Investor Presentaiton

-4.0% 2006 2007 2008 2009 2010 2011 2012 2013 Strong Reserving Track Record Impact of Casualty Reserve Development on our Combined Ratio 0.0% -2.0% Disciplined reserving practices - Quarterly actuarial reserve reviews. Semi-annual independent review Independent year-end opinion Favorable reserve development in Workers Compensation, General Liability, BOP, and Bonds in 2022; partially offset by adverse trends in Commercial Auto 2014 2015 2016 2017 2018 2019 2020 2021 2022 1Q23 Seventeen consecutive years of net favorable casualty reserve development 26 SELECTIVE INSURANCE®

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