Seagate Technology — Director's Dealing 2012

Feb 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2012-02-01

Reporting Person: MORTON DAVID H JR (VP, FINANCE, TREASURER &PAO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-01	Ordinary Shares	M	26250	$21.55	Acquired	61195	Direct
2012-02-01	Ordinary Shares	M	2917	$21.90	Acquired	64112	Direct
2012-02-01	Ordinary Shares	S	29167	$25.00	Disposed	34945	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-01	NQ Stock Options	$21.55	M	26250	Disposed	2013-10-23	Ordinary Shares (26250)	Direct
2012-02-01	NQ Stock Options	$21.90	M	2917	Disposed	2013-09-15	Ordinary Shares (2917)	Direct

Footnotes

F1: Shares sold under a 10b5-1 Trading Plan adopted by the Reporting Person on November 8, 2011.

F2: Options granted to the Reporting Person under the Issuer's 2004 Stock Compensation Plan are subject to a four and one-half year vesting schedule. One quarter of the option shares vested on October 16, 2007. The remaining option shares vest proportionally each month over the 36 months following October 16, 2007.

F3: Options granted to the Reporting Person under the Issuer's 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on September 15, 2007. The remaining option shares vest proportionally each month over the 36 months following September 15, 2007.