X0201 4 2003-11-26 0 0001005387 GENSYM CORP GNSM 0001162729 ASHTON ROBERT B 6 OCCOM RIDGE HANOVER NH 03755 0 0 1 0 Common Stock 2003-11-26 4 P 0 5000 .90 A 832900 D Common Stock 2003-12-01 4 P 0 5500 1.00 A 838400 D Common Stock 2003-12-02 4 P 0 10000 1.10 A 848400 D Common Stock 2003-12-03 4 P 0 3000 1.10 A 851400 D Robert B. Ashton 2003-12-03