X0303 4 2008-12-19 0000792013 HARLEYSVILLE GROUP INC HGIC 0001276066 CLARK THOMAS E 355 MAPLE AVENUE HARLEYSVILLE PA 19438 0 1 0 0 Sr VP Common Stock 2008-12-19 4 M 0 11000 19.20 A 33326 D Common Stock 2008-12-19 4 M 0 300 23.209 A 33626 D Common Stock 2008-12-19 4 S 0 11300 35.716 D 22642 D Employee Stock Option (right to buy) 19.20 2008-12-19 5 D 0 11000 0 D 2014-02-25 Common Stock 11000 0 D Employee Stock Option (right to buy) 23.209 2008-12-19 4 D 0 300 0 D 2013-05-20 Common Stock 300 0 D The total includes 316.063 shares acquired 7/14/08 by participation in the HGI Employee Stock Purchase Plan. The option vested in 2 equal annual installments beginning 5/20/04. The option vested in 2 equal annual installments beginning 2/25/05. Candace J. Shustack, as Power of Attorney for Thomas E. Clark 2008-12-23