As filed with the Securities and Exchange Commission on May 6, 2010

Registration No. 333-                  

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

ACCURAY INCORPORATED

(Exact name of registrant as specified in its charter)

1310 Chesapeake Terrace
Sunnyvale, California 94089

(Address of Principal Executive Offices including Zip Code)

Accuray Incorporated 2007 Incentive Award Plan

Accuray Incorporated 2007 Employee Stock Purchase Plan

(Full Title of the Plan)

(Name and Address, Including Zip Code, and Telephone Number,
Including Area Code, of Agent for Service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

CALCULATION OF REGISTRATION  FEE

EXPLANATORY NOTE

Accuray Incorporated (the “Company” or the “Registrant”) filed with the Securities and Exchange Commission (the “Commission”) on March 9, 2007, (i) a registration statement on Form S-8 (File No. 333-141194) relating to 9,000,000 shares of Common Stock to be offered and sold under the 2007 Plan and (ii) a registration statement on Form S-8 (File No. 333-141195) relating to 4,000,000 shares of Common Stock to be offered and sold under the ESPP, and on February 5, 2009, the Company filed with the Commission a registration statement on Form S-8 (File No. 333-157120) relating to an additional 1,500,000 shares of Common Stock to be offered and sold under the 2007 Plan and 545,889 shares of Common Stock to be offered and sold under the ESPP (collectively, the “Prior Registration Statements”).  The Registrant is hereby registering an additional 1,500,000 shares of Common Stock issuable under the 2007 Plan and 566,492 shares of Common Stock issuable under the ESPP, none of which has been issued as of the date of this Registration Statement.

This Registration Statement relates to securities of the same class as those to which the Prior Registration Statements relate, and is submitted in accordance with General Instruction E to Form S-8 regarding Registration of Additional Securities. Pursuant to Instruction E of Form S-8, the contents of the Prior Registration Statements are incorporated herein by reference and made part of this Registration Statement, except as amended hereby.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.           Incorporation of Documents by Reference

The following documents, which were filed with the Commission, are incorporated herein by reference (excluding any portions of such documents that have been “furnished” but not “filed” for purposes of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)):

(a)          The Company’s Annual Report on Form 10-K for the fiscal year ended June 27, 2009, filed with the Commission on September 9, 2009 (File No. 001-33301) (including portions incorporated by reference to the Company’s proxy statement on Schedule 14A); and

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(b)         The Company’s Quarterly Reports on Form 10-Q for the fiscal quarters ended September 30, 2009, December 31, 2009 and March 31, 2010, filed with the Commission on November 6, 2009, February 4, 2010 and May 6, 2010, respectively (File No. 001-33301);

(c)          The Company’s Current Reports on Form 8-K filed with the Commission on July 21, 2009, September 10, 2009, October 20, 2009, December 15, 2009, January 8, 2010, January 14, 2010, March 17, 2010, April 12, 2010 and April 21, 2010 (File No. 001-33301); and

(d)         The description of the Common Stock contained in the Company’s Registration Statement on Form 8-A filed with the Commission on February 7, 2007 (File No. 001-33301), including any subsequently filed amendments and reports updating that description.

All documents subsequently filed by the Registrant pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this Registration Statement and before the filing of a post-effective amendment stating that all securities offered hereby have been sold or deregistering all securities then remaining unsold, shall be deemed to be incorporated by reference herein and to be a part of this Registration Statement from the date of the filing of such documents. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained in this Registration Statement, or in any other subsequently filed document which also is or is deemed to be incorporated by reference in this Registration Statement, modifies or supersedes such statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to be a part of this Registration Statement.  Information contained in a Current Report on Form 8-K furnished to the Commission will not be incorporated by reference into this Registration Statement.

Item 8.           Exhibits

See Index to Exhibits following the signature page.

Item 9.  Undertakings

(a)   The undersigned Registrant hereby undertakes:

(1)     To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i)    To include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii)   To reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration Statement.  Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective Registration Statement.

(iii)  To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the Registration Statement;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement.

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(2)     That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3)     To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(b)   The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c)   Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable.  In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

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SIGNATURES

Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all the requirements for filing on Form S-8 and has duly caused this Registration Statement on Form S-8 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Sunnyvale, State of California, on the 6th day of May 2010.

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POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Euan S. Thomson and Derek Bertocci and each of them acting individually, as his or her true and lawful attorneys-in-fact and agents, with full power of each to act alone, with full powers of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this registration statement on Form S-8, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, with full power of each to act alone, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully for all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or his, her or their substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement on Form S-8 has been signed by the following persons in the capacities and on the dates indicated.

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INDEX TO EXHIBITS

EXHIBIT

(1)          Incorporated by reference to the same numbered exhibit to Amendment No. 4 to Registrant’s Registration Statement on Form S-1 filed with the Securities and Exchange Commission on February 5, 2007 (No. 333-138622).

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Exhibit 5.1

May 6, 2010

Accuray Incorporated

1310 Chesapeake Terrace

Sunnyvale, CA 94089

Re:  Registration Statement on Form S-8

Ladies and Gentlemen:

We have examined the Registration Statement on Form S-8 to be filed by you with the Securities and Exchange Commission on or about May 6, 2010 (the “Registration Statement”) in connection with the registration under the Securities Act of 1933, as amended, of 1,500,000 shares of your Common Stock under the 2007 Incentive Award Plan and 566,492 shares of your Common Stock under the 2007 Employee Stock Purchase Plan (collectively the “Shares”).  As your legal counsel in connection with this transaction, we have examined the proceedings taken and proposed to be taken in connection with the issuance and sale of the Shares pursuant to the 2007 Incentive Award Plan and 2007 Employee Stock Purchase Plan (collectively the “Plans”).

It is our opinion that the Shares, when issued and sold in the manner described in the Plans and pursuant to the agreements that accompany the Plans, will be legally and validly issued, fully-paid and non-assessable.

We consent to the use of this opinion as an exhibit to the Registration Statement, and further consent to the use of our name wherever appearing in the Registration Statement and any amendments thereto.

Exhibit 23.2

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated September 8, 2009 with respect to the consolidated financial statements and internal control over financial reporting of Accuray Incorporated and subsidiaries included in the Annual Report on Form 10-K for the year ended June 27, 2009, which are incorporated by reference in this Registration Statement.  We consent to the incorporation by reference in the Registration Statement of the aforementioned reports.

/s/ Grant Thornton LLP

San Francisco, California

May 6, 2010