Rubicon Technology, Inc. (NASDAQ: RBCN), a leading provider of sapphire substrates and products to the LED, semiconductor and optical markets, today announced the sale of US$ 28.2 million of its common stock pursuant to an underwriting agreement with Canaccord Genuity Inc. The last reported sale price of Rubicon’s common stock as reported by the NASDAQ Global Market on January 7, 2014 was US$ 11.44 per share.

Rubicon intends to use the net proceeds to fund research and development of new products, for capacity expansion and for general corporate purposes. Closing of the offering is expected to occur on or about January 14, 2014, subject to customary closing conditions. In addition, Rubicon has granted the underwriter a 30-day option to purchase additional shares of common stock equal to up to 15% of the number of shares of common stock sold in the offering.

Canaccord Genuity Inc. is acting as sole book-running manager for the offering.

The offering is being made pursuant to an effective shelf registration statement filed with the Securities and Exchange Commission. This press release does not constitute an offer to sell or a solicitation of an offer to buy securities nor shall there be any sale of these securities in any state 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, when available, and accompanying prospectus may be obtained by sending a request to the offices of Canaccord Genuity, Attn: Syndicate Department, 99 High Street, 12th Floor, Boston, MA 02110, phone: 1-800-225-6201. Alternatively, you may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov.