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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1. Name and Address of Reporting Person * Nygaard Jeffrey D.   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) Executive Vice President (Last) (First) (Middle) 10200 S. DE ANZA BOULEVARD 3. Date of Earliest Transaction (Month/Day/Year) 09/10/2018 (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 09/11/2018   M   2,487 A $ 0 11,112 D   Ordinary Shares 09/11/2018   F   1,094 (1) D $ 48.98 10,018 D   Ordinary Shares               23,612 I Jeffrey D. Nygaard Revocable Trust U/A Dated August 17, 2009

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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 Option Grant

$ 50.29

09/10/2018

A

66,723

(2)

09/10/2025

Ordinary Shares

66,723

$ 0

66,723

D

Restricted Share Unit

(3)

09/11/2018

M

2,487

(4)

(4)

Ordinary Shares

2,487

$ 0

7,463

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Nygaard Jeffrey D. 10200 S. DE ANZA BOULEVARD CUPERTINO, CA 95014			Executive Vice President

Signatures

/s/ Jolene A. Mendelsohn Attorney-in-Fact for Jeffrey D. Nygaard		09/12/2018
**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)	These Ordinary Shares are withheld securities to cover tax liabilities incident to the vesting of Restricted Share Units ("RSUs").
(2)	Options granted to the Reporting Person under the Seagate Technology plc 2012 Equity Incentive Plan (the "Plan") are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options will vest on September 10, 2019. The remaining options vest in equal monthly installments over the 36 months following September 10, 2019.
(3)	Each RSU represents a contingent right to receive one Ordinary Share of the Issuer.
(4)	The RSUs, originally granted to the Reporting Person under the Plan for 9,950 shares, of which 2,487 have been released, vest as to one-quarter of the shares on September 11, 2018 and each one-year anniversary thereafter.

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