X0306 4 2023-03-15 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 2023-03-15 4 A 0 24896.4708 0.00 A 116392.2354 D Common Stock 2023-03-15 4 F 0 11646 73.43 D 104746.2354 D Common Stock 2023-03-15 4 D 0 0.4708 73.43 D 104745.7646 D Common Stock 2023-03-15 4 F 0 5977 73.43 D 98768.7646 D Common Stock 2023-03-15 4 D 0 1.0478 73.43 D 98767.7168 D Common Stock 1955 I By 401(k) Plan The transaction reported represents the vesting of awards of performance-based restricted stock units granted to the reporting person on March 31, 2020 pursuant to the company's 2017 Equity Incentive Plan in accordance with the company's long-term compensation program. Based on the achievement level of the 2020 cycle performance goal, 116% of the reporting person's target performance-based restricted stock unit awards, or 23,393 restricted stock units, vested on March 15, 2023, together with 1,503.4708 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. The transaction reported reflects the withholding of restricted stock units in satisfaction of the reporting person's tax liability. The restricted stock units were granted to the reporting person on March 31, 2020, March 31, 2021 and March 15, 2022 pursuant to the company's 2017 Equity Incentive Plan in accordance with the company's long-term compensation program and vested on March 15, 2023, together with accrued dividend equivalents. The transaction reported reflects the cash settlement of fractional shares in connection with the vesting of restricted stock units, as described in Note 4. 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 2023-03-17