MoSys announced it will release its fourth quarter and full year 2011 financial results on Tuesday, February 7, 2012 after the market close. Following the press release, Len Perham, MoSys' President and Chief Executive Officer, and Jim Sullivan, Chief Financial Officer, will host a live audio webcast and conference call at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time).

Fourth Quarter and 2011 Conference Call and Webcast Information:

Date: Tuesday, February 7, 2012 Time: 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time) Conference Call Number: 1-800-599-9816 International Call Number: 1-617-847-8705 Pass Code: 24242598

The conference call replay will be available for 2 business days, beginning two hours after the call. The replay dial-in number is 1-888-286-8010, and the pass code is 41459235. International callers should dial +1-617-801-6888 and enter the same pass code at the prompt. Additionally, this conference call will be broadcast live over the Internet and can be accessed by all interested parties on the Investor Relations section of the Company's website.