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
                                                                                  
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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(f) of the Investment Company Act of 1940
                      

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, 920 DISC DRIVE 		3. Date of Earliest Transaction (MM/DD/YYYY)

4/25/2011
(Street)

SCOTTS VALLEY, CA 950600
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   4/25/2011     M    1376   A $13.62   13978   D    
Ordinary Shares   4/25/2011     M    1501   A $15.74   15479   D    
Ordinary Shares   4/25/2011     M    2501   A $15.065   17980   D    
Ordinary Shares   4/25/2011     M    16666   A $3.345   34646   D    
Ordinary Shares   4/25/2011     S    22044   D $18.00   12602   D    
Ordinary Shares   4/25/2011     M    7750   A $13.73   20352   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 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   $13.62   4/25/2011     M         1376    9/16/2005   (1) 9/16/2011   Ordinary Shares   1376   $0.00   0   D    
NQ Stock Options   $15.74   4/25/2011     M         1501    10/3/2006   (2) 10/3/2012   Ordinary Shares   1501   $0.00   0   D    
NQ Stock Options   $15.065   4/25/2011     M         2501    9/27/2006   (3) 9/27/2012   Ordinary Shares   2501   $0.00   0   D    
NQ Stock Options   $3.345   4/25/2011     M         16666    9/11/2011   (4) 3/6/2016   Ordinary Shares   16666   $0.00   48334   D    
NQ Stock Options   $13.73   4/25/2011     M         7750    9/12/2009   (5) 9/12/2013   Ordinary Shares   7750   $0.00   4250   D    

Explanation of Responses:
( 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 16, 2005. The remaining option shares vested proportionally each month over the 36 months following September 16, 2005.
( 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 October 3, 2006. The remaining option shares vested proportionally each month over the 36 months following October 3, 2006.
( 3)  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 27, 2006. The remaining option shares vested proportionally each month over the 36 months following September 26, 2006.
( 4)  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 vested proportionally each month over the 36 months following September 11, 2010.
( 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 vested proportionally each month over the 36 months following September 12, 2009.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
MORTON DAVID H JR
SEAGATE TECHNOLOGY
920 DISC DRIVE
SCOTTS VALLEY, CA 950600

VP,FINANCE,TREASURER &PAO

Signatures
/S/ Roberta S Cohen for David H. Morton Jr. 4/27/2011
** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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.
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