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( Mark One ) Annual Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the Fiscal Year Ended December 31 , 2020 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 : 001-10883 Delaware UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( State of Incorporation ) 1000 Sagamore Parkway South Lafayette Indiana ( Address of Principal Executive Offices ) WABASH NATIONAL CORPORATION ( Exact name of registrant as specified in its charter ) WABASH NATIONAL Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , $ .01 Par Value to Registrant's telephone number , including area code : ( 765 ) 771-5300 Trading Symbol ( s ) 52-1375208 ( IRS Employer Identification Number ) 47905 ( Zip Code ) Name of each exchange on which registered New York Stock Exchange WNC 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 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 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 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 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 Act ) . Yes No The aggregate market value of voting stock held by non - affiliates of the registrant as of June 30 , 2020 was $ 556,508,720 based upon the closing price of the Company's common stock as quoted on the New York Stock Exchange composite tape on such date . The number of shares outstanding of the registrant's common stock as of February 12 , 2021 was 52,056,803 . Part III of this Form 10 - K incorporates by reference certain portions of the registrant's Proxy Statement for its Annual Meeting of Stockholders to be filed within 120 days after December 31 , 2020 .