UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2018 Commission File Number 1-5794 MASCO CORPORATION (Exact name of Registrant as Specified in its Charter) Delaware 38-1794485 (State of Incorporation) (I.R.S. Employer Identification No.) 17450 College Parkway, Livonia, Michigan 48152 (Address of Principal Executive Offices) (Zip Code) Registrant's teleph ...