UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended June 30, 2019 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 0-10004 NAPCO SECURITY TECHNOLOGIES, INC. (Exact name of Registrant as specified in its charter) (State or other jurisdiction of (I.R. ...