X0306 4 2022-03-15 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 2022-03-15 4 A 0 11046.0272 0.00 A 85018.1419 D Common Stock 2022-03-15 4 A 0 708.5845 0.00 A 85726.7264 D Common Stock 2022-03-15 4 F 0 5259 62.19 D 80467.7264 D Common Stock 2022-03-15 4 D 0 0.6117 62.19 D 80467.1147 D Common Stock 2022-03-15 4 F 0 2319 62.19 D 78148.1147 D Common Stock 2022-03-15 4 D 0 1.1707 62.19 D 78146.944 D Common Stock 2022-03-15 4 A 0 10613 0.00 A 88759.944 D Common Stock 1912 I By 401(k) Plan The transaction reported represents the partial vesting of an award of performance-based restricted stock units granted to the reporting person on March 15, 2019 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 2019 cycle performance goal, 93% of the reporting person's target performance-based restricted stock unit award, or 10,317 restricted stock units, vested on March 15, 2022, together with 729.0272 additional shares representing accrued dividend equivalent units. 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, 25% of the reporting person's target Milestone restricted stock unit award, or 694 restricted stock units, vested on March 15, 2022, together with 14.5845 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 transactions described in Notes 1 and 2. The transaction reported reflects the cash settlement of fractional shares in connection with the vesting of restricted stock units, as described in Notes 1 and 2. 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 15, 2019 and March 31, 2021 pursuant to the company's 2017 Equity Incentive Plan in accordance with the company's long-term compensation program and vested on March 15, 2022, 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 5. Restricted stock units granted pursuant to the company's 2017 Equity Incentive Plan in accordance with the company's long-term compensation program. 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 2022-03-17