SELECTIVE INSURANCE GROUP INC

Selective Insurance Group, Inc. ("Parent") is a New Jersey insurance holding company incorporated in 1977. It owns ten property and casualty insurance subsidiaries ("Insurance Subsidiaries") that sell products and services only in the United States ("U.S.") and exclusively through independent insurance agents and wholesale brokers. Nine of our Insurance Subsidiaries are licensed by various state insurance departments as admitted carriers, allowing them to write specific property and casualty lines in the standard market. The tenth subsidiary is authorized as a non-admitted carrier to write property and casualty insurance in the excess and surplus ("E&S") lines market. Throughout this document, we refer to the Parent and the Insurance Subsidiaries collectively as "we," "us," or "our." We use "Parent" when appropriate to distinguish it from the Insurance Subsidiaries. Specific terms related to the property and casualty industry are defined in a glossary attached as Exhibit 99.1 to this Form 10-K. We have a long and successful history in the property and casualty insurance industry dating back to our 1926 founding. We list our common (stock symbol "SIGI") and preferred (stock symbol "SIGIP") stocks on the Nasdaq Global Select Market. In 2025, AM Best Company ("AM Best") ranked us as the 34th largest property and casualty group in its annual "Top 200 U.S. Property/Casualty Writers" list based on 2024 net premiums written ("NPW"). Our current AM Best financial strength rating is "A+" (Superior).