Seagate Technology — Director's Dealing 2012

Aug 31, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2012-08-29

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-08-23	Ordinary Shares	G	30000	—	Disposed	275936.65	Direct
2012-08-29	Ordinary Shares	M	290446	$3.345	Acquired	566382.65	Direct
2012-08-29	Ordinary Shares	S	151054	$33.7340	Disposed	415328.65	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-08-29	NQ Stock Options	$3.345	M	290446	Disposed	2016-03-06	Ordinary Shares (290446)	Direct

Footnotes

F1: This transaction is a "sell to cover" transaction in which the Reporting Person used the proceeds from the sale of shares in part to fund the exercise of an option.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at sales prices ranging from $33.71 to $33.79, 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 Issuer's 2004 Stock Compensation Plan are subject to a four and one half year vesting schedule. One quarter of the option shares vested on September 11, 2010. The remaining option shares vest proportionally each month over the 36 months following September 11, 2010.