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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1492426	Horizon Pharma Inc.	HZNP	Pharmaceutical Preparations (2834)	272179987

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1349376	P Timothy Walbert	C/O Horizon Pharma, Inc. 520 Lake Cook Road, Suite 520 Deerfield IL 60015	President, Chairman And Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2012-12-10	33,211	$0.00	109,711	No	4	M	Direct
Common Stock	Disposition	2012-12-10	10,301	$2.28	99,410	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted stock units	Disposition	2012-12-10	33,211	$0.00	132,842	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
99,631			No	4	M	Direct

Footnotes

Reflects shares of common stock surrendered via open market sale to satisfy tax withholding obligations in connection with vesting of the restricted stock units.
Includes 6,500 shares of the Company's common stock acquired pursuant to an employee stock purchase program.
Each restricted stock units represents a contingent right to receive one share of Horizon Pharma, Inc. common stock.
The restricted stock units vest in four equal annual installments beginning December 8, 2012.