SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

RE MARK

(Last)

(First)

(Middle)

SEAGATE TECHNOLOGY PLC

10200 S. DE ANZA BOULEVARD

(Street)

CUPERTINO

95014

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
07/01/2013

3. Issuer Name and Ticker or Trading Symbol
Seagate Technology plc [ STX ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP & Chief Technical Officer

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	44,379.503⁽¹⁾⁽²⁾⁽³⁾⁽⁴⁾	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
NQ Stock Options	09/11/2010⁽⁵⁾	03/06/2016	Oridinary Shares	16,667	$3.345	D
NQ Stock Options	09/13/2011⁽⁶⁾	09/13/2017	Ordinary Shares	19,792	$11.065	D
NQ Stock Options	03/08/2012⁽⁷⁾	03/21/2018	Ordinary Shares	56,000	$13.365	D
NQ Stock Options	09/12/2012⁽⁸⁾	09/12/2018	Ordinary Shares	50,800	$11.155	D
NQ Stock Options	09/10/2013⁽⁹⁾	09/10/2019	Ordinary Shares	18,030	$29.87	D

Explanation of Responses:

1. Includes a grant of restricted stock units of which 6,000 remain outstanding awarded to the Reporting Person. The restricted stock units will be converted into ordinary shares on a one-for-one basis. Subject to the Reporting Person's continuous employment, such restricted stock units will be settled in ordinary shares in equal installments on each of the first four anniversaries of September 13, 2010.

2. Includes a grant of restricted stock units of which 4,800 remain outstanding awarded to the Reporting Person. The restricted stock units will be converted into ordinary shares on a one-for-one basis. Subject to the Reporting Person's continuous employment, such restricted stock units will be settled in ordinary shares in equal installments on each of the first four anniversaries of March 8, 2011.

3. Includes a grant of restricted stock units of which 12,750 remain outstanding awarded to the Reporting Person. The restricted stock units will be converted into ordinary shares on a one-for-one basis. Subject to the Reporting Person's continuous employment, such restricted stock units will be settled in ordinary shares in equal installments on each of the first four anniversaries of September 12, 2011.

4. Includes a grant of restricted stock units of which 11,536 remain outstanding awarded to the Reporting Person. The restricted stock units will be converted into ordinary shares on a one-for-one basis. Subject to the Reporting Person's continuous employment, such restricted stock units will be settled in ordinary shares in equal installments on each of the first four anniversaries of September 10, 2012.

5. Options granted to the Reporting Person under the Issuer's 2004 Stock Compensation Plan are subject to a four and a half year vesting schedule. One quarter of the ordinary shares vested on September 11, 2010. Following continuous employment, the remaining options vest in equal monthly installments over the 36 months following September 11, 2010

6. 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 ordinary shares vested on September 13, 2011. The remaining options vest in equal monthly installments over the 36 months following September 13, 2011.

7. 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 ordinary shares vested on March 8, 2012. The remaining options will vest in equal monthly installments over the 36 months following March 8, 2012.

8. 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 ordinary shares vested on September 12, 2012. The remaining options will vest in equal monthly installments over the 36 months following September 12, 2012.

9. Options granted to the Reporting Person under the Issuer's 2012 Incentive Equity Award Plan are subject to a four-year vesting schedule. One quarter of the ordinary shares vested on September 10, 2013. The remaining options will vest in equal monthly installments over the 36 months following September 10, 2013.

Remarks:

EXHIBIT INDEX Exhibit 24-Power of Attorney

	/s/ Roberta S. Cohen by power-of-attorney	07/03/2013
	** 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 5 (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 Number.