X0202 4 2004-09-29 0 0000026537 SENSYTECH INC STST 0001305061 Sellier Victor F 710 SPRINGVALE ROAD GREAT FALLS VA 22066 1 1 1 0 Vice President Common Stock 2004-09-29 2004-09-29 4 A 0 2404000 28.50 A 2404000 D Common Stock 2004-09-29 2004-09-29 4 A 0 800000 28.50 A 800000 I by Victor F. Sellier Grantor Retained Annuity Trust Shares received in merger between Argon Engineering Associates, Inc. and Sensytech, Inc. pursuant to which each share of Argon common stock was exchanged for two shares of Sensytech common stock, having a market value of $28.50 per share on the effective date of the merger. /s/ Victor F. Sellier 2004-10-01