Sec Form 4 Filing - MASSARONI KENNETH M @ Seagate Technology plc - 2012-07-16

Insider filing report for Changes in Beneficial Ownership
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FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person
MASSARONI KENNETH M
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,General Counsel, CAO
(Last) (First) (Middle)
SEAGATE TECHNOLOGY PLC, 10200 S. DE ANZA BOULEVARD
3. Date of Earliest Transaction (MM/DD/YY)
07/16/2012
(Street)
CUPERTINO, CA95014
4. If Amendment, Date Original Filed (MM/DD/YY)
6. Individual or Joint/Group Filing (Check Applicable Line)
__ X __ Form filed by One Reporting Person
_____ Form filed by More than One Reporting Person
(City) (State) (Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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)
Code V Amount (A) or (D) Price
Ordinary Shares 07/16/2012 M 10,000 A $ 3.345 30,429 D
Ordinary Shares 07/16/2012 M 10,000 A $ 13.73 40,429 D
Ordinary Shares 07/16/2012 S 5,000 D $ 25.5794 ( 1 ) 35,429 D
Ordinary Shares 07/16/2012 S 5,000 D $ 25.5614 ( 2 ) 30,429 D
Ordinary Shares 07/16/2012 S 10,000 D $ 25.6454 ( 2 ) 20,429 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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
(MM/DD/YY)
7. Title and Amount of Underlying Securities
(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 of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
NQ Stock Options $ 3.345 07/16/2012 M 10,000 09/11/2010( 3 ) 03/06/2016 Ordinary Shares 10,000 $ 0 145,000 D
NQ Stock Optioins $ 13.73 07/16/2012 M 10,000 09/12/2009( 4 ) 09/12/2015 Ordinary Shares 10,000 $ 0 47,500 D
Reporting Owners
Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
MASSARONI KENNETH M
SEAGATE TECHNOLOGY PLC
10200 S. DE ANZA BOULEVARD
CUPERTINO, CA95014
EVP,General Counsel, CAO
Signatures
/S/ Roberta S. Cohen for Kenneth M. Massaroni 07/18/2012
Signature of Reporting Person Date
Explanation of Responses:
( 1 )Shares were sold under a 10b5-1 Trading Plan adopted by the Reporting Person on November 17, 2011.
( 2 )Shares were sold under a 10b5-1 Trading Plan adopted by the Reporting Person on May 10, 2012.
( 3 )Options granted to the Reporting Person under the Seagate Technology's 2004 Stock Compensation Plan are subject to a four and half year vesting schedule. One quarter of the option shares vested on September 11, 2010 . Following continuous employment, the remaining shares vest proportionally monthly over the 36 months following September 11, 2010.
( 4 )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 September 12, 2009 . Following continuous employment, the remaining shares vest proportionally monthly over the 36 months following September 12, 2009.

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).
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