Page 1

( 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 FORM 10 - K For the fiscal year ended December 29 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number : 001-36197 DEL TACO RESTAURANTS , INC . Title of each class Common Stock , $ 0.0001 Par Value Delaware ( State or other jurisdiction of incorporation or organization ) ( Exact name of registrant as specified in its charter ) 25521 Commercentre Drive Lake Forest , California ( Address of principal executive offices ) 46-3340980 ( I.R.S. Employer Identification Number ) ( 949 ) 462-9300 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) TACO 92630 ( Zip Code ) Name of each exchange on which registered The Nasdaq Stock Market 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 Indicate by check mark if the registrant is not required to file reports by Section 13 or Section 15 ( d ) of the Act . Yes No 冈 No 冈