Company: IDCC
Filing Date: 2025-06-18
Form Type: 11-K
Source: 0001405495-25-000034
Chunk: 0

Company: InterDigital, Inc.
Filing Date: 2025-06-18
Form: 11-K
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, DC 20549

#### FORM 11-K
| þ |     | ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

#### For the fiscal year ended December 31, 2024

#### OR
| o |     | TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

#### For the transition period from

#### to

#### Commission File Number 001-33579
<div align='center'>A. Full title of the plan and the address of the plan, if different from that of the issuer named below:</div>

### INTERDIGITAL

### SAVINGS AND PROTECTION PLAN
<div align='center'>B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:</div>

#### INTERDIGITAL, INC.
<div align='center'>200 Bellevue Parkway, Suite 300, Wilmington, DE 19809-3727

INTERDIGITAL

SAVINGS AND PROTECTION PLAN

TABLE OF CONTENTS</div>

|                                                                                                          |     | Page |
| Report of Independent Registered Public Accounting Firms                                                 |     |    1 |
| Financial Statements:                                                                                    |     |      |
| Statements of Net Assets Available for Benefits as of December 31, 2024and 2023                          |     |    3 |
| Statements of Changes in Net Assets Available for Benefits for the Years Ended December 31, 2024and 2023 |     |    4 |
| Notes to Financial Statements                                                                            |     |    5 |
| Supplementary Information:                                                                               |     |      |
| Schedule H, Line 4(i) - Schedule of Assets (Held at End of Year)                                         |     |   13 |
| Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions                                 |     |   14 |
| Exhibits                                                                                                 |     |   15 |
| Signatures                                                                                               |     |   16 |

<div align='center'>REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM</div>

The Plan Participants and The Audit Committee of InterDigital, Inc.

InterDigital Savings and Protection Plan

#### Opinion on the Financial Statements
We have audited the accompanying statement of net assets available for benefits of InterDigital Savings