X0306 4 2019-05-03 0 0000230557 SELECTIVE INSURANCE GROUP INC SIGI 0001470648 Nicholson Cynthia S 40 WANTAGE AVENUE BRANCHVILLE NJ 07890 1 0 0 0 Common Stock 2019-05-03 4 A 0 2329 0 A 31112.8692 D Common Stock 2019-05-03 4 M 0 1989 16.71 A 33101.8692 D Common Stock 2019-05-03 4 S 0 1989 70.8082 D 31112.8692 D Common Stock 2019-05-03 4 S 0 9786 70.9523 D 21326.8692 D Stock Option 16.71 2019-05-03 4 M 0 1989 0 D 2011-04-30 2020-04-30 Common Stock 1989 5964 D Includes the award of 1,129 restricted stock units that will vest on May 03, 2020. Includes 17.643 dividend equivalent units. Each dividend equivalent unit is the economic equivalent of one share of Selective Insurance Group, Inc. common stock. Represents the weighted average sale price. The highest price at which shares were sold was $70.955 and the lowest price at which shares were sold was $70.75. The reporting person hereby undertakes to provide upon request to the SEC's staff, the issuer or its security holders, full information regarding the number of shares sold at each separate price. Represents the weighted average sale price. The highest price at which shares were sold was $71.14 and the lowest price at which shares were sold was $70.76. The reporting person hereby undertakes to provide upon request to the SEC's staff, the issuer or its security holders, full information regarding the number of shares sold at each separate price. /s/ Cynthia S. Nicholson 2019-05-07