SELECTIVE INSURANCE GROUP INC

Insurance Operations

The following table provides quantitative information for analyzing the combined ratio:

NPW grew 5% in Second Quarter 2025 and 6% in Six Months 2025 compared to the same prior-year periods, driven by renewal pure price increases that were partially offset by a modest decrease in policy count and lower new business. In addition to the below, NPW also benefited from exposure growth on renewal policies.

NPE grew 10% in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods, reflecting NPW growth over the last 12 months.

Details of prior year casualty reserve development by line of business follow:

Paid loss severities in recent prior accident years continued to show higher-than-expected emergence, leading us to record unfavorable prior year casualty reserve development in Second Quarter 2025 of (i) $25 million in our commercial automobile line of business primarily driven by accident years 2022 through 2024, and (ii) $20.0 million in our general liability line of business primarily driven by accident years 2022 and 2023.

The unfavorable prior year casualty reserve development in Second Quarter 2024 and Six Months 2024 was primarily driven by our general liability line of business that experienced increased severities in accident years 2020 through 2023.

The reduction in the prior year casualty reserve development was partially offset by higher current year loss costs in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods, driven by elevated severity trend assumptions attributable to social inflation on our general liability and E&S casualty lines of business.

For additional qualitative discussion on prior year casualty reserve development and current year casualty loss costs, refer to the insurance segment sections below.

Net catastrophe and non-catastrophe property losses reduced the loss and loss expense ratio by 4.3 points in Second Quarter 2025 and 3.2 points in Six Months 2025 compared to the same prior-year periods. The net catastrophe loss and loss expense ratio was 1.7 points lower in Second Quarter 2025 and 1.5 points lower in Six Months 2025 compared to the same prior-year periods, as fewer storms impacted our footprint. The non-catastrophe property loss and loss expense ratio was 2.6 points lower in Second Quarter 2025 and 1.7 points lower in Six Months 2025 compared to the same prior-year periods, reflecting (i) the earned impact of higher renewal pure price increases in 2025, (ii) lower claim frequencies, and (iii) normal variability from period to period of non-catastrophe property losses.

For additional qualitative discussion on non-catastrophe property loss and loss expenses, refer to the insurance segment sections below.

Underwriting Expenses

The underwriting expense ratio increased 0.5 points in Second Quarter 2025 and 0.6 points in Six Months 2025 compared to the same prior-year periods, primarily due to higher profit-based compensation to our distribution partners and employees, reflecting comparatively improved results.

Standard Commercial Lines Segment

NPW and NPE growth in Second Quarter 2025 and Six Months 2025, compared to the same prior-year periods, primarily reflected renewal pure price increases and strong exposure growth on renewal policies, partially offset by lower new business and lower retention.

The details of the prior year casualty reserve development by line of business were as follows:

The reduction in unfavorable prior year reserve development in Second Quarter 2025 and Six Months 2025 was partially offset by higher current year casualty loss costs. The increase in current year casualty loss costs in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods was primarily driven by higher loss trend expectations and increased claim severities, which we attribute to the continued impacts of social inflation. Prior-year severities developed adversely over the course of 2024 and impacted our view of current year loss costs for 2025, resulting in higher current year casualty loss costs this year compared to last.

Refer to the line of business sections below for qualitative discussion on the significant drivers of unfavorable prior year casualty reserve development and current year casualty loss costs.

Net catastrophe and non-catastrophe property losses reduced the loss and loss expense ratio by an aggregate 1.1 points in Second Quarter 2025 and 1.6 points in Six Months 2025 compared to the same prior-year periods. Net catastrophe losses were 0.6 points lower in Second Quarter 2025 and 1.5 points lower in Six Months 2025 compared to the same periods last year, driven by lower frequency of wind and winter storm events. Non-catastrophe property losses were 0.5 points lower in Second Quarter 2025 and 0.1 points lower in Six Months 2025 compared to the same periods last year, driven by the factors described in the "Insurance Operations" section above.

Underwriting Expenses

The underwriting expense ratio increased 0.5 points in Second Quarter 2025 and 0.6 points Six Months 2025 compared to the same prior-year periods. These increases were primarily due to higher profit-based compensation to our distribution partners and employees, reflecting comparatively improved results.

Information about our most significant Standard Commercial Lines of business follows:

NPW grew 7% in Second Quarter 2025 and 8% in Six Months 2025 compared to the same prior-year periods, benefiting from renewal pure price increases and renewal exposure growth.

