X0202 4 2006-05-17 0000792013 HARLEYSVILLE GROUP INC HGIC 0001036835 CUMMINS MARK R 355 MAPLE AVENUE HARLEYSVILLE PA 19438 0 1 0 0 Exec VP, CIO, Treas Common Stock 2006-05-17 4 M 0 10000 13.25 A 31602 D Common Stock 2006-05-17 4 F 0 6771 29.02 D 22083 D Employee Stock Option, Right to Buy 13.25 2006-05-17 4 M 0 10000 0 D 2006-05-22 Common Stock 10000 137080 D Since the date of reporting person's last ownership report, he transferred 2,748 shares of Harleysville Group Inc. common stock to former spouse pursuant to a domestic relations order. The option vested in 2 equal annual installments beginning on May 22, 1997. /s/ Mark R. Cummins 2006-05-19