Stock FAQs

It is not necessary to change an International Mobile Machines Corporation or an InterDigital Communications Corporation stock certificate to an InterDigital, Inc. certificate. All outstanding shares of either entity were converted automatically into shares of InterDigital, Inc. on a share-for-share basis. If you would like to change your certificate, contact our Transfer Agent, American Stock Transfer & Trust Company at +1 800 937 5449 or visit www.amstock.com.

If you purchased your shares through a broker, your shares are held in street name. You need to contact that broker to make changes to your account. If you have your stock certificate, you are a shareholder of record. You may contact InterDigital's transfer agent, American Stock Transfer & Trust Company, at +1 800 937 5449 or visit www.amstock.com. Be sure to inform the transfer agent if you have a change of address.

InterDigital's common stock CUSIP number is 45867 G 101.

InterDigital went public (as International Mobile Machines Corporation) on November 12, 1981 at an initial price of $3.00 per share.

InterDigital went public (as International Mobile Machines Corporation) on November 12, 1981, and the company's common stock began trading on the NASDAQ Market under the ticker symbol IMMC. On May 26, 1992, the company's common stock began trading on the American Stock Exchange under the ticker symbol IMM. In 1992, the company changed its name to InterDigital Communications Corporation, and, on October 19, 1992, the company's ticker symbol changed to IDC. On April 26, 2000, the company's common stock began trading on the NASDAQ Market under the symbol IDCC.

On July 2, 2007, InterDigital Communications Corporation, the company's predecessor, filed a Current Report on Form 8-K announcing an internal corporate restructuring, which resulted in InterDigital, Inc. being substituted as the publicly traded company. To indicate this substitution event, NASDAQ implemented a 20-trading day transition period on July 9, 2007, temporarily changing the company's trading symbol from "IDCC" to "IDCCD." Since market open on August 6, 2007, InterDigital, Inc.'s common stock trades on the NASDAQ Global Select Market® under the ticker symbol "IDCC."

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