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ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 or UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 TRANSITION REPORT UNDER SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Title of each class of stock : Common Stock FORM 10 - K Delaware ( State or Other Jurisdiction of Incorporation or Organization ) Non - accelerated Commission file number : 001-37515 filer to Aqua Metals , Inc. ( Exact name of registrant as specified in its charter ) 47-1169572 ( I.R.S. Employer Identification Number ) 2500 eru Dr. McCarran , Nevada 89437 ( Address of principal executive offices ) Trading symbol AQMS ( 775 ) 525-1936 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act 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 15 ( d ) of the Exchange 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 past 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 Name of each exchange on which registered : The Nasdaq Capital Market 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 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 ( as defined in Rule 12b - 2 of the Act ) : Large accelerated filer 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 with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act .