Seagate Technology — Director's Dealing 2012

Sep 17, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology plc (STX)
CIK: 0001137789
Period of Report: 2012-09-13

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-13	Ordinary Shares	S	1725	$29.4082	Disposed	30082	Direct
2012-09-14	Ordinary Shares	S	1290	$30.2482	Disposed	28792	Direct
2012-09-14	Ordinary Shares	M	250	$13.73	Acquired	29042	Direct
2012-09-14	Ordinary Shares	M	1667	$3.345	Acquired	30709	Direct
2012-09-14	Ordinary Shares	M	573	$11.065	Acquired	31282	Direct
2012-09-14	Ordinary Shares	M	7312	$11.155	Acquired	38594	Direct
2012-09-14	Ordinary Shares	S	1867	$30.75	Disposed	36727	Direct
2012-09-14	Ordinary Shares	S	9802	$30.6555	Disposed	26925	Direct
2012-09-14	Ordinary Shares	S	1460	$29.9634	Disposed	25465	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-09-14	NQ Stock Options	$13.73	M	250	Disposed	2015-09-12	Ordinary Shares (250)	Direct
2012-09-14	NQ Stock Options	$3.345	M	1667	Disposed	2016-03-06	Ordinary Shares (1667)	Direct
2012-09-14	NQ Stock Options	$11.065	M	573	Disposed	2017-09-13	Ordinary Shares (573)	Direct
2012-09-14	NQ Stock Options	$11.155	M	7312	Disposed	2018-09-12	Ordinary Shares (7312)	Direct

Footnotes

F1: Shares sold under a 10b5-1 Trading Plan pursuant to vesting provisions under the restricted stock unit awards issued on September 12, 2008 and September 12, 2011. Shares sold to pay tax liabilities resulting from the vesting of 667 restricted stock unit shares awarded on September 12, 2008 and the vesting of 2,925 restricted stock unit shares awarded on September 12, 2011. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at sales prices ranging between $29.41 and $29.4066. The Reporting Person undertakes to provide 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.

F2: 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 to pay tax liabilities resulting from the vesting of 2,750 restricted stock unit shares awarded on September 13, 2010. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at sales prices ranging between $30.242 and $30.25. The Reporting Person undertakes to provide 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: Sale pursuant to a 10b5-1 Trading Plan

F4: Shares sold under a 10b5-1 Trading Plan. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at sales prices ranging between $30.56 and $30.76. The Reporting Person undertakes to provide 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.

F5: Options granted to 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 September 12, 2009. The remaining option shares vested in equal monthly installments over the 36 months following September 12, 2009.

F6: Options granted to the Reporting Person under the Issuer's 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 option shares vest in equal monthly installments over the 36 months following September 13, 2010.

F7: Options granted to the Reporting Person under the Issuer's 2001 Share Option Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on September 13, 2011. The remaining option shares vest in equal monthly installments over the 36 months following September 13, 2011.

F8: Options granted to 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 September 12, 2012. The remaining option shares vested in equal monthly installments over the 36 months following September 12, 2012.