Seagate Technology — Director's Dealing 2012

Mar 1, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2012-02-28

Reporting Person: O MALLEY PATRICK J (EVP & Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-28	Ordinary Shares	M	75000	$15.065	Acquired	460706.66	Direct
2012-02-28	Ordinary Shares	S	75000	$26.84	Disposed	385706.66	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-28	NQ Stock Options	$15.065	M	75000	Disposed	2012-09-27	Ordinary Shares (75000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary shares	281800	Indirect

Footnotes

F1: Includes 767 shares purchased under the Employee Stock Purchase Plan on January 31, 2012 at $11.764 per share.

F2: 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 27, 2006. The remaining option shares vested proportionally each month over the 36 months following September 27, 2006.