On February 11, 2009, TomoTherapy Incorporated (the "Company") issued a press release announcing its financial results for the quarter ended December 31, 2008. A copy of the Company's press release dated February 11, 2009, titled "TomoTherapy Reports Fourth Quarter Financial Results" is attached hereto as Exhibit 99.1.

Exhibit 99.1 contains forward-looking statements within the meaning of the federal securities laws. These statements are present expectations, and are subject to the limitations listed therein and in the Company's other reports filed with the Securities and Exchange Commission, including that actual events or results may differ materially from those in the forward-looking statements.

The foregoing information (including the exhibit hereto) is being furnished under "Item 2.02 Results of Operations and Financial Condition" (including the exhibit hereto) and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

(d) Exhibits.

Number                                  Description
 99.1     Press Release dated February 11, 2009, titled "TomoTherapy Reports
          Fourth Quarter Financial Results"