Investor Presentaiton

Excellent Historical Operating Results Historical GAAP Combined Ratios 2022 Highlights SELECTIVE INSURANCE® 100% 95.8% 95% 95.2% COVID-19 and elevated catastrophes 90% -Underlying Combined Ratio** 85% -Reported Combined Ratio - GAAP combined ratio of 95.1% - NPW growth of 12% 96.5% - 95.1% 93.3% 92.0%* 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023F *2023F combined ratio estimate is ex-cat and assumes no additional prior year casualty reserve development ** Underlying GAAP combined ratio excludes catastrophe losses and prior year casualty reserve development • After-tax net investment income of $232 million 2023 Guidance¹ - GAAP combined ratio of 96.5% includes net catastrophe losses of 4.5 points and assumes no additional prior year casualty reserve development - $300 million of after-tax net investment income, including $30 million from alternative investments 21% overall effective tax rate 61 million weighted average shares ¹as of May 4, 2023 10

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