UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 15, 2017

Horizon Pharma Public Limited Company

(Exact name of registrant as specified in its charter)

Ireland	001-35238	Not Applicable
(State or other jurisdiction of incorporation)	(Commission File No.)	(IRS Employer Identification No.)

Connaught House, 1^st Floor, 1 Burlington Road,

Dublin 4, D04 C5Y6, Ireland

(Address of principal executive offices)

Registrant’s telephone number, including area code: 011-353-1-772-2100

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 8.01. Other Events.

On May 15, 2017, Horizon Pharma plc issued a press release announcing the ruling of the United States District Court for the District of New Jersey in Horizon Pharma Ireland Limited, et al v. Actavis Laboratories UT, Inc., C.A. No. 14-cv-7992-NLH-AMD, following a bench trial. The District Court upheld the validity of Horizon Pharma’s patent covering PENNSAID® (diclofenac sodium topical solution) 2% w/w, which Actavis Laboratories UT, Inc. (Actavis) has admitted that its proposed generic diclofenac sodium topical solution product would infringe. A copy of the press release is attached at Exhibit 99.1 and is incorporated by reference herein.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.	Description
99.1	Press release of Horizon Pharma plc, dated May 15, 2017.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: May 15, 2017	HORIZON PHARMA PUBLIC LIMITED COMPANY
	By:	/s/ Paul W. Hoelscher
		Paul W. Hoelscher
		Executive Vice President and Chief Financial Officer

INDEX TO EXHIBITS

Exhibit No.	Description
99.1	Press release of Horizon Pharma plc, dated May 15, 2017.