X0508 4 2025-07-28 0000230557 SELECTIVE INSURANCE GROUP INC SIGI 0001500886 McCarthy Thomas A 40 WANTAGE AVENUE BRANCHVILLE NJ 07890 1 0 Common Stock 2025-07-28 4 P 0 2500.0000 77.4200 A 18746.0000 I By Trust Common Stock 2589.5720 D Represents the weighted average purchase price. The highest price at which shares were purchased was $77.4650 and the lowest price at which shares were purchased was $77.420. 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 purchased at each separate price. Includes 6.2025 dividend equivalent units. Each dividend equivalent unit is the economic equivalent of one share of Selective Insurance Group, Inc. common stock. /s/ Thomas A. McCarthy 2025-07-29