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 * Walbert Timothy P   2. Issuer Name and Ticker or Trading Symbol Horizon Pharma plc [HZNP] 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 (Last) (First) (Middle) C/O HORIZON PHARMA PLC, ADELAIDE CHAMBERS, PETER STREET 3. Date of Earliest Transaction (Month/Day/Year) 09/19/2014 (Street) DUBLIN, L2 8 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 09/19/2014   A(1)   164,060 A (1) 164,060 D

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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
Stock Option (Right to Buy)	$ 10.43	09/19/2014		A(1)		121,701		(2)	07/15/2018	Ordinary Shares	121,701	(3)	121,701	D
Stock Option (Right to Buy)	$ 5.2	09/19/2014		A(1)		128,937		(2)	02/02/2020	Ordinary Shares	128,937	(3)	128,937	D
Stock Option (Right to Buy)	$ 12.94	09/19/2014		A(1)		112,787		(2)	06/15/2020	Ordinary Shares	112,787	(3)	112,787	D
Stock Option (Right to Buy)	$ 4.96	09/19/2014		A(1)		216,955		(4)	12/07/2021	Ordinary Shares	216,955	(3)	216,955	D
Restricted Stock Units	(5)	09/19/2014		A(1)		66,421		(6)	(5)	Ordinary Shares	66,421	(5)	66,421	D
Stock Option (Right to Buy)	$ 2.4	09/19/2014		A(1)		147,000		(4)	01/01/2023	Ordinary Shares	147,000	(3)	147,000	D
Restricted Stock Units	(5)	09/19/2014		A(1)		96,525		(6)	(5)	Ordinary Shares	96,525	(5)	96,525	D
Stock Option (Right to Buy)	$ 7.61	09/19/2014		A(1)		223,000		(4)	01/01/2024	Ordinary Shares	223,000	(3)	223,000	D
Restricted Stock Units	(5)	09/19/2014		A(1)		198,000		(6)	(5)	Ordinary Shares	198,000	(5)	198,000	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Walbert Timothy P C/O HORIZON PHARMA PLC ADELAIDE CHAMBERS, PETER STREET DUBLIN, L2 8	X		Chairman, President and CEO

Signatures

/s/ Paul W. Hoelscher, Attorney-in-Fact		09/22/2014
**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)	Acquisition in connection with the merger (the "Merger") contemplated by the Transaction Agreement and Plan of Merger among Horizon Pharma, Inc., Vidara Therapeutics Holdings LLC, the Issuer (formerly known as Vidara Therapeutics International Ltd.), Hamilton Holdings (USA), Inc. and Hamilton Merger Sub, Inc. Pursuant to the Merger, the outstanding securities of Horizon Pharma, Inc. are being canceled and automatically converted into securities of the Issuer. The Reporting Person's disposition of securities of Horizon Pharma, Inc. in the Merger will be reported on a separate Form 4.
(2)	The stock option is fully vested and exercisable. 25% of the shares subject to the option vested on the first anniversary of the grant date, and the remaining shares vested in 36 equal monthly installments thereafter.
(3)	In connection with the Merger, the stock option originally granted by Horizon Pharma, Inc. has been converted into an option to purchase the same number of ordinary shares of the Issuer at the same exercise price and on substantially the same terms.
(4)	The stock option vests in 48 equal monthly installments following the date of grant.
(5)	Each restricted stock unit represented a contingent right to receive one share of Horizon Pharma, Inc. common stock. Each restricted stock unit has been converted into a contingent right to receive one ordinary share of the Issuer.
(6)	The restricted stock units vest in four equal annual installments.

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