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): February 17, 2015

Supernus Pharmaceuticals, Inc.

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of
Incorporation)

Registrant’s telephone number, including area code:  (301) 838-2500

Not Applicable

(Former name or former address, if changed since last report.)

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 (see General Instruction A.2. below):

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

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

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

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

Item 2.02                                           Other Events

On February 17, 2015, Supernus Pharmaceuticals, Inc. (the “Company”)  issued a press release announcing that it expects to report financial results for the fourth quarter and full year ending December 31, 2014 after 5:00 PM ET on March 10, 2015, and will hold a conference call and webcast on March 11, 2015 to review the fourth quarter and full year 2014 financial results.  A copy of this press release is furnished as Exhibit 99.1 hereto and is incorporated herein by reference.

Item 8.01                                           Other Events

On February 18, 2015, Supernus Pharmaceuticals, Inc. issued a press release announcing that the Company’s management will present an overview of the Company and host investor meetings at an investor conference in Boston, Massachusetts on March 4, 2015.  A copy of this press release is furnished as Exhibit 99.2 hereto and is incorporated herein by reference.

Item 9.01                                           Financial Statements and Exhibits.

(d)                                 Exhibits

The following document is furnished as an Exhibit pursuant to Item 2.02 hereof:

Exhibit 99.1 — Press Release Dated February 17, 2015.

The following document is furnished as an Exhibit pursuant to Item 8.01 hereof:

Exhibit 99.2 — Press Release Dated February 18, 2015.

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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.

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EXHIBIT INDEX

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