Ownership Submission
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, INC., 520 LAKE COOK ROAD, SUITE 520		 3. Date of Earliest Transaction (Month/Day/Year)
09/19/2014
(Street)

DEERFIELD, IL 60015		 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
Common Stock 09/19/2014   D(1)   164,060 D (1) 0 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   D(1)     121,701   (2) 07/15/2018 Common Stock 121,701 (3) 0 D  
Stock Option (Right to Buy) $ 5.2 09/19/2014   D(1)     128,937   (2) 02/02/2020 Common Stock 128,937 (3) 0 D  
Stock Option (Right to Buy) $ 12.94 09/19/2014   D(1)     112,787   (2) 06/15/2020 Common Stock 112,787 (3) 0 D  
Stock Option (Right to Buy) $ 4.96 09/19/2014   D(1)     216,955   (4) 12/07/2021 Common Stock 216,955 (3) 0 D  
Restricted Stock Units (5) 09/19/2014   D(1)     66,421   (6)   (5) Common Stock 66,421 (5) 0 D  
Stock Option (Right to Buy) $ 2.4 09/19/2014   D(1)     147,000   (4) 01/01/2023 Common Stock 147,000 (3) 0 D  
Restricted Stock Units (5) 09/19/2014   D(1)     96,525   (6)   (5) Common Stock 96,525 (5) 0 D  
Stock Option (Right to Buy) $ 7.61 09/19/2014   D(1)     223,000   (4) 01/01/2024 Common Stock 223,000 (3) 0 D  
Restricted Stock Units (5) 09/19/2014   D(1)     198,000   (6)   (5) Common Stock 198,000 (5) 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Walbert Timothy P
C/O HORIZON PHARMA, INC.
520 LAKE COOK ROAD, SUITE 520
DEERFIELD, IL 60015		   X     Chairman, President and CEO  

Signatures

 /s/ Robert J. De Vaere, 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) Disposition in connection with the merger (the "Merger") contemplated by the Transaction Agreement and Plan of Merger among Horizon Pharma, Inc. (the "Issuer"), Vidara Therapeutics Holdings LLC, Horizon Pharma plc (formerly known as Vidara Therapeutics International Ltd.), Hamilton Holdings (USA), Inc. and Hamilton Merger Sub, Inc. Pursuant to the Merger, the outstanding securities of the Issuer are being canceled and automatically converted into securities of Horizon Pharma plc. The Reporting Person's acquisition of securities of Horizon Pharma plc 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 has been assumed and converted into options to purchase the same number of ordinary shares of Horizon Pharma plc 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 Horizon Pharma plc.
(6) The restricted stock units vest in four equal annual installments.

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