X0306 4 2023-02-28 0 0001405495 InterDigital, Inc. IDCC 0001231579 BREZSKI RICHARD 200 BELLEVUE PARKWAY SUITE 300 WILMINGTON DE 19809 0 1 0 0 Chief Financial Officer Common Stock 2023-02-28 4 M 0 12518 54.93 A 101881.7646 D Common Stock 2023-02-28 4 S 0 10386 73.77 D 91495.7646 D Common Stock 1955 I By 401(k) Plan Employee Stock Options (Right-to-Buy) 54.93 2023-02-28 4 M 0 12518 0.00 D 2023-03-30 Common Stock 12518 0 D This sale represents a sell-to-cover transaction, whereby a portion of the shares acquired through the exercise of employee stock options were sold in the open market, with the proceeds used to fund the aggregate exercise price of the options and associated tax withholdings. The number of securities reported represents an aggregate number of shares sold in multiple sell-to-cover transactions over a range of sales prices ranging from $72.59 to $74.35 per share. The price reported represents the weighted average price. The Reporting Person undertakes to provide to the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares sold by the Reporting Person at each separate price within the range. As of the most recently published account statement, the reporting person beneficially owned this number of whole shares of common stock pursuant to the InterDigital Savings and Protection Plan. The stock options vested in three equal annual installments beginning on March 30, 2017. /s/ Amy A. Miraglia, Attorney-in-Fact for Richard J. Brezski 2023-03-02