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( Mark One ) X 0 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 August 28 , 2021 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from New York ( State or other jurisdiction of incorporation or organization ) 515 Broadhollow Road , Melville , New York ( Address of principal executive offices ) FORM 10 - K Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Class A Common Stock , par value $ 0.001 per share Large accelerated filer x MSC INDUSTRIAL DIRECT CO . , INC . ( Exact name of registrant as specified in its charter ) Commission File Number : 1-14130 ( Registrant's Accelerated filer o to ( 516 ) 812-2000 telephone number , including area code ) Trading Symbol ( s ) MSM Securities registered pursuant to Section 12 ( g ) of the Act : None 11-3289165 ( I.R.S. Employer Identification No. ) 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 o 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 o No x 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 x No o 11747 ( Zip Code ) 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 x No Non - accelerated filer o Name of each exchange on which registered New York Stock Exchange 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 . Smaller reporting company o Emerging growth company o 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 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 . x Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes o No x The aggregate market value of Class A Common Stock held by non - affiliates of the registrant as of February 26 , 2021 was approximately $ 3,942,922,360 . As of October 1 , 2021 , 46,820,265 shares of Class A Common Stock and 8,654,010 shares of Class B Common Stock of the registrant were outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's definitive proxy statement to be filed with the United States Securities and Exchange Commission in connection with the registrant's 2022 Annual Meeting of Shareholders are incorporated by reference into Part III of this Annual Report on Form 10 - K to the extent described herein .