| Id | Content |
|---|---|
| F1 | Restricted stock units received pursuant to dividend equivalents credited on unvested restricted stock units previously granted to the reporting person. Dividend equivalents accrue with respect to unvested restricted stock units when and as cash dividends are paid on InterDigital, Inc.'s common stock. |
| F2 | 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. |