SEC FORM 4

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

O MALLEY PATRICK J

(Last)

(First)

(Middle)

SEAGATE TECHNOLOGY PLC

10200 S. DE ANZA BOULEVARD

(Street)

CUPERTINO

95014

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Seagate Technology plc [ STX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	EVP & Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/06/2012

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares	08/06/2012		M		67,999	A	$13.73	353,586.65⁽¹⁾⁽²⁾	D
Ordinary Shares	08/06/2012		S		47,650	D	$31.5337⁽³⁾	305,936.65	D
Ordinary Shares	08/07/2012		M		70,000	A	$25.48	375,936.65	D
Ordinary Shares	08/07/2012		S		70,000	D	$32.98⁽⁴⁾	305,936.65	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
NQ Stock Options	$13.73	08/06/2012		M			67,999	09/12/2009⁽⁵⁾	09/12/2015	Ordinary Shares	67,999	$0	3,954⁽⁵⁾	D
NQ Stock Options	$25.48	08/07/2012		M			70,000	04/27/2010⁽⁶⁾	04/27/2013	Ordinary Shares	132,156	$0	62,156⁽⁶⁾	D

Explanation of Responses:

1. Since the date of the reporting person's last ownership report (07/26/2012), he transferred pursuant to a domestic relations order 1,981 restricted share units to be settled in ordinary shares of Seagate Technology plc ("Issuer"), nominal value $0.00001 ("Ordinary Shares"), which transfer was exempt pursuant to Rule 16a-12. The reporting person no longer reports as beneficially owned any securities transferred pursuant to the domestic relations order.

2. Includes 563 Ordinary Shares acquired under the Employee Stock Purchase Plan on July 31, 2012.

3. The price reported in Column 4 is a weighted average price. 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.

4. Sale was effected pursuant to a Rule 10b5-1 trading plan.

5. 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 are vesting and will continue to vest proportionally each month over the 36 months following September 12, 2009. Since the date of the reporting person's last ownership report (07/26/2012), pursuant to a domestic relations order he transferred: (1) 56,047 options granted under this grant, with an exercise price per share of $13.73 and with a grant date of 09/12/2008 and (2) 218,097 options granted at an exercise price per share of $3.35 and a grant date of 03/06/2009, which transfers were exempt pursuant to Rule 16a-12. The reporting person no longer reports as beneficially owned any securities transferred pursuant to the domestic relations order.

6. Options granted to the Reporting Person under the Issuer's 2004 Stock Compensation Plan, are subject to a five year vesting schedule. One half of the option shares vested on April 27, 2010. The remaining option shares vested on April 27, 2011. Since the date of the reporting person's last ownership report (07/26/2012), pursuant to a domestic relations order he transferred 344 options granted at an exercise price per share of $25.48 and a grant date of 04/27/2006 and which transfer was exempt pursuant to Rule 16a-12. The reporting person no longer reports as beneficially owned any securities transferred pursuant to the domestic relations order.

	/S/ Roberta S. Cohen for Patrick J. O'Malley	08/08/2012
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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