The combined ratio decreased 49.1 points in Second Quarter 2025 and 27.4 points in Six Months 2025 compared to the same prior-year periods and included the following:

We recorded $20 million of unfavorable prior year casualty reserve development in Second Quarter 2025 and Six Months 2025, compared to $166 million and $216 million in Second Quarter 2024 and Six Months 2024, respectively. While less this year, we attribute the unfavorable development to the same social inflationary factors that drove reported development in Second Quarter 2024 and Six Months 2024. Specifically, the development in Second Quarter 2025 was primarily driven by increased severities in accident years 2022 and 2023 and the development in Second Quarter 2024 and Six Months 2024 was driven by increased severities in accident years 2023 and prior.

The general liability line of business has experienced a long-term historical trend of meaningful severity increases, partially offset by claim frequency decreases. Prior-year severities developed adversely, which have impacted our view of more recent accident years in 2024 and 2025. We attribute the increased severities to elevated social inflation, which we view as an industry dynamic characterized by higher claimant propensity for attorney representation and litigation, longer settlement times, and higher settlement values. Certain jurisdictions with expanded liability theories and higher damage awards pose increased challenges. We are closely monitoring these jurisdictions and the broader trends across our business.

Partially offsetting the decrease in unfavorable prior year casualty reserve development was a 3.0-point increase in current year casualty loss costs in Second Quarter 2025 and a 7.5-point increase in Six Months 2025 compared to the same prior-year periods, driven by higher social inflation-related severities primarily in accident years 2022 and 2023 than was observed and responded to throughout 2024. These actions produced full-year 2024 casualty loss costs of 67.0%, compared with 69.2% in Second Quarter 2024 and 64.9% in Six Months 2024. The 2025 ratio reflects the increased losses recognized in the 2024 accident year and elevated loss trend expectations.

We believe that social inflation and elevated loss trends continue to support an elevated near-term pricing environment. In response, we have a heightened focus on prudent underwriting and appropriate pricing. Our renewal pure price increase in this line of business was 11.9% in Second Quarter 2025, in line with 12.0% from last quarter and up from 10.6% for the fourth quarter of 2024. In sectors and jurisdictions where market pricing does not align with our view of rate need, we are taking targeted underwriting actions including (i) revising underwriting guidelines, (ii) tightening coverage offerings, and (iii) reducing writings.

The underwriting expense ratio increased 0.7 points in Second Quarter 2025 and 1.0 points in Six Months 2025 compared to the same prior-year periods, as discussed in the "Total Standard Commercial Lines" section above.

NPW grew 5% in Second Quarter 2025 and 7% in Six Months 2025 compared to the same prior-year periods, primarily benefiting from renewal pure price increases and retention, which was lower this year compared to last.

The combined ratio increased 2.4 points in Second Quarter 2025 and decreased 0.1 in Six Months 2025 compared to the same prior-year periods, and included the following:

We recorded $25 million of unfavorable prior year casualty reserve development in Second Quarter 2025 and Six Months 2025 due to increased severities primarily in accident years 2022 through 2024. The unfavorable prior year casualty reserve development in Second Quarter 2024 and Six Months 2024 was primarily due to increased severities in accident year 2023. Current year casualty loss costs were lower in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods, driven by the mix of property and liability coverages within this line of business.

Non-catastrophe property loss and loss expenses decreased 0.9 points in Second Quarter 2025 and 1.8 points in Six Months 2025 compared to the same prior-year periods, primarily due to (i) the earned impact of higher renewal pure price increases and (ii) period-to-period variability of non-catastrophe property losses.

1 includes Inland Marine.

2 n/a: not applicable.

NPW grew 6% in Second Quarter 2025 and 9% in Six Months 2025 compared to the same prior-year periods, primarily benefiting from renewal pure price increases and exposure growth on renewal policies.

The combined ratio decreased 5.7 points in Second Quarter 2025 and 7.9 points in Six Months 2025 compared to the same prior-year periods and included the following:

While non-catastrophe property losses were slightly higher, net catastrophe losses were lower in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods, as discussed in the "Standard Commercial Lines Segment" section above.

NPW decreased 2% in Second Quarter 2025 and 8% in Six Months 2025 compared to the same prior-year periods, primarily due to decreases in renewal pure price and direct new business.

