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^*

FORMELA JEAN FRANCOIS

(Last)

(First)

(Middle)

C/O HORIZON PHARMA, INC.

1033 SKOKIE BLVD., SUITE 355

(Street)

NORTHBROOK

60062

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
07/28/2011

3. Issuer Name and Ticker or Trading Symbol
HORIZON PHARMA, INC. [ HZNP ]

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

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

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)
Common Stock	326,524	I	See Footnote⁽¹⁾⁽²⁾

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)
Series A Preferred Stock	⁽³⁾	⁽³⁾	Common Stock	1,577,819⁽⁴⁾	⁽³⁾	I	See Footnotes⁽²⁾⁽⁴⁾
Series B Preferred Stock	⁽³⁾	⁽³⁾	Common Stock	179,740⁽⁵⁾	⁽³⁾	I	See Footnotes⁽²⁾⁽⁵⁾
Convertible Promissory Notes	⁽⁶⁾	⁽⁶⁾	Common Stock	3,478,905.84⁽⁶⁾	⁽⁶⁾	I	See Footnotes⁽²⁾⁽⁷⁾
Convertible Promissory Notes	⁽⁶⁾	⁽⁶⁾	Common Stock	63,703.26⁽⁶⁾	⁽⁶⁾	I	See Footnotes⁽²⁾⁽⁸⁾
Convertible Promissory Notes	⁽⁶⁾	⁽⁶⁾	Common Stock	106,385.54⁽⁶⁾	⁽⁶⁾	I	See Footnotes⁽²⁾⁽⁹⁾

Explanation of Responses:

1. Includes 9,520 shares held of record by Atlas Venture Entrepreneurs' Fund VI, L.P. ("AVE"), 5,700 shares held of record by Atlas Fund VI GmbH & Co. KG ("GmbH") and 311,304 by Atlas Venture Fund VI, L.P. ("Venture").

2. The Reporting Person is a director of Atlas Venture Associates VI, Inc., the general partner of Atlas Venture Associates VI, L.P., the general partner of AVE and Venture and the managing limited partner of GmbH. In such capacities he may be deemed to beneficially own these shares. The Reporting Person disclaims beneficial ownership of the reported shares except to the extent of his pecuniary interest therein.

3. The shares of Series A Preferred Stock and Series B Preferred Stock have no expiration date and are convertible at any time at the election of the holder. Every 2.374 shares of preferred stock will automatically convert into one share of common stock upon the closing of the Issuer's initial public offering.

4. Includes 46,003 shares held of record by AVE, 27,544 shares held of record by GmbH and 1,504,272 shares held by Venture.

5. Includes 5,240 shares held of record by AVE, 3,137 shares held of record by GmbH and 171,363 shares held by Venture.

6. Principal and accrued interest will convert upon the Issuer's initial public offering into shares of Common Stock at a conversion price equal to the lesser of (i) the public offering price of the Common Stock sold in the Issuer's initial public offering, or (ii) $18.92. Amounts shown arer eported in US dollars and include interest accrued through the date hereof; additional interest will accrue prior to conversion.

7. Held in the name of Venture.

8. Held in the name of GmbH.

9. Held in the name of AVE.

	/s/ Kristen Laguerre, Attorney-in-Fact	07/28/2011
	** 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).
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