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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Annual Report pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 for the fiscal year ended January 1 , 2021 . FORM 10 - K Transition report pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 for the transition period from to Securities registered pursuant to Section 12 ( b ) of the Act : Title of Each Class Common Stock , par value $ 0.001 per share OR Delaware ( State or other jurisdiction of incorporation or organization ) 149 Commonwealth Drive , Menlo Park , California ( Address of principal executive offices ) Commission File Number 0-18655 EXPONENT , INC . ( Exact name of registrant as specified in its charter ) ( 650 ) 326-9400 ( Registrant's telephone number , including area code ) Trading Symbol EXPO ( I.R.S. Employer Identification No. ) Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes > No 77-0218904 Name of Each Exchange on Which Registered Nasdaq Global Select Market Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No 94025 ( Zip Code ) Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Act 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 and post such files ) . Yes X No Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No 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 definitions of " large accelerated filer " , " accelerated filer " , " smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer > Accelerated filer Smaller reporting company Non - accelerated filer 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 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 . The aggregate market value of the common stock held by non - affiliates of the registrant based on the closing sales price of the common stock as reported on the NASDAQ Global Select Market on July 2 , 2020 , the last business day of the registrant's most recently completed second quarter , was $ 3,091,690,681 . Shares of the registrant's common stock held by each executive officer and director and by each entity or person that , to the registrant's knowledge , owned 10 % or more of registrant's outstanding common stock as of July 3 , 2020 have been excluded in that such persons may be deemed to be affiliates of the registrant . This determination of affiliate status is not necessarily a conclusive determination for other purposes . The number of shares of the registrant's common stock outstanding as of February 19 , 2021 was 51,803,884 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's Definitive Proxy Statement for the registrant's 2021 Annual Meeting of Stockholders to be held on June 3 , 2021 are incorporated by reference into Part III of this Annual Report on Form 10 - K .