MoSys : Closes Underwritten Public Offering of Common Stock

MoSys, Inc. (NASDAQ: MOSY) today announced the closing of an underwritten public offering of 14,375,000 shares of its common stock at a price of $1.60 per share, less underwriting discounts and commissions. The shares sold in the offering reflected the underwriters' exercise in full of their over-allotment option to purchase an additional 1,875,000 shares of common stock. After the underwriting discounts and estimated offering expenses payable by the company, the company expects to receive net proceeds of approximately $21,300,000. The company's chief executive officer and chief operating officer purchased 406,250 shares in the offering.

Roth Capital Partners acted as the sole book-running manager of the offering and The Benchmark Company acted as co-manager.

The company intends to use the net proceeds from the offering for general corporate purposes, including working capital.

The shares of common stock were sold pursuant to the company's effective shelf registration statement.

This press release is for informational purposes only and does not constitute an offer to sell, or a solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

The offering of these securities was made only by means of a prospectus and related prospectus supplement. Copies of the prospectus supplement and accompanying base prospectus relating to this offering may be obtained from Roth Capital Partners, LLC, 888 San Clemente, Newport Beach, CA 92660, (800) 678-9147.

About MoSys, Inc.

MoSys, Inc. (NASDAQ: MOSY) is a fabless semiconductor company enabling leading equipment manufacturers in the networking and communications systems markets to address the continual increase in Internet users, data and services. More information is available at www.mosys.com.

MoSys is a registered trademark of MoSys, Inc. in the US and/or other countries. The MoSys logo is a trademark of MoSys, Inc. All other marks mentioned herein are the property of their respective owners.