Seagate Technology — Director's Dealing 2010

Sep 15, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2010-09-13

Reporting Person: MORTON DAVID H JR (VP,FINANCE,TREASURER &PAO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-13	Restricted Stock Units	A	11000	$0.00	Acquired	13549	Direct
2010-09-13	Common Shares	S	245	$10.973	Disposed	13304	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-09-13	NQ Stock Options	$11.065	A	27500	Acquired	2017-09-13	Common shares (27500)	Direct

Footnotes

F1: Consists of a grant of restricted stock units awarded to the Reporting Person under the 2004 Stock Compensation Plan for no consideration. Each restricted stock unit represents a contingent right to receive one share of Seagate common stock. Subject to the Reporting Person's Continuous Service with the Coompany, vested shares to be released to the reporting person on each of the first four anniversaries of the vesting commencement date of September 13, 2010.

F2: Shares sold pursuant to vesting provisions under the restricted stock unit award issued on September 11, 2008.Shares sold to pay tax liabilities resulting from the vesting of 667 Restricted Stock Units issued on September 12, 2008. The sale was effected pursuant to a Rule 10b5-1 trading plan.

F3: Options granted to the Reporting Person under the 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on September 13, 2011. The remaining option shares are vesting proportionally each month over the 36 months following September 13, 2011.