Company: IDCC
Filing Date: 2025-04-25
Form Type: DEFA14A
Source: 0001193125-25-097161
Chunk: 0

Company: InterDigital, Inc.
Filing Date: 2025-04-25
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 
 14a-6(e)(2))                                                       |

| ☐ | Definitive Proxy Statement |

| ☒ | Definitive Additional Materials |

| ☐ | Soliciting Material under §240.14a-12 |

INTERDIGITAL, INC. (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check the appropriate box):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 
 14a-6(i)(1) and 0-11                                                           |

Your Vote Counts! INTERDIGITAL, INC. 2025 Annual Meeting Vote by June 10, 2025 11:59 PM ET. For shares held in a Plan, vote by June 8, 2025 11:59 PM ET. INTERDIGITAL, INC. 200 BELLEVUE PARKWAY, SUITE 300 WILMINGTON, DE 19809-3727 V73586-P31063 You invested in INTERDIGITAL, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the shareholder meeting to be held on June 11, 2025. Get informed before you vote View the Notice of Meeting, Proxy Statement and 2024 Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 28, 2025. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639or (3) send an email to sendmaterial@proxyvote.com. If sending an email