XNAS:STX Seagate Technology PLC Insider Activity 4 Filing - 5/1/2012

Effective Date 5/1/2012

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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 OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
MORTON DAVID H JR
  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)
VP, FINANCE, TREASURER &PAO
(Last)
(First)
(Middle)
SEAGATE TECHNOLOGY PLC, 10200 S. DE ANZA BOULEVARD
3. Date of Earliest Transaction (Month/Day/Year)
05/01/2012
(Street)

CUPERTINO, CA 95014
4. If Amendment, Date 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
(City)
(State)
(Zip)
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)
Code V Amount (A) or (D) Price
Ordinary Shares 05/01/2012   M   1,146 A $11.065 36,361 D  
Ordinary Shares 05/01/2012   M   500 A $13.73 36,861 D  
Ordinary Shares 05/01/2012   M   3,333 A $3.345 40,194 D  
Ordinary Shares 05/01/2012   S   5,789 D $32.25 34,405 D  
Ordinary Shares 05/01/2012   S   8,268 D $32.3 26,137 D  
Ordinary Shares 05/01/2012   S   3,620 D $32.31 22,517 D  
Ordinary Shares 05/01/2012   S   700 D $32.32 21,817 D  
Ordinary Shares 05/01/2012   S   1,200 D $32.33 20,617 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

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 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 $11.065 05/01/2012   M     1,146 09/13/2011(1) 09/13/2017 Ordinary Shares 1,146 $ 0 16,615 D  
NQ Stock Options $13.73 05/01/2012   M     500 09/12/2009(2) 09/12/2015 Ordinary Shares 500 $ 0 1,250 D  
NQ Stock Options $3.345 05/01/2012   M     3,333 09/11/2010(3) 03/06/2016 Ordinary Shares 3,333 $ 0 28,334 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MORTON DAVID H JR
SEAGATE TECHNOLOGY PLC
10200 S. DE ANZA BOULEVARD
CUPERTINO, CA 95014
      VP, FINANCE, TREASURER &PAO  

Signatures

 /S/ Roberta S Cohen for David H. Morton Jr.   05/03/2012
** Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) 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 proportionally each month over the 36 months following September 13, 2011.
(2) 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 vest proportionally each month over the 36 months following September 12, 2009.
(3) Options granted to the Reporting Person under the Issuer's 2004 Stock Compensation Plan are subject to a four and one half year vesting schedule. One quarter of the option shares vested on September 11, 2010. The remaining option shares vest proportionally each month over the 36 months following September 11, 2010.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

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XNAS:STX Seagate Technology PLC Insider Activity 4 Filling

Seagate Technology PLC XNAS:STX Stock - Get Insider Activity SEC Filing of Seagate Technology PLC XNAS:STX stocks, including company profile, shares outstanding, strategy, business segments, operations, officers, consolidated financial statements, financial notes and ownership information.

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XNAS:STX Seagate Technology PLC Insider Activity 4 Filing - 5/1/2012
Name |  Ticker |  Star Rating |  Market Cap |  Stock Type |  Sector |  Industry Star Rating |  Investment Style |  Total Assets |  Category |  Top Holdings |  Top Sectors |  Symbol |  Title Star Rating |  Category |  Total Assets |  Top Holdings |  Top Sectors |  Symbol |  Name Title |  Date |  Author |  Collection |  Interest |  Popularity Topic |  Sector |  Key Indicators |  User Interest |  Market Cap |  Industry Name |  Ticker |  Star Rating |  Market Cap |  Stock Type |  Sector |  Industry Star Rating |  Investment Style |  Total Assets |  Category |  Top Holdings |  Top Sectors |  Symbol / Ticker |  Title Star Rating |  Category |  Total Assets |  Symbol / Ticker |  Name Title |  Date |  Author |  Collection |  Popularity |  Interest Title |  Date |  Company |  Symbol |  Interest |  Popularity Title |  Date |  Company |  Symbol |  Interest |  Popularity

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