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^*

BIONDI FRANK

(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)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/02/2012

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	08/02/2012		A		62,442	A	$19.535	81,910	D
Ordinary Shares	08/02/2012		S		62,442	A	$30	19,468	D
Ordinary Shares	08/03/2012		A		37,558	A	$19.535	57,026	D
Ordinary Share	08/03/2012		A		9,374	A	$6.525	66,400	D
Ordinary Shares	08/03/2012		A		626	A	$14.825	67,026	D
Ordinary Shares	08/03/2012		S		47,558	D	$30.11	19,468	D
Ordinary Shares								21,948	I	Biondi Family Trust

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	$19.535	08/02/2012		M			62,442	12/20/2006⁽¹⁾	12/20/2012	Ordinary Shares	62,442	$0	37,558	D
NQ Stock Options	$19.535	08/03/2012		M			37,558	12/20/2006⁽¹⁾	12/20/2012	Ordinary Shares	37,558	$0	0	D
NQ Stock Options	$6.525	08/03/2012		M			9,374	10/15/2009⁽²⁾	10/30/2015	Ordinary Shares	9,374	$0	626	D
NQ Stock Options	$14.825	08/03/2012		M			626	10/15/2010⁽³⁾	10/28/2016	Ordinary Shares	626	$0	9,374	D

Explanation of Responses:

1. Options granted to the Reporting Person under the Seagate Technology's 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on December 20, 2006. The remaining three quarters vested annually on December 20 over the three years thereafter.

2. Options granted to the Reporting Person under the Seagate Technology's 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on October 15, 2009. The remaining three quarters vested monthly over the 36 months following October 15, 2009.

3. Options granted to the Reporting Person under the Seagate Technology's 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on October 15, 2010. The remaining three quarters vested monthly over the 36 months following October 15, 2010.

	/S/ Roberta S. Cohen for Frank J. Biondi Jr.	08/06/2012
	** 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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