MoSys, Inc. Authorizes Stock Repurchase Plan

SUNNYVALE, Calif.--Aug. 28, 2007--MoSys, Inc. (MoSys) (NASDAQ: MOSY), the industry's leading provider of high density SoC embedded memory solutions, announced today that its board of directors authorized the Company to purchase up to $19.5 million of its common stock over the next twelve months. The share repurchases may be made from time to time in the open market subject to market conditions and other factors, including self-imposed black-out periods during which the Company and its insiders are prohibited from trading in the Company's common stock. While blackout periods typically occur towards the end of a fiscal quarter in anticipation of the public release of quarterly earnings, the Company may impose a blackout period at any time without advance public notice. These repurchases may be commenced or suspended at any time or from time to time without prior notice.

As of June 30, 2007, the Company had approximately 32 million shares outstanding and also had cash, cash equivalents and short and long term investments of approximately $88 million.

About MoSys, Inc.

Founded in 1991, MoSys (Nasdaq: MOSY) develops, licenses and markets industry-leading embedded memory IP for semiconductors. MoSys' patented 1T-SRAM(R) and 1T-FLASH(TM) technologies offer a combination of high density, low power consumption, high speed and low cost that is unmatched by other memory technologies. MoSys licensees have shipped more than 110 million chips incorporating 1T-SRAM, demonstrating excellent manufacturability in a wide range of silicon processes and applications. MoSys is headquartered at 755 N. Mathilda Avenue, Sunnyvale, California 94085. More information is available at http://www.mosys.com. 1T-SRAM is a registered trademark and 1T-FLASH is a trademark of MoSys, Inc.