The combined ratio increased 8.2 points in Second Quarter 2025 and 17.7 points in Six Months 2025 compared to the same prior-year periods and included the following:

There was no prior year casualty reserve development in Second Quarter 2025 and Six Months 2025. The favorable prior year casualty reserve development in Six Months 2024 was primarily due to lower loss severities in accident years 2021 and prior.

The combined ratio was also adversely impacted by an increase in current year casualty loss costs of 7.6 points in Second Quarter 2025 and 8.2 points in Six Months 2025, primarily driven by negative rate changes combined with positive loss trends. These rate level reductions are driven by continued decreases in workers compensation rating bureau loss costs, which form the basis for our filed rating plans, and heavily influence marketplace pricing for this line of business.

Standard Personal Lines Segment

NPW decreased 5% in Second Quarter 2025 and 8% in Six Months 2025 compared to the same prior-year periods, driven primarily by direct new business reductions. New business decreased 41% in Second Quarter 2025 and 50% in Six Months 2025 compared to the same prior-year periods. New policy counts decreased 54% in Second Quarter 2025 and 61% in Six Months 2025 compared to the same prior-year periods, as we focused on growth in states where our rate levels are adequate and narrowed our appetite to mass affluent market business. We have also significantly curtailed production, including restricting new business in certain states, like New Jersey, our biggest market, where we believe our filed rates do not support profitability. The following table depicts our reductions in direct new business and retention for the Second Quarter 2025 and Six Months 2025:

1 Excludes our Flood direct premiums written, which are 100% ceded to the NFIP and do not impact NPW.

We are seeing profitability improvements in this line of business, as we are obtaining positive results from the actions we took to refine our pricing factors and prioritize rate filings to mitigate inflationary impacts. Our more significant rate increases began to take effect early in 2023 and increased in number and magnitude throughout 2024. We expect 2025 rate changes to remain above loss trends but moderate compared to our 2024 rate increases. Through our actions, we achieved renewal pure price increases of 19.0% in Second Quarter 2025 and 21.3% in Six Months 2025. We are continuing to seek improved homeowners profitability by expanding the use of new policy terms and conditions, including (i) coverage for roofs based on a depreciated value considering the age of the roof rather than full replacement cost and (ii) where allowed by law, mandatory wind/hail deductibles in states exposed to severe convective storms.

The change in NPE in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods resulted from the same impacts to NPW described above.

Net catastrophe and non-catastrophe property losses reduced the loss and loss expense ratio by an aggregate 24.6 points in Second Quarter 2025 and 17.3 points in Six Months 2025 compared to the same prior-year periods. Non-catastrophe property loss and loss expense ratios were lower in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods due to (i) the earned impact of higher renewal pure price increases in 2025 and (ii) period-to-period variability of catastrophe and non-catastrophe losses. Net catastrophe losses were lower in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods due to lower frequency and severity of weather-related catastrophe events this year compared to last year.

Details of the prior year casualty reserve development by line of business follow:

Unfavorable prior year casualty reserve development in Six Months 2025 included $5.0 million in personal automobile, primarily driven by increased severities in accident year 2024. In Six Months 2024, prior year casualty reserve development reflected (i) $5.0 million of favorable development in our homeowners line, primarily due to lower loss severities in accident years 2021 and prior, offset by (ii) $5.0 million of unfavorable development on our personal automobile line of business, primarily driven by increased loss severities in accident years 2021 through 2023.

Current year casualty loss costs decreased 2.4 points in Second Quarter 2025 and 2.2 points in Six Months 2025 compared to the same prior-year periods, primarily due to the earned impact of rate increases.

E&S Lines Segment

NPW and NPE growth in Second Quarter 2025 and Six Months 2025 compared to the same prior-year periods included:

NPW and NPE growth in Second Quarter 2025 and Six Months 2025 benefited from (i) both property and casualty exposure growth on renewal policies and (ii) higher rates per exposure.

The loss and loss expense ratio decreased 4.4 points in Second Quarter 2025 compared to Second Quarter 2024, primarily driven by a 2.1-point decrease in catastrophe losses and a 4.2-point decrease in non-catastrophe property losses. The combined ratio impact of these property losses was influenced by (i) the impact of higher rates per exposure and (ii) normal period-to-period variability associated with property losses. Partially offsetting the lower property losses were higher current year loss costs, primarily driven by increased severities due to social inflation.

