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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Form 10 - K > ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended January 2 , 2021 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Commission file number : 000-24049 Title of Each Class Common Stock , no par value CRA International , Inc. ( Exact name of registrant as specified in its charter ) Massachusetts ( State or other jurisdiction of incorporation or organization ) 200 Clarendon Street , Boston , MA ( Address of principal executive offices ) 04-2372210 ( I.R.S. Employer Identification No. ) 02116-5092 ( Zip code ) to 617-425-3000 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) CRAI Securities registered pursuant to Section 12 ( g ) of the Act : None Accelerated filer X Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes " No X Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Exchange Act . Yes ¨ No > Indicate by check mark whether the registrant : ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes X No " Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S T during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No Name of Each Exchange on Which Registered Nasdaq Global Select Market Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act ( Check one ) : Large accelerated filer Non - accelerated filer Smaller reporting company Emerging growth company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C.7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . DOCUMENTS INCORPORATED BY REFERENCE Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No The aggregate market value of the stock held by non - affiliates of the registrant as of June 26 , 2020 , the last business day of the registrant's most recently completed second fiscal quarter , based on the closing sale price of $ 36.95 as quoted on the NASDAQ Global Select Market as of such date , was approximately $ 276.8 million . Outstanding shares of common stock beneficially owned by executive officers and directors of the registrant and certain related entities have been excluded from this computation because these persons may be deemed to be affiliates . The fact that these persons have been deemed affiliates for purposes of this computation should not be considered a conclusive determination for any other purpose . As of February 26 , 2021 , CRA had outstanding 7,645,430 shares of common stock .