UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ☑ ACT OF 1934 For the quarterly period ended September 30, 2023 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ☐ ACT OF 1934 For the transition period from to Commission File Number 1-33579 INTERDIGITAL, INC. (Exact Name of Registrant as Specified in Its Charter) Pennsylvania 82-4936666 (State or Other Jurisdiction of (I. ...