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Table of Contents ☐ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) Annual Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 for the fiscal year ended June 30 , 2021 Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 for the Transition period from to or Commission File Number 0-10004 NAPCO SECURITY TECHNOLOGIES , INC . ( Exact name of Registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) 333 Bayview Avenue , Amityville , New York ( Address of principal executive offices ) Registrant's telephone number , including area code : ( 631 ) 842-9400 Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , par value $ 0.01 per share Trading Symbol ( s ) NSSC 11-2277818 ( I.R.S. Employer I.D. Number ) 11701 ( Zip Code ) Name of each exchange on which registered Nasdaq Stock Market No No 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 pursuant to Section 13 or Section 15 ( d ) of the Act . Yes ☐ 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 No Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site , if any , every Interactive Data File required to be submitted and posted 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 and post 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 . 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 Smaller reporting company Emerging growth company No " Indicate by check mark whether the Registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes □ As of December 31 , 2020 , the aggregate market value of the common stock of Registrant held by non - affiliates based upon the last sale price of the stock on such date was $ 376,476,776 . As of September 10 , 2021 , 18,351,084 shares of common stock of Registrant were outstanding . DOCUMENTS INCORPORATED BY REFERENCE Part III incorporates information by reference from the Registrant's definitive proxy statement to be filed with the Securities and Exchange Commission in connection with the solicitation of proxies for the Registrant's 2021 Annual Meeting of Stockholders .