SANTA CLARA, Calif.–(BUSINESS WIRE)–Feb. 27, 2015–
MoSys, Inc. (NASDAQ: MOSY) today announced the pricing of an
underwritten public offering of 12,500,000 shares of its common stock at
a price of $1.60 per share. The company has also granted to the
underwriters a 30-day option to acquire up to an additional 1,875,000
shares to cover overallotments in connection with the offering. After
the underwriting discount and estimated offering expenses payable by the
company, the company expects to receive net proceeds of approximately
$18,500,000, assuming no exercise of the overallotment option. The
offering is expected to close on March 4, 2015, subject to customary
closing conditions. The company’s chief executive officer and chief
operating officer have agreed to purchase 406,250 shares in the offering.

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

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

The shares described above are being offered pursuant to a registration
statement previously filed with and subsequently declared effective by
the Securities and Exchange Commission, or SEC, and a prospectus
supplement to be filed with the SEC.

This press release shall not constitute an offer to sell or the
solicitation of an offer to buy any of the securities described herein,
nor shall there be any sale of these securities in any state or
jurisdiction in which such offer, solicitation or sale would be unlawful
prior to registration or qualification under the securities laws of any
such state or jurisdiction. 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.

Safe Harbor / Forward-Looking Statements

This press release contains forward-looking statements regarding the
public offering and the intended use of proceeds from the offering.
Forward-looking statements are based on certain assumptions and
expectations of future events that are subject to risks and
uncertainties. Actual results and trends may differ materially from
those projected in any such forward-looking statements depending on a
variety of factors, including market conditions, risks associated with
the cash requirements of the company’s business and other risks
identified in the company’s most recent reports on Form 10-Q and Form
10-K filed with the SEC, as well as other reports that MoSys files from
time to time with the SEC. MoSys undertakes no obligation to update
publicly any forward-looking statement for any reason, except as
required by law, even as new information becomes available or other
events occur in the future.

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.

Source: MoSys, Inc.

MoSys, Inc.
Jim Sullivan, CFO, +1-408-418-7500
jsullivan@mosys.com
or
Shelton
Group, Investor Relations
Beverly Twing, +1-214-272-0089
Sr.
Acct. Manager
btwing@sheltongroup.com