| SECURITIES AND EXCHANGE COMMISSION | |
| Washington, D.C. 20549 | |
| SCHEDULE 13G/A | |
| Under the Securities Exchange Act of 1934 | |
| (Amendment No. 1)* | |
|
Horizon Pharma Public Limited Company | |
| (Name of Issuer) | |
|
Ordinary Shares, nominal value $0.0001 | |
| (Title of Class of Securities) | |
|
G4617B105 | |
| (CUSIP Number) | |
|
December 31, 2015 | |
| (Date of Event Which Requires Filing of This Statement) | |
| Check the appropriate box to designate the rule pursuant to which this Schedule is filed: | |
| ¨ | Rule 13d-1(b) |
| X | Rule 13d-1(c) |
| ¨ | Rule 13d-1(d) |
| (Page 1 of 7 Pages) | |
______________________________
*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).
| CUSIP No. G4617B105 | 13G/A | Page 2 of 7 Pages |
| 1 |
NAME OF REPORTING PERSON Lone Pine Capital LLC
| |||
| 2 | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP |
(a) ¨ (b) ¨ | ||
| 3 | SEC USE ONLY | |||
| 4 |
CITIZENSHIP OR PLACE OF ORGANIZATION Delaware | |||
| NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH: |
5 |
SOLE VOTING POWER 0 | ||
| 6 |
SHARED VOTING POWER 15,600,988 Ordinary Shares | |||
| 7 |
SOLE DISPOSITIVE POWER 0 | |||
| 8 |
SHARED DISPOSITIVE POWER 15,600,988 Ordinary Shares | |||
| 9 |
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 15,600,988 Ordinary Shares | |||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ¨ | ||
| 11 |
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 9.8% | |||
| 12 |
TYPE OF REPORTING PERSON OO | |||
| CUSIP No. G4617B105 | 13G/A | Page 3 of 7 Pages |
| 1 |
NAME OF REPORTING PERSON Stephen F. Mandel, Jr.
| |||
| 2 | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP |
(a) ¨ (b) ¨ | ||
| 3 | SEC USE ONLY | |||
| 4 |
CITIZENSHIP OR PLACE OF ORGANIZATION United States of America | |||
| NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH: |
5 |
SOLE VOTING POWER 0 | ||
| 6 |
SHARED VOTING POWER 15,600,988 Ordinary Shares | |||
| 7 |
SOLE DISPOSITIVE POWER 0 | |||
| 8 |
SHARED DISPOSITIVE POWER 15,600,988 Ordinary Shares | |||
| 9 |
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 15,600,988 Ordinary Shares | |||
| 10 | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES | ¨ | ||
| 11 |
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 9.8% | |||
| 12 |
TYPE OF REPORTING PERSON IN | |||
| CUSIP No. G4617B105 | 13G/A | Page 4 of 7 Pages |
| Item 1(a). | NAME OF ISSUER |
| Horizon Pharma Public Limited Company (the “Issuer”) |
| Item 1(b). | ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES |
| Connaught House, 1st Floor | |
| 1 Burlington Road | |
| D04 C5Y6 | |
| Dublin 4, Ireland |
| Item 2(a). | NAME OF PERSON FILING |
| This statement is filed by: | |
| Lone Pine Capital LLC, a Delaware limited liability company (“Lone Pine Capital”), which serves as investment manager to Lone Spruce, L.P., a Delaware limited partnership (“Lone Spruce”), Lone Tamarack, L.P., a Delaware limited partnership (“Lone Tamarack”), Lone Cascade, L.P., a Delaware limited partnership (“Lone Cascade”), Lone Sierra, L.P., a Delaware limited partnership (“Lone Sierra”), Lone Cypress, Ltd., a Cayman Islands exempted company (“Lone Cypress”), Lone Kauri, Ltd., a Cayman Islands exempted company (“Lone Kauri”), Lone Savin Master Fund, Ltd., a Cayman Islands exempted company (“Lone Savin Master Fund”) and Lone Monterey Master Fund, Ltd., a Cayman Islands exempted company (“Lone Monterey Master Fund”, and together with Lone Spruce, Lone Tamarack, Lone Cascade, Lone Sierra, Lone Cypress, Lone Kauri, Lone Savin Master Fund and Lone Monterey Master Fund, the “Lone Pine Funds”), with respect to the Ordinary Shares directly held by each of the Lone Pine Funds; and | |
| Stephen F. Mandel, Jr. (“Mr. Mandel”), the Managing Member of Lone Pine Managing Member LLC, which is the Managing Member of Lone Pine Capital, with respect to the Ordinary Shares directly held by each of the Lone Pine Funds. | |
