Qualys Announces IPO

Redwood City, Calif., September 27, 2012 – Qualys, Inc. (NASDAQ: QLYS), a pioneer and leading provider of cloud security and compliance solutions, today announced the pricing of its initial public offering of 7,575,000 shares of its common stock at a price to the public of $12.00 per share. Qualys is offering 6,700,000 shares of common stock and certain selling stockholders are offering 875,000 shares of common stock. In addition, Qualys has granted the underwriters a 30-day option to purchase up to 1,136,250 additional shares of common stock offered by Qualys at the initial public offering price to cover over-allotments, if any. The shares are expected to begin trading on the NASDAQ Stock Market on September 28, 2012 under the symbol "QLYS."

J.P. Morgan Securities LLC and Credit Suisse Securities (USA) LLC are acting as joint book running managers for the offering, and RBC Capital Markets, LLC, Pacific Crest Securities LLC, Robert W. Baird & Co. Incorporated, JUMP Securities LLC, Lazard Capital Markets LLC and First Analysis Securities Corporation are acting as co-managers for the offering.

A registration statement relating to these securities has been filed with, and declared effective by, the Securities and Exchange Commission. The offering is being made only by means of a prospectus. A copy of the final prospectus relating to the offering may be obtained from: J.P. Morgan Securities LLC, Attention: Broad ridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, Phone: (866) 803-9204; or Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, New York 10010, Phone: (800) 221-1037 or [email protected].

This press release shall not constitute an offer to sell or the solicitation of an offer to buy, 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.

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Qualys Backgrounder – Company Fast Facts

Industry: Cloud Security

Founded: 1999

Founder & CEO: Philippe Courted

CFO: Don McCauley

Headquarters: Redwood City, Calif.

Offices Worldwide: 12

Employees: 300+

Customers: 5,700+

Countries: 100