The corrected release reads:

RUBICON TECHNOLOGY WILL PRESENT AT INVESTOR CONFERENCES

Rubicon Technology, Inc. (NASDAQ:RBCN), a leading provider of sapphire substrates and products to the LED, semiconductor, and optical industries, today announced that Bill Weissman, Vice President Finance and Chief Financial Officer, will present at the following investor conferences, and that these presentations will be webcast:

• Canaccord Genuity Growth Conference , Tuesday, August 14, 2012, 4:00 p.m. Eastern Time.
• Oppenheimer & Co. Technology, Internet & Communications Conference, Wednesday, August 15, 2012, 3:05 p.m. Eastern Time.

The audio-only webcasts will be broadcast live at http://rubicon-es2.com/index.php?page_id=5 under “Events” and will be archived for a limited time.

The Company also plans to participate in the J.P. Morgan LED General Lighting Symposium on August 30, 2012, which will not be webcast.

About Rubicon Technology

Rubicon Technology, Inc. is an advanced electronic materials provider that is engaged in developing, manufacturing and selling monocrystalline sapphire and other crystalline products for light-emitting diodes (LEDs), radio frequency integrated circuits (RFICs), blue laser diodes, optoelectronics and other optical applications. The Company applies its proprietary crystal growth technology to produce very high-quality sapphire in a form that allows for volume production of various sizes and orientations of substrates and windows. Rubicon is a vertically-integrated manufacturer with capabilities in crystal growth, high precision core drilling, wafer slicing, surface lapping, large-diameter polishing and wafer cleaning processes, which the Company employs to convert the bulk crystal into products with the quality and precision specified by its customers. The Company is the world leader in larger diameter products to support next-generation LED, RFIC and optical window applications.

Further information is available at www.rubicon-es2.com.