X0306 4 2023-03-03 0000230557 SELECTIVE INSURANCE GROUP INC SIGI 0001891706 Hall Brenda M 40 WANTAGE AVENUE BRANCHVILLE NJ 07890 1 EVP, COO, Standard Lines Common Stock 2023-03-03 4 S 0 2641.0000 100.0000 D 14886.7821 D Common Stock 2023-03-06 4 S 0 547.0000 99.9874 D 0.0000 I By 401(k) plan Includes 17.6912 dividend equivalent units. Each dividend equivalent unit is the economic equivalent of one share of Selective Insurance Group, Inc. common stock. Includes 1.6286 shares acquired in Ms. Hall's 401(k) account since the date of the reporting person's last ownership report. Represents the weighted average sale price. The highest price at which shares were sold was $100.17 and the lowest price at which shares were sold was $99.80. 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. Reflects the liquidation of a 0.7264 fractional holding. /s/ Brenda M. Hall 2023-03-07