Armstrong World Industries | SC 13G/A: Statement of acquisition of beneficial ownership by individuals (Amendment)-Capital International Investors(6.0%)
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Kirchner-King Dawn M.
Armstrong World Industries | 3: Initial statement of beneficial ownership of securities-Officer Kirchner-King Dawn M.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Burge James T.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Crager Jill A.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Hershey Mark A
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Calzaretta Christopher P.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Grizzle Victor
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Burge James T.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Burge James T.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Crager Jill A.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer So Austin
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Hershey Mark A
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Calzaretta Christopher P.
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer Grizzle Victor
Armstrong World Industries | SC 13G/A: Statement of acquisition of beneficial ownership by individuals (Amendment)-The London Company(5.99%)
Armstrong World Industries | SC 13G/A: Statement of acquisition of beneficial ownership by individuals (Amendment)-Capital International Investors(12.6%)
Armstrong World Industries | 4: Statement of changes in beneficial ownership of securities-Officer So Austin
Armstrong World Industries | SC 13G/A: Statement of acquisition of beneficial ownership by individuals (Amendment)-The Vanguard Group(10.78%)
Armstrong World Industries | SC 13G: Statement of acquisition of beneficial ownership by individuals-BlackRock, Inc.(12.6%)
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