Seagate Technology — Director's Dealing 2012

Apr 18, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2012-04-16

Reporting Person: MOSLEY WILLIAM D (EVP, Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-04-16	Ordinary Shares	M	35447	$26.35	Acquired	50421.5977	Direct
2012-04-16	Ordinary Shares	S	35447	$29.00	Disposed	14974.5977	Direct
2012-04-18	Ordinary Shares	M	14553	$26.35	Acquired	29527.5977	Direct
2012-04-18	Ordinary Shares	S	14553	$29.00	Disposed	14974.5977	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-04-16	NQ Stock Options	$26.35	M	35447	Disposed	2014-02-05	Ordinary (35447)	Direct
2012-04-16	NQ Stock Options	$26.35	M	14553	Disposed	2014-02-05	Ordinary (14553)	Direct

Footnotes

F1: Shares were sold under a 10b5-1 trading plan adopted by the Reporting Person on February 22, 2011.

F2: Options granted 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 February 5, 2008. The remaining shares vested proportionally monthly over the 36 months following February 5, 2008.