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( Mark One ) ☑ ㅁ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 10 - Q Quarterly Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 For the quarterly period ended September 30 , 2021 or Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 Delaware ( State of Incorporation ) 3900 McCarty Lane Lafayette Indiana For the transition period from to Commission File Number : 001-10883 WABASH NATIONAL CORPORATION ( Exact name of registrant as specified in its charter ) ( Address of Principal Executive Offices ) WABASH NATIONAL 52-1375208 ( IRS Employer Identification Number ) Registrant's telephone number , including area code : ( 765 ) 771-5310 Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , $ 0.01 par value Trading Symbol ( s ) WNC 47905 ( Zip Code ) Name of each exchange on which registered New York Stock Exchange 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 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 " " emerging and growth Large accelerated filer □ company " Non - accelerated filer □ Emerging growth company □ in Rule 12b - 2 of Accelerated filer × Smaller reporting company ☐ the Exchange Act . 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 is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes □ No ☑ The number of shares of common stock outstanding at November 3 , 2021 was 49,477,016 .