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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): October 21, 2026

 

Supernus Pharmaceuticals, Inc.

 (Exact name of registrant as specified in its charter)

 

Delaware 001-35518 20-2590184
(State or other jurisdiction of
incorporation or organization)
(Commission File Number) (I.R.S. Employer Identification No.)

 

9715 Key West Ave Rockville MD 20850
(Address of Principal Executive Offices)     (Zip Code)

 

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

 

Not Applicable

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

 

Securities registered pursuant to Section 12(b) of the Exchange Act

 

Title of each class Trading Symbol Name of each exchange on which registered
Common Stock, $0.001 par value per share SUPN The Nasdaq Stock Market LLC

 

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):

 

¨ 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 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). ¨

 

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 8.01Other Events.

 

On October 21, 2026, Supernus Pharmaceuticals, Inc. (the “Company”) issued a press release announcing that the U.S. Food and Drug Administration (“FDA”) has recognized seven years of orphan-drug exclusive approval for ONAPGO (apomorphine HCl) for the treatment of motor fluctuations in adults with advanced Parkinson’s disease. The seven-year market exclusivity for ONAPGO began on February 3, 2025, the date of FDA approval. The Company also announced it submitted a supplemental New Drug Application to the FDA for a second supplier for ONAPGO and continues to expect potential FDA approval of the second supplier by mid-year 2027.

 

Item 9.01 Financial Statements and Exhibits.

 

  (d) Exhibits

 

Exhibit 99.1 – Press Release dated October 21, 2026

Exhibit 104 – The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

 

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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. 

 

  SUPERNUS PHARMACEUTICALS, INC.
   
DATED: October 21, 2026 By: /s/ Timothy C. Dec
    Timothy C. Dec
    Senior Vice President and Chief Financial Officer

 

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ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

EXHIBIT 99.1

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