X0305 4 2012-05-01 1 0000792013 HARLEYSVILLE GROUP INC HGIC 0001108441 GRADDICK MIRIAN M 355 MAPLE AVENUE HARLEYVILLE PA 19438 1 0 0 0 Common Stock 2012-05-01 4 D 0 26777 60 D 0 D Stock Option (Right-to-Buy) 27.2 2012-05-01 4 D 0 2500 32.8 D Common Stock 2500 0 D Stock Option (Right-to-Buy) 23.209 2012-05-01 4 D 0 2500 36.791 D Common Stock 2500 0 D Stock Option (Right-to-Buy) 20 2012-05-01 4 D 0 2500 40 D Common Stock 2500 0 D Total includes 144.051 shares acquired June 30-September 30, 2011 from participation in the Harleysville Group Inc. Dividend Reinvestment Plan. Shares of Harleysville Group common stock were cancelled and converted, pursuant to the Agreement and Plan of Merger dated September 28, 2011, by and among Harleysville Mutual, Nationwide Mutual, Nationals Sub, Inc. and Harleysville Group Inc., providing for the merger of Harleysville Mutual with and into Nationwide Mutual and Harleysville Group, Inc. with and into Nationals Sub, Inc. (the "Subsidiary Merger"), into the right to receive $60.00 in cash per share. These stock options were vested at the time of disposition. At the time of the Subsidiary Merger, all vested stock options were cancelled and converted into the right to receive a cash payment per share equal to the excess of (a) $60.00 minus (b) the exercise price payable with respect to such share of common stock subject to such option. /s/ Michael D. Keffer, as Attorney-in-Fact 2012-05-03