X0303 4 2010-02-18 0000792013 HARLEYSVILLE GROUP INC HGIC 0001276066 CLARK THOMAS E 355 MAPLE AVENUE HARLEYSVILLE PA 19438 0 1 0 0 Sr VP Common Stock 2010-02-18 4 A 0 1535 0 A 26933 D Employee Stock Option Right-to-Buy 33.94 2010-02-18 4 A 0 15865 0 A 2020-02-18 Common Stock 15865 15865 D Performance Units 2010-02-18 4 A 0 1535 0 A 2013-02-18 Common Stock 1535 1535 D Represents an award of time-based restricted stock units granted under the Harleysville Group Inc. Equity Incentive Plan. Each unit represents a contingent right to receive one share of HGI common stock. Total includes 393.074 shares acquired on 1/14/2010 through participation in the HGI employee stock purchase plan The option vests in 3 equal annual installments beginning 2/18/2011. Represents performance-based restricted stock unit award at target. The performance period will end 2/18/2013, and the actual number of shares to be issued will be determined after such date based upon the achievement of identified performance goals. Each unit represents the contingent right to acquire one share of common stock. Candace J. Shustack, as Power of Attorney 2010-02-22