The loss and loss expense ratio was flat in Six Months 2025 compared to Six Months 2024 as higher net catastrophe losses and current year loss costs were offset by lower non-catastrophe property losses. Our Six Months 2025 catastrophe losses were impacted by the January 2025 California Palisades Fire, which added 1.4 points to our loss and loss expense ratio.

Reinsurance

We successfully completed negotiations of our July 1, 2025 excess of loss treaties that cover Standard Commercial Lines, Standard Personal Lines, and E&S Lines.

We renewed the Casualty Excess of Loss Treaty ("Casualty Treaty") with coverage for $87 million in excess of $3 million retention per loss occurrence, increasing our retention by $1 million. The first layer was modified with an increase in net retention from $2 million to $3 million, and we continue to retain a portion of the layer through a 20% co-participation. The 2025 treaty year deposit premium decreased primarily due to the increased retention and co-participation, partially offset by higher projected subject earned premium due to growth in our book of business.

We also renewed the Property Excess of Loss Treaty ("Property Treaty") with the same retention as the expiring treaty, but with a $30 million increase in limit. The treaty now provides coverage for $95 million in excess of a $5 million retention for losses on a per risk basis. The treaty year deposit premium increased modestly, reflecting higher projected subject earned premium due to growth in our book of business and the increased treaty limit.

The following table summarizes the Casualty Treaty and Property Treaty arrangements covering our Insurance Subsidiaries:

Investments

Our Investments segment's objectives are to maximize the economic value of our investment portfolio by achieving stable, risk-adjusted after-tax net investment income and generate long-term growth in book value per share, considering prevailing market conditions, our enterprise risk tolerances, and other risk implications. We aim to accomplish this by:

•Maximizing the portfolio's overall total return by investing (i) the premiums from our insurance operations, (ii) amounts generated through our capital management strategies, including debt and equity security issuances, and (iii) profits of our business, and

•Maintaining (i) a well-diversified portfolio across issuers, sectors, and asset classes and (ii) a high credit quality fixed income securities portfolio with a duration and maturity profile at an acceptable risk level that provides ample liquidity.

The effective duration of our fixed income and short-term investments was 4.2 years as of June 30, 2025. We monitor and manage the effective duration to maximize yield while managing interest rate risk at an acceptable level. We buy and sell investments with the intent of maximizing investment returns in the current market environment, while balancing capital preservation and ensuring adequate liquidity to support our insurance business.

Our fixed income and short-term investments represented 92% of invested assets at June 30, 2025 and December 31, 2024. These investments had (i) a weighted average credit rating of "A+" as of both June 30, 2025 and December 31, 2024, and (ii) investment grade holdings representing 96% of the total fixed income and short-term investment portfolio at June 30, 2025, and 97% at December 31, 2024.

For further details on the composition, credit quality, and various risks to which our portfolio is subject, see Item 7A. "Quantitative and Qualitative Disclosures About Market Risk." of our 2024 Annual Report.

Invested assets increased $902.3 million at June 30, 2025, compared to December 31, 2024, primarily reflecting (i) net proceeds from the issuance of our 5.9% Senior Notes in the first quarter of 2025, (ii) our active investment of operating cash flows, which were 18% of NPW in Six Months 2025, and (iii) a $137.4 million reduction in pre-tax net unrealized losses in our fixed income and equity securities portfolios from lower interest rates and strong performance of U.S. equities during Six Months 2025. For additional information about our 5.9% Senior Notes, see Note 12. "Indebtedness" in Item 1. "Financial Statements" of this Form 10-Q.

Net Investment Income

Net investment income earned components were as follows:

After-tax net investment income earned increased 18% in Second Quarter 2025 and 15% in Six Months 2025 compared to the same prior-year periods, primarily driven by active portfolio management, operating cash flow deployment, and net proceeds from the issuance of our 5.9% Senior Notes in the first quarter of 2025. For additional information about our 5.9% Senior Notes, see Note 12. "Indebtedness" in Item 1. "Financial Statements" of this Form 10-Q.

Realized and Unrealized Gains and Losses

When evaluating securities for sale, our general philosophy is to reduce our exposure to securities and sectors based on economic evaluations of whether (i) the fundamentals for that security or sector have deteriorated or (ii) the timing is appropriate to trade opportunistically for other securities with better economic-return characteristics. Net realized and unrealized gains and losses for the indicated periods were as follows: