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| Name | | Jurisdiction in which organized | | Parent | | Percentage voting securities owned |
| Mesa Underwriters Specialty Insurance Company | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Auto Insurance Company of New Jersey | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Casualty Insurance Company | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Fire and Casualty Insurance Company | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Insurance Company of America | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Insurance Company of New England | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Insurance Company of New York | | New York | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Insurance Company of South Carolina | | Indiana | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Insurance Company of the Southeast | | Indiana | | Selective Insurance Group, Inc. | | 100 | % |
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| Selective Way Insurance Company | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| SRM Insurance Brokerage, LLC. | | New Jersey | | Selective Way Insurance Company | | 75 | % |
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| | | | Selective Insurance Company of the Southeast | | 25 | % |
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| Wantage Avenue Holding Company, Inc. | | New Jersey | | Selective Insurance Group, Inc. | | 100 | % |
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| Wantage Avenue ABC, LLC. | | New Jersey | | Wantage Avenue Holding Company, Inc. | | 100 | % |