X0508 4 2023-12-15 0 0001405495 InterDigital, Inc. IDCC 0001231579 BREZSKI RICHARD 200 BELLEVUE PARKWAY SUITE 300 WILMINGTON DE 19809 0 1 0 0 Chief Financial Officer 0 Common Stock 2023-12-15 4 A 0 736.2424 0.00 A 110092.8412 D Common Stock 2023-12-15 4 F 0 336 109.30 D 109756.8412 D Common Stock 2023-12-15 4 D 0 0.2424 109.30 D 109756.5988 D Common Stock 1963 I By 401k Plan The transaction reported represents the partial vesting of an award of performance-based restricted stock units granted to the reporting person on March 31, 2021 pursuant to the company's 2017 Equity Incentive Plan in accordance with the company's long-term compensation program. Based on the achievement of one Milestone goal, 10% of the reporting person's target Milestone restricted stock unit award, or 694 restricted stock units, vested on December 15, 2023, together with 42.2424 additional shares representing accrued dividend equivalent units. The transaction reported reflects the withholding of restricted stock units in satisfaction of the reporting person's tax liability in connection with the transaction described in Note 1. The transaction reported reflects the cash settlement of fractional shares in connection with the vesting of restricted stock units, as described in Note 1. 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. /s/ Amy A. Miraglia, Attorney-in-Fact for Richard J. Brezski 2023-12-19