October 15, 2009. The remaining shares vested proportionally monthly over the 36 months following October 15, 2009.

F3: Options granted to the Reporting Person under Seagate Technology's 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on October 15, 2010. The remaining shares vested proportionally monthly over the 36 months following October 15, 2010.