Seagate Technology — Director's Dealing 2012

Sep 18, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2012-09-14

Reporting Person: MASSARONI KENNETH M (EVP,General Counsel, CAO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-14	Ordinary Shares	S	1105	$30.0018	Disposed	36554	Direct
2012-09-17	Ordinary Shares	M	10000	$3.345	Acquired	46554	Direct
2012-09-17	Ordinary Shares	M	10000	$13.73	Acquired	56554	Direct
2012-09-17	Ordinary Shares	S	20000	$30.144	Disposed	36554	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-09-17	NQ Options	$3.345	M	10000	Disposed	2016-03-06	Ordinary Shares (10000)	Direct
2012-09-17	NQ Options	$13.73	M	10000	Disposed	2015-09-12	Ordinary Shares (10000)	Direct

Footnotes

F1: Shares sold under a 10b5-1 Trading Plan pursuant to vesting provisions under the restricted stock unit awards issued on September 13, 2010. Shares sold in part to pay tax liabilities resulting from the vesting of 2,550 restricted stock unit shares awarded on September 13, 2010.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at sales prices ranging from $30.03 to $30.30, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3: Options granted to the Reporting Person under the Seagate Technology 2004 Stock Compensation Plan are subject to a four and a half year vesting schedule. One quarter of the option shares vested on September 11, 2010. Following continuous employment, the remaining shares vest proportionally monthly over the 36 months following September 11, 2010.

F4: Options granted to the Reporting Person under the Seagate Technology 2004 Stock Compensation Plan are subject to a four year vesting schedule. One quarter of the option shares vested on September 12, 2009. Following continuous employment, the remaining shares vest proportionally monthly over the 36 months following September 12, 2009.