InterDigital is a mobile technology research and development company that provides wireless technologies for mobile devices, networks, and services worldwide. Founded in 1972, InterDigital is listed on NASDAQ and is included in the S&P MidCap 400 index.

InterDigital has a portfolio of about 20,000 U.S. and foreign issued patents and patent applications. In 2012 Business Insider put them on their list of the 8 most fearsome patent trolls. This allegation was rebutted by CEO, Bill Merritt, in an interview the same year with Engadget: "Traditionally, people see trolls as companies that don't do their own development, or don't have products....we have hundreds of engineers, we participate in and often chair standards committees, and we partner with leading operators, infrastructure companies and solution providers to develop and test new solutions."

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The company is primarily focused on advanced wireless (5G) and Internet of Things (IoT) research:

According to research by Wiseharbor Research, a technology IP research firm, InterDigital Technology Corp. and InterDigital Patent Holdings held 282 declared essential LTE patents and 155 declared essential LTE patents respectively. The report also shows other mobile SEP owner-licensors such as Ericsson (146 declared essential LTE patents), Qualcomm (350 declared essential LTE patents), Nokia (142 declared essential LTE patents) and Huawei (182 declared essential LTE patents).

In June 2014 Samsung and Interdigital entered into a patent license agreement that "resolves all pending litigation between the two companies". The agreement is cited at being worth just under $500million.

William J. Merritt, president and CEO of InterDigital said in a statement: “We are very happy to have resolved the licensing dispute with Samsung on mutually agreeable terms. This agreement with Samsung shows how our longstanding patent licensing framework and process can lead to effective, productive discussions and eventual resolution on fair and reasonable terms”.

In September 2016, InterDigital signed a license agreement with Huawei, and the companies agreed to "a framework for discussions regarding joint research and development efforts."

In December 2016, Apple and InterDigital entered into a multi-year license agreement.

Mr. William J. Merritt, has been the Chief Executive Officer and President of InterDigital, Inc. since May 2, 2005. Mr. Merritt serves as the Chief Executive Officer and President of InterDigital Communications, LLC.

He served as President of InterDigital Technology Corporation from July 2001 to January 2008. Mr. Merritt served as General Patent Counsel of InterDigital Inc., from July 2001 to May 2005 and also served as President of ITC since July 2001. Mr. Merritt served as an Executive Vice President of InterDigital Inc. from September 1999 to January 2004. Prior to that, Mr. Merritt served as Senior Vice President, General Counsel and Secretary from October 1998 to July 2001 and Vice President, Legal and Assistant Secretary from January 1996 to October 1998. He has been a Director of Shared Spectrum Company since February 2014 and InterDigital, Inc.

InterDigital is headquartered in Wilmington Delaware, and has R&D offices in Conshohocken, Pennsylvania, Melville New York, and San Diego, California in the United States, London, The United Kingdom and Montreal, Quebec in Canada. In 2015 InterDigital expanded and opened an office in Seoul, South Korea.