X0304 4 2012-02-28 0 0000007431 ARMSTRONG WORLD INDUSTRIES INC AWI 0001509566 Grizzle Victor C/O ARMSTRONG WORLD INDUSTRIES, INC. 2500 COLUMBIA AVE LANCASTER PA 17603 0 1 0 0 Executive V.P., Armstrong Bdg Stock Options 50.38 2012-02-28 4 A 0 23536 0.00 A 2022-02-28 Common Stock 23536 61345 D The stock options will vest and become exercisable as follows: (1) 7,845 shares on the first anniversary of the grant; (2) 7,845 shares on the second anniversary of the grant; and (3) 7,846 shares on the third anniversary of the grant (contingent upon the Reporting Person's employment with the Issuer on the scheduled vesting date, except as provided for under the Issuer's 2011 Long-Term Incentive Plan). /s/Robert J. Sandkuhler, Attorney-in-fact 2012-03-01