Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 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 1-5581 I.R.S. Employer Identification Number 59-0778222 WATSCO, INC. (a Florida Corporation) 2665 South Bayshore Drive, Suite ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities and Exchange Act of 1934 For the Fiscal Year Ended December 31, 2018 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 1-5581 WATSCO, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or or ...