Calix, Inc. (NSYE: CALX), the leading global provider of cloud and software platforms, systems and services required to deliver the unified access network and smart premises of tomorrow, today announced that it has commenced an underwritten public offering of up to 1,700,000 shares of its common stock. All of the shares to be sold in the offering will be offered by Calix. In addition, Calix expects to grant the underwriters of the offering a 30-day option to purchase up to an additional 255,000 shares of common stock at the public offering price, less underwriting discounts and commissions. The offering is subject to market and other conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

Calix currently expects to use the net proceeds from this offering for working capital and other general corporate purposes, which may include capital expenditures, product development and investments in sales and marketing in the United States and internationally. Calix may also use a portion of the proceeds to fund repayment of outstanding borrowings under its line of credit.

Jefferies is acting as sole bookrunning manager for the offering. Cowen, Needham & Company, Craig-Hallum Capital Group and Northland Capital Markets are acting as co-managers for the offering.

This offering is being made pursuant to an effective shelf registration statement and prospectus and related preliminary prospectus supplement filed by the Company with the Securities and Exchange Commission. This press release shall not constitute an offer to sell or the solicitation of any 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.

Copies of the prospectus supplement and related prospectus for this offering can be obtained, when available, from Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 2nd Floor, New York, NY 10022; by phone at (877) 821-7388; or by e-mail at Prospectus_Department@Jefferies.com.

About Calix

Calix, Inc. (NYSE: CALX) – Innovative communications service providers rely on Calix platforms to help them master and monetize the complex infrastructure between their subscribers and the cloud. Calix is the leading global provider of the cloud and software platforms, systems, and services required to deliver the unified access network and smart premises of tomorrow. Our platforms and services help our customers build next generation networks by embracing a DevOps operating model, optimize the subscriber experience by leveraging big data analytics and turn the complexity of the smart, connected home and business into new revenue streams.

Forward Looking Statements

This press release may contain forward-looking statements that are based upon management's current expectations and are inherently uncertain. Forward-looking statements are based upon information available to us as of the date of this release, and we assume no obligation to revise or update any such forward-looking statement to reflect any event or circumstance after the date of this release, except as required by law. Actual results and the timing of events could differ materially from current expectations based on risks and uncertainties affecting Calix’s business. The reader is cautioned not to rely on the forward-looking statements contained in this press release. Additional information on potential factors that could affect Calix's results and other risks and uncertainties are detailed in its quarterly reports on Form 10-Q and Annual Report on Form 10-K filed with the SEC and available at www.sec.gov. Calix disclaims any obligation to publicly update or revise any forward-looking statement to reflect changes in underlying assumptions or factors, of new information, data or methods, future events or other changes.