Company: SUPN
Filing Date: 2025-04-30
Form Type: DEF 14A
Source: 0001104659-25-042531
Chunk: 4

Company: SUPERNUS PHARMACEUTICALS, INC.
Filing Date: 2025-04-30
Form: DEF 14A
Chunk 4
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 as “Legal Proxy” and be received no later than 5:00 P.M. Eastern Daylight Time, on June 13, 2025. You will receive a confirmation of your registration by email after we receive your registration materials. Requests for registration should be directed by email to legalproxy@computershare.com with the email from your bank, broker or nominee, or attach an image of your legal proxy, or you can send your legal proxy by mail to Computershare, Supernus Pharmaceuticals, Inc. Legal Proxy, P.O. Box 43001, Providence, Rhode Island 02940-3001.

| ​ | ​ | VOLUNTARY ELECTRONIC RECEIPT OF PROXY MATERIALS                                                                                                                                                                                               
 Supernus is pleased to deliver proxy materials electronically via the internet. Electronic delivery allows Supernus to provide you with the information you need for the Annual Meeting in a fast and convenient medium while reducing costs. 
 We encourage our shareholders to elect to receive all proxy materials (including the notice of availability of such materials) electronically.                                                                                                |   |   |   |                                  | ​ | ​ |
| ​ | ​ | Shareholders of Record                                                                                                                                                                                                                        
 Enroll at: www.investorvote.com/SUPN                                                                                                                                                                                                          | ​ | ​ | ​ | Beneficial Owners                
 Enroll by contacting your broker | ​ | ​ |

QUORUM AND REQUIRED VOTE The holders of a majority of the outstanding shares entitled to vote at the Annual Meeting, present virtually or represented by proxy, shall constitute a quorum. If a broker that is a record holder of Common Stock does not return a signed Proxy, the shares of Common Stock represented by such Proxy will not be considered present at the Annual Meeting and will not be counted toward establishing a quorum. If a broker that is a record holder of Common Stock does return a signed Proxy, but is not authorized to vote on one or more matters, each such vote being a broker non-vote, the shares of Common Stock represented by such Proxy will be considered present at the Annual Meeting for purposes of determining the presence of a quorum. Although the Proxy (see our Proxy Card) references the potential for a shareholder proposal to be considered at the Annual Meeting, in accordance with a no-action letter received from the SEC staff on April 30, 2025, that proposal is not included in this Proxy Statement and will not be considered or voted on at the Annual Meeting. A plurality of the votes cast is required for the election of directors. In the event that