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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 April 30 , 2021 Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 or Commission File Number : 001-37784 GMS INC . ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) 100 Crescent Centre Parkway , Suite 800 , Tucker , Georgia ( Address of principal executive offices ) Title of each class Common Stock , par value $ 0.01 per share 46-2931287 GMS ( I.R.S. Employer Identification No. ) ( 800 ) 392-4619 ( Registrant's telephone number , including area code ) SECURITIES REGISTERED PURSUANT TO SECTION 12 ( b ) OF THE ACT : Trading Symbol ( s ) 30084 ( Zip code ) Name of each exchanged on which registered New York Stock Exchange 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 and post 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 . Large accelerated filer 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 any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . with 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 Exchange Act ) . Yes No The aggregate market value of the common stock of the Registrant held by non - affiliates of the Registrant on October 31 , 2020 , the last business day of the Registrant's most recently completed second fiscal quarter , was $ 961.7 million ( based on the closing sale price of the Registrant’s common stock on that date as reported on the New York Stock Exchange ) . There were 43,077,267 shares of the registrant's common stock , par value $ 0.01 per share , outstanding as of May 31 , 2021 . DOCUMENTS INCORPORATED BY REFERENCE : Portions of the Registrant's Definitive Proxy Statement for its Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10 - K .