X0201 5 2003-10-31 0 0 0 0000772891 ENGINEERED SUPPORT SYSTEMS INC EASI 0001249021 LANDMANN STEVEN J C/O ENGINEERED SUPPORT SYSTEMS INC 201 EVANS LANE ST LOUIS MO 63121 0 1 0 0 VP-Finance & Controller Common Stock 1988-08-08 5 A 0 236 0 A 1274 D Common Stock 1988-08-08 5 A 0 528 0 A 528 I By ESOP Option to Purchase 0 1988-08-08 5 A 0 0 0 A 1988-08-08 1988-08-08 0 0 67500 D All shares and price data reflect a 3-for-2 stock split effected by the Company on October 31, 2003. Various dates. 08/08/1988 used to satisfy date requirements for this field. Various prices. $0 used to satisfy price requirements for this field. /s/ Steven J. Landmann 2003-12-15