Seagate Technology — Director's Dealing 2013

Feb 4, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2013-02-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-01	Ordinary Shares	M	50000	$24.63	Acquired	78360	Direct
2013-02-01	Ordinary Shares	S	50000	$33.776	Disposed	28360	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-01	NQ Stock Options	$24.63	M	50000	Disposed	2014-09-13	Ordinary Shares (50000)	Direct

Footnotes

F1: On January 31, 2013, the Reporting Person purchased 206 Ordinary Shares under the Issuer's Employee Stock Purchase Plan. Such acquisition is exempt from reporting pursuant to Rule 16b-3 under the Securities Exchange Act of 1934.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at sales prices ranging from $33.75 to $33.84, 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 year vesting schedule. One quarter of the option shares vested on September 13, 2008. Following continuous employment, the remaining shares vested proportionally monthly over the 36 months following September 13, 2008.