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*
LUCZO STEPHEN J
(Last) (First) (Middle)
SEAGATE TECHNOLOGY PLC
10200 S. DE ANZA BOULEVARD
(Street)
CUPERTINO CA 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
X Officer (give title below) Other (specify below)
Chairman, President and CEO
3. Date of Earliest Transaction (Month/Day/Year)
08/27/2012
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)
Code V Amount (A) or (D) Price
Ordinary Shares 08/27/2012 M 100,000 A $22.695 315,880 D
Ordinary Shares 08/27/2012 M 10,000 A $26.465 325,880 D
Ordinary Shares 08/27/2012 M 3,334 A $6.525 329,214 D
Ordinary Shares 08/27/2012 M 729,166 A $4.045 1,058,380 D
Ordinary Shares 08/27/2012 M 197,656 A $11.065 1,256,036 D
Ordinary Shares 08/27/2012 S 607,231 D $33.7702(1) 648,805 D
Ordinary Shares 08/15/2012 G(2) V 25,000 D $0 2,329,692 I Stephen J Luczo Revocable Trust
Ordinary Shares 08/22/2012 G(2) V 25,000 D $0 2,304,692 I Stephen J Luczo Revocable Trust
Ordinary Shares 150,000 I Red Zone Holdings Limited Partnership
Ordinary Shares 150,000 I Red Zone II Limited Partnership
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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
NQ Options $22.695 08/27/2012 M 100,000 10/26/2007(3) 10/26/2013 Ordinary Shares 100,000 $0 0 D
NQ Options $26.465 08/27/2012 M 10,000 10/15/2008(4) 10/25/2014 Ordinary Shares 10,000 $0 0 D
NQ Options $6.525 08/27/2012 M 3,334 10/15/2009(5) 10/30/2015 Ordinary Shares 3,334 $0 417 D
NQ Options $4.045 08/27/2012 M 729,166 01/12/2010(6) 01/30/2016 Ordinary Shares 729,166 $0 364,584 D
NQ Options $11.065 08/27/2012 M 197,656 09/13/2011(7) 09/13/2017 Ordinary Shares 197,656 $0 214,844 D
Explanation of Responses:
1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at sales prices ranging from $33.75 to $33.86, inclusive. 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.
2. Reflects a gift of 25,000 ordinary shares on August 15, 2012 and a gift of 25,000 shares on August 22, 2012 to the Fidelity Investments Charitable Gift Fund.
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 October 26, 2007. The remaining option shares vested proportionally annually thereafter on October 26.
4. 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 15, 2008. The remaining option shares vest proportionally each month over the 36 months following October 15, 2008.
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 October 15, 2009. The remaining option shares vest proportionally each month over the 36 months following October 15, 2009.
6. 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 January 12, 2010. The remaining option shares vest proportionally each month over the 36 months following January 12, 2010.
7. 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.
/S/ Roberta S. Cohen for Stephen J. Luczo 08/29/2012
** 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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