Seagate Technology — Director's Dealing 2011

Aug 15, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2011-08-15

Reporting Person: O MALLEY PATRICK J (EVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-08-15	Ordinary Shares	M	650000	$5.00	Acquired	682673.66	Direct
2011-08-15	Ordinary Shares	S	434414	$11.9685	Disposed	248259.66	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-08-15	Nonqualified Stock Options	$5.00	M	650000	Disposed	2012-01-31	Ordinary Shares (650000)	Direct

Footnotes

F1: On July 8, 2010, the Compensation Committee of the Board of Directors of the Issuer authorized and confirmed that the performance metrics were met with respect to 6,000 of the 24,000 Performance Shares (the "2008 Shares") granted to Mr. O'Malley on September 12, 2008 and reported on Mr. O'Malley's Form 4 dated September 16, 2008. Further the Compensation Committee authorized and confirmed that the performance metrics were met with respect to 4,000 of the 16,000 Performance Shares (the "2010 Shares") granted to Mr. O'Malley on September 13, 2010 and reported on Mr. O'Malley's Form 4 dated September 15, 2010.

F2: Options granted to the Reporting Person under the Issuer's 2001 Share Option Plan are subject to a five-year vesting schedule. One fifth of the option shares vested January 31, 2006. The remaining option shares vested on January 31, 2007.