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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 December 31 , 2020 . Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 for the transition period from ARCBEST CORPORATION ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) to Commission file number 0-19969 8401 McClure Drive , Fort Smith , Arkansas ( Address of principal executive offices ) Title of each class Common Stock , $ 0.01 Par Value 71-0673405 ( I.R.S. Employer Identification No. ) Registrant's telephone number , including area code 479-785-6000 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) . ARCB Securities registered pursuant to Section 12 ( g ) of the Act : None ( Title of Class ) 72916 ( Zip Code ) Name of each exchange on which registered The Nasdaq Global Select Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes X No 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 X Large accelerated filer > Non - accelerated filer 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 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 ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . 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 the definitions of " large accelerated filer , ” “ accelerated filer , " " smaller reporting company , ” and “ emerging growth company ” in Rule 12b - 2 of the Exchange Act . 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 . O Indicate by check mark ether the registrant filed a report on and attestation to its management's assessment of 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 . 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 Common Stock held by nonaffiliates of the registrant , based on the closing price of the shares of Common Stock on the Nasdaq Global Select Market as of June 30 , 2020 , was $ 658,708,492 . The number of shares of Common Stock , $ 0.01 par value , outstanding as of February 19 , 2021 , was 25,397,696 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's Definitive Proxy Statement to be filed pursuant to Regulation 14A of the Securities Exchange Act of 1934 in connection with the registrant's Annual Stockholders ' Meeting to be held April 29 , 2021 , are incorporated by reference in Part III of this Form 10 - K .