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| Traveling North on Interstate 405 Take the Bristol Street Exit, (Ramp toward Anton Blvd. / Ave. of the Arts) Turn Slight Right onto Park Center Drive Turn Left onto Anton Blvd. Turn Right into Plaza Tower, 600 Anton Blvd. Guest parking in parking structure on Left Traveling South on Interstate 405 Take the Bristol Street Exit Turn Left onto Bristol Turn Right onto Anton Blvd. Cross Over Park Center Drive Turn Left into Plaza Tower, 600 Anton Blvd. Guest Parking in parking structure on the Left Traveling South on CA-55 Freeway Take Interstate 405 N Exit, toward Long Beach Take the Bristol Street Exit, turn Right Turn Right onto Anton Blvd. Cross Over Park Center Drive Turn Left into Plaza Tower, 600 Anton Blvd. Guest Parking in parking structure on the Left Traveling North on CA- 55 Freeway Take the State Route 73 North Take Bear Street Exit Turn Right onto Bear Street Take First Right onto Paularino Avenue Turn Left onto Bristol Turn Right onto Anton Blvd. Cross Over Park Center Drive Turn Left into Plaza Tower, 600 Anton Blvd. Guest Parking in parking structure on the Left Here’s how to order a copy of the proxy materials and select a future delivery preference: Paper copies: Current and future paper delivery requests can be submitted via the telephone, Internet or email options below. Email copies: Current and future email delivery requests must be submitted via the Internet following the instructions below. If you request an email copy of current materials you will receive an email with a link to the materials. PLEASE NOTE: You must use the number in the shaded bar on the reverse side when requesting a set of proxy materials. g Internet – Go to www.investorvote.com/CBMX. Follow the instructions to log in and order a copy of the current meeting materials and submit your preference for email or paper delivery of future meeting materials. g Telephone – Call us free of charge at 1-866-641-4276 and follow the instructions to log in and order a paper copy of the materials by mail for the current meeting. You can also submit a preference to receive a paper copy for future meetings. g Email – Send email to investorvote@computershare.com with “Proxy Materials CombiMatrix Corp.” in the subject line. Include in the message your full name and address, plus the number located in the shaded bar on the reverse, and state in the email that you want a paper copy of current meeting materials. You can also state your preference to receive a paper copy for future meetings. To facilitate timely delivery, all requests for a paper copy of the proxy materials must be received by June 9, 2014. CombiMatrix Corporation 2014 Annual Meeting . Stockholder Meeting Notice CombiMatrix Corporation’s Annual Meeting of Stockholders will be held on June 17, 2014 at the Law Offices of Dorsey & Whitney, LLP, 600 Anton Boulevard, Suite 2000, Costa Mesa, California 92626 beginning at 1:00 p.m. local time. Proposals to be voted on at the meeting by stockholders of record as of April 22, 2014 are listed below along with the Board of Directors’ recommendations. The Board of Directors recommends a vote FOR each of the following nominees, and FOR Proposals 2, 3 and 4: 1. To elect the six (6) directors named in the proxy statement to serve until the 2015 annual meeting of stockholders and until their successors have been duly elected and qualified: R. Judd Jessup, Scott Gottlieb, M.D., Wei Richard Ding, Jeremy M. Jones, Robert E. Hoffman, Mark McDonough. 2. To approve an amendment to our Certificate of Incorporation to increase the maximum number of shares of our common stock authorized for issuance from 25,000,000 to 35,000,000 shares. 3. To approve the amendment and restatement of our 2006 Stock Incentive Plan to increase the number of shares of common stock available for issuance thereunder by 848,154 shares, from 1,151,846 shares to 2,000,000 shares, and to effect various other improvements thereunder. 4. To ratify the appointment of Haskell & White LLP as our independent registered public accounting firm for 2014. To act on such other business as may properly come before the Annual Meeting or any adjournment(s) or postponement(s) thereof. PLEASE NOTE – YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your shares you must vote online or request a paper copy of the proxy materials to receive a proxy card. If you wish to attend and vote at the meeting, please bring this notice with you. 01SYXC |