HANOVER INSURANCE GROUP, INC.

Consolidated net income for the three months ended September 30, 2025 was $178.7 million, compared to $102.1 million for the three months ended September 30, 2024, an improvement of $76.6 million. This increase was due to higher after-tax operating income of $74.3 million. Operating income before interest expense and income taxes was $247.7 million for the three months ended September 30, 2025, compared to $150.6 million for the three months ended September 30, 2024, an increase of $97.1 million. This increase was primarily due to lower catastrophe losses, higher net investment income and improvements in current accident year underwriting results in our Personal Lines segment. These improvements were partially offset by higher current accident year losses in our Core Commercial segment.

Consolidated net income for the nine months ended September 30, 2025 was $464.0 million, compared to $258.1 million for the nine months ended September 30, 2024, an improvement of $205.9 million. This increase was due to higher after-tax operating income of $194.8 million. Operating income before interest expense and income taxes was $644.0 million for the nine months ended September 30, 2025, compared to $395.7 million for the nine months ended September 30, 2024, an increase of $248.3 million. This increase was primarily due to lower catastrophe losses, improvements in current accident year underwriting results primarily in our Personal Lines segment, as well as higher net investment income and earned premium growth. These improvements were partially offset by higher current accident year losses in our Core Commercial segment.

The following table reflects operating income before interest expense and income taxes for each reporting segment and a reconciliation to consolidated net income from operating income before interest expense and income taxes (a non-GAAP measure).

Non-GAAP Financial Measures

In addition to consolidated net income, discussed above, we assess our financial performance based upon pre-tax “operating income,” and we assess the operating performance of each of our four reporting segments based upon the pre-tax operating income generated by each segment. As reflected in the table above, operating income before interest expense and income taxes excludes interest expense on debt and certain other items, which we believe are not indicative of our core operations, such as net realized and unrealized investment gains and losses. Such gains and losses are excluded since they are determined by interest rates, financial markets and the timing of sales. Also, operating income before interest expense and income taxes excludes net gains and losses on disposals of businesses, gains and losses related to the repayment of debt, discontinued operations, costs to acquire businesses, restructuring costs, the cumulative effect of accounting changes and certain other items. Although the items excluded from operating income before interest expense and income taxes are important components in understanding and assessing our overall financial performance, we believe a discussion of operating income before interest expense and income taxes enhances an investor’s understanding of our results of operations by highlighting net income attributable to the core operations of the business. However, operating income before interest expense and income taxes, which is a non-GAAP measure, should not be construed as a substitute for income before income taxes or income from continuing operations, and operating income should not be construed as a substitute for net income.

Catastrophe losses and prior years’ reserve development are significant components in understanding and assessing the financial performance of our business. Management reviews and evaluates catastrophes and prior years’ reserve development separately from the other components of earnings. References to “current accident year underwriting results” exclude prior accident year reserve development and are also presented “excluding catastrophes.” Prior years’ reserve development and catastrophes are not predictable as to timing or the amount that will affect the results of our operations and have an effect on each year’s operating and net income. Management believes that providing certain financial metrics and trends excluding the effects of catastrophes and prior years’ reserve development helps investors to understand the variability in periodic earnings and to evaluate the underlying performance of our operations. Discussion of catastrophe losses in this Management’s Discussion and Analysis includes development on prior years’ catastrophe reserves and, unless otherwise indicated, such development is excluded from discussions of prior year loss and loss adjustment expenses (“LAE”) reserve development.