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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K X ANNUAL REPORT UNDER SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30 , 2021 TRANSITION REPORT UNDER SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 1-10799 ADDvantage Technologies Group , Inc. ( Exact name of registrant as specified in its charter ) Oklahoma ( State or other jurisdiction of incorporation or organization ) 1430 Bradley Lane , Suite 196 , Carrollton , Texas ( Address of principal executive offices ) Title of each class Common Stock , $ .01 par value 73-1351610 Trading Symbol AEY ( I.R.S. Employer Identification No. ) Registrant's telephone number : ( 918 ) 251-9121 Securities registered under Section 12 ( b ) of the Act : 75007 ( Zip code ) Name of exchange on which registered NASDAQ Global Market Securities registered under 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 . Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Act . 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 . Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted 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 ) . Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non accelerated filer , 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 x Smaller Reporting Company x 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 . 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 Act ) . The aggregate market value of the outstanding shares of common stock , par value $ .01 per share , held by non - affiliates computed by reference to the closing price of the registrant's common stock as of March 31 , 2021 was $ 22,959,185 . The number of shares of the registrant's outstanding common stock , $ .01 par value per share , was 12,739,686 as of December 27 , 2021 . Yes Yes Yes Yes Yes X X No No No No No X X X