Armstrong World Industries, Inc. is a Pennsylvania corporation incorporated in 1891. It is an international designer and manufacturer of wall and ceiling building materials. Based in Lancaster, Pennsylvania, AWI has a global manufacturing network of 26 facilities, including nine plants dedicated to its WAVE joint venture. In 2011, Armstrong's net sales were $2.86 billion, with operating income of $239.2 million. Armstrong World Industries, Inc. emerged from Chapter 11 reorganization on October 2, 2006. Its stock began trading on the New York Stock Exchange October 18, 2006, under the ticker symbol AWI. The Armstrong World Industries, Inc. Asbestos Personal Injury Settlement Trust, holds approximately 66% of AWI's outstanding common shares. Armstrong's “Fourth Amended Plan of Reorganization, as Modified, ” dated February 21, 2006, and confirmed by U.S. District Court Judge Eduardo Robreno in August 2006, become effective Oct. 2, 2006. The Plan includes a comprehensive settlement resolving AWI's asbestos liability by establishing and funding a trust to compensate all current and future asbestos personal injury claimants. Wikipedia