Armstrong World Industries(AWI) - 2019 Q4 - Annual Report

Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $0.01 par value per share AWI New York Stock Exchange Securities registered pursuant to Section 12(g) of the Act: None 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 December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EX ...