Accuray Incorporated Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting to Be Held on Friday, November 18, 2011 This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. The Proxy Statement, Annual Report and other proxy materials are available at: http://www.proxyvoting.com/aray Dear Accuray Stockholder: The 2011 Annual Meeting of Stockholders of Accuray Incorporated (the “Company”) will be held at the offices of Gibson, Dunn & Crutcher LLP, 1881 Page Mill Road, Palo Alto, California 94304, on Friday, November 18, 2011, at 9:00 a.m. (PST). Proposals to be considered at the Annual Meeting: (1) To elect three Class II directors to hold office until our 2014 Annual Meeting of Stockholders, or until their respective successors have been duly elected or appointed; (2) To approve the performance measures available under the Accuray Incorporated 2007 Incentive Award Plan; (3) To hold an advisory vote on the compensation of our named executive officers (say-on-pay vote); (4) To hold an advisory vote on the frequency of holding the say-on-pay vote in the future; (5) To ratify the appointment of Grant Thornton LLP as our independent registered public accounting firm for the fiscal year ending June 30, 2012; and (6) To transact any other business as may properly come before the meeting, including any motion to adjourn to a later date to permit further solicitation of proxies, if necessary, or any adjournment or postponement of the meeting. The Board of Directors recommends a vote “FOR” the election of directors in Proposal 1, “FOR” approval of Proposals 2, 3 and 5, and every “ONE YEAR” for Proposal 4. The Board of Directors has fixed the close of business on September 22, 2011 as the record date (the “Record Date”) for the determination of stockholders entitled to receive notice of and to vote at the Annual Meeting or any adjournment(s) thereof. ACCURAY INCORPORATED If you want to receive a paper or e-mail copy of these documents, you must request one. There is no charge to you for requesting a copy. Please make your request for a copy as instructed below on or before November 8, 2011 to facilitate timely delivery. TO REQUEST PAPER COPIES OF PROXY MATERIALS: (please reference your 11-digit control number when requesting materials) If you opt to receive printed materials, your preference for future proxy mailings will be kept on our file. Telephone: 1-888-313-0164 (outside of the U.S. and Canada call 201-680-6688). Email: shrrelations@bnymellon.com (you must reference your 11-digit control number in your email) Internet: http://www.proxyvoting.com/aray CONTROL NUMBER 06098/08956 TO VOTE YOUR SHARES SEE INSTRUCTIONS ON REVERSE SIDE This is not a proxy card. You cannot use this notice to vote your shares. YOU MUST REFERENCE YOUR 11-DIGIT CONTROL NUMBER WHEN YOU REQUEST A PAPER COPY OF THE PROXY MATERIALS OR TO VOTE YOUR PROXY ELECTRONICALLY OR BY TELEPHONE.

Stockholders of record as of the Record Date are encouraged and cordially invited to attend the Annual Meeting. Directions to attend the annual meeting where you may vote in person can be found on our website, www.accuray.com. Meeting Location: Gibson, Dunn & Crutcher LLP 1881 Page Mill Road Palo Alto, CA 94304 To receive directions to the Annual Meeting, please visit our website, www.accuray.com. The following materials are available for you to review online: • the Company’s 2011 Proxy Statement (including all attachments thereto); • the Company’s Annual Report for the year ended June 30, 2011 (which is not deemed to be part of the official proxy soliciting materials); and • any amendments to the foregoing materials that are required to be furnished to stockholders. To request a paper copy of the Proxy Materials: (you must reference your 11-digit control number located on the reverse side of this form) Telephone: 1-888-313-0164 (outside of the U.S. and Canada call 201 -680-6688) Email: shrrelations@bnymellon.com (you must reference your 11-digit control number in your email) Internet: http://www.proxyvoting.com/aray The Proxy Materials for Accuray Incorporated are available to review at: http://www.proxyvoting.com/aray Have this notice available when you request a PAPER copy of the Proxy Materials, when you want to view your proxy materials online OR WHEN YOU WANT TO VOTE YOUR SHARES ELECTRONICALLY. 06098/08956 HOW TO VOTE BY INTERNET We encourage you to review the proxy materials online before voting. You can use the Internet to vote your shares. On the landing page of the above website in the box labeled “To Vote Your Shares by Internet” click on “Vote Now” to access the electronic proxy card and vote your shares. Have this notice in hand when you access the website. You will need to reference the 11-digit control number located on the reverse side.