X0305 4 2012-03-31 0000030554 DUPONT E I DE NEMOURS & CO DD 0001120652 BROWN RICHARD H 1007 MARKET STREET D-9000 WILMINGTON DE 19898 1 0 0 0 Common Stock 2012-03-31 4 A 0 157.5298 52.90 A 39628.4662 D Includes direct ownership, unvested RSUs and vested deferred stock units. Mary E. Bowler by Power of Attorney 2012-04-03