X0201 5/A 2003-12-31 2004-03-22 0 0 1 0001163842 ANTEON INTERNATIONAL CORP ANT 0001168686 DECKER GILBERT F 3211 JERMANTOWN ROAD SUITE 700 FAIRFAX VA 22030 1 0 0 0 Common Stock $0.01 par value per share ("Common Stock") 2003-12-30 5 G 0 L 285 0 D 23530 D Common Stock $0.01 par value per share ("Common Stock") 2003-03-14 4 S 0 L 3000 21.85 D 23530 D Rose A Gillard/Attroney-in-Fact 2004-04-21