Seagate Technology — Director's Dealing 2011

Feb 15, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2011-02-11

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-11	Ordinary Shares	M	15000	$3.345	Acquired	27602	Direct
2011-02-11	Ordinary Shares	S	6596	$14.3	Disposed	21006	Direct
2011-02-11	Ordinary Shares	S	6739	$14.31	Disposed	14267	Direct
2011-02-11	Ordinary Shares	S	1665	$1432	Disposed	12602	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-11	NQ Stock Options	$3.345	M	15000	Disposed	2016-03-06	Ordinary Shares (15000)	Direct

Footnotes

F1: Includes 269 shares purchased under the Employee Stock Purchase Plan on January 31, 2011 at $10.9905 per share.

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 September 11, 2010. The remaining option shares vest proportionally each month over the 36 months following September 11, 2010.