X0306 4 2014-07-14 0 0000007431 ARMSTRONG WORLD INDUSTRIES INC AWI 0001438149 McNamara Stephen F C/O ARMSTRONG WORLD INDUSTRIES, INC. 2500 COLUMBIA AVENUE LANCASTER PA 17603 0 1 0 0 Vice President and Controller Common Stock 2014-07-14 4 M 0 5000 8.87 A 6627 D Common Stock 2014-07-14 4 S 0 5000 54.54 D 1627 D Employee Options-Right to Buy 8.87 2014-07-14 4 M 0 5000 0.00 D 2009-08-29 2014-08-29 Common Stock 5000 4881 D Options exercised and shares sold pursuant to a 10b5-1 Plan. /s/Christopher S. Parisi, Attorney-in-fact 2014-07-15