X0306 4 2022-03-15 0 0001405495 InterDigital, Inc. IDCC 0001885857 Hakoranta Eeva K. 200 BELLEVUE PARKWAY SUITE 300 WILMINGTON DE 19809 0 1 0 0 Chief Licensing Officer Common Stock 2022-03-15 4 A 0 579.9365 0.00 A 13277.3981 D Common Stock 2022-03-15 4 F 0 301 62.19 D 12976.3981 D Common Stock 2022-03-15 4 D 0 0.9365 62.19 D 12975.4616 D Common Stock 2022-03-15 4 F 0 1509 62.19 D 11466.4616 D Common Stock 2022-03-15 4 D 0 0.6202 62.19 D 11465.8414 D Common Stock 2022-03-15 4 A 0 10613 0.00 A 22078.8414 D 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 568 restricted stock units, vested on March 15, 2022, together with 11.9365 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, 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 4. Restricted stock units granted pursuant to the company's 2017 Equity Incentive Plan in accordance with the company's long-term compensation program. /s/ Ariel E. Greenstein, Attorney-in-Fact for Eeva K. Hakoranta 2022-03-17