X0201 4 2003-09-18 0 0000878897 AMERICAN MEDICAL SECURITY GROUP INC AMZ 0001045404 RIORDAN MICHAEL T C/O AMERICAN MEDICAL SECURITY GROUP INC 3100 AMS BLVD GREEN BAY WI 54313 1 0 0 0 Common Stock 2003-09-18 4 P 0 490 21.39 A 490 I See Common Stock 2003-09-23 4 P 0 185 22.28 A 675 I See Common Stock 2003-09-24 4 P 0 229 22.61 A 904 I See Common Stock 2003-09-25 4 P 0 223 21.77 A 1127 I See Common Stock 2003-09-26 4 P 0 203 21.36 A 1330 I See Common Stock 5000 D By the Michael T. Riordan 1997 Trust. /s/ Michael T. Riordan 2003-12-03