| The foregoing persons are hereinafter sometimes collectively referred to as the “Reporting Persons”. Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party. | |
| The filing of this statement should not be construed as an admission that any of the Reporting Persons is, for the purposes of Section 13 of the Act, the beneficial owner of the Ordinary Shares reported herein. |
| Item 2(b). | ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE |
| The address of the business office of each of the Reporting Persons is Two Greenwich Plaza, Greenwich, Connecticut 06830. |
| CUSIP No. G4617B105 | 13G/A | Page 5 of 7 Pages |
| Item 2(c). | CITIZENSHIP |
| Lone Pine Capital is a limited liability company organized under the laws of the State of Delaware. Mr. Mandel is a United States citizen. |
| Item 2(d). | TITLE OF CLASS OF SECURITIES |
| Ordinary Shares, nominal value $0.0001 (the “Ordinary Shares”) |
| Item 2(e). | CUSIP NUMBER |
| G4617B105 |
| Item 3. | IF THIS STATEMENT IS FILED PURSUANT TO Rules 13d-1(b), OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A: |
| (a) | ¨ | Broker or dealer registered under Section 15 of the Act; | |
| (b) | ¨ | Bank as defined in Section 3(a)(6) of the Act; | |
| (c) | ¨ | Insurance company as defined in Section 3(a)(19) of the Act; | |
| (d) | ¨ | Investment company registered under Section 8 of the Investment Company Act of 1940; | |
| (e) | ¨ | An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); | |
| (f) | ¨ |
An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
| |
| (g) | ¨ | A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G); | |
| (h) | ¨ |
A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
| |
| (i) | ¨ |
A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;
| |
| (j) | ¨ | A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J); | |
| (k) | ¨ | Group, in accordance with Rule 13d-1(b)(1)(ii)(K). |
| If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please | |||
| specify the type of institution: | |||
| CUSIP No. G4617B105 | 13G/A | Page 6 of 7 Pages |
| Item 4. | OWNERSHIP |
| A. Lone Pine Capital LLC and Stephen F. Mandel, Jr. | |
| (a) Amount beneficially owned: 15,600,988 Ordinary Shares | |
| (b) Percent of class: 9.8%. The percentages set forth in this Item 4 and in the rest of this Schedule 13G/A are based upon a total of 159,293,170 Ordinary Shares, reported to be outstanding by the Issuer as of November 2, 2015 in its Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2015 filed with the Securities and Exchange Commission on November 6, 2015. | |
| (c)(i) Sole power to vote or direct the vote: -0- | |
| (ii) Shared power to vote or direct the vote: 15,600,988 Ordinary Shares | |
| (iii) Sole power to dispose or direct the disposition: -0- | |
| (iv) Shared power to dispose or direct the disposition: 15,600,988 Ordinary Shares |
| Item 5. | OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS |
| Not applicable. |
| Item 6. | OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON |
| See Item 2. |
| Item 7. | IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR CONTROL PERSON |
| Not applicable |
| Item 8. | IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP |
| Not applicable |
| Item 9. | NOTICE OF DISSOLUTION OF GROUP |
| Not applicable |
| Item 10. | CERTIFICATION |
| Each of the Reporting Persons hereby makes the following certification: | |
| By signing below each Reporting Person certifies that, to the best of his or its knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. |
| CUSIP No. G4617B105 | 13G/A | Page 7 of 7 Pages |
SIGNATURES
After reasonable inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.
DATE: February 16, 2016
| By: /s/ Stephen F. Mandel, Jr. | ||
| Stephen F. Mandel, Jr., individually and as | ||
| Managing Member of Lone Pine Managing Member LLC, as Managing Member of Lone Pine Capital LLC | ||