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( Mark One ) 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 January 2 , 2021 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from FORM 10 - K to Delaware State or other jurisdiction of Incorporation Commission File Number 001-33987 C Crystal Clean® HERITAGE - CRYSTAL CLEAN , INC . ( Exact name of registrant as specified in its charter ) 2175 Point Boulevard Suite 375 26-0351454 1 ( I.R.S. Employer Identification No. ) Elgin , IL 60123 ( Address of principal executive offices ) ( Zip Code ) Registrant's telephone number , including area code ( 847 ) 836-5670