SELECTIVE INSURANCE GROUP INC

Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors

Selective Insurance Group, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Selective Insurance Group, Inc. and subsidiaries (the Company) as of December 31, 2025 and 2024, the related consolidated statements of income, comprehensive income, stockholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2025, and the related notes and financial statement schedules I to V (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the years in the three-year period ended December 31, 2025, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control– Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 9, 2026 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Estimate of reserve for loss and loss expense

As discussed in Notes 2 and 10 to the consolidated financial statements, the Company estimates the reserve for loss and loss expense (reserves) through an internal reserve review that relies upon methods consistent with actuarial standards of practice supplemented with other internal and external information. The Company develops reserve estimates by line of business and, as experience emerges and other information develops, the reserve estimates are assessed in aggregate and adjusted as necessary. As of December 31, 2025, the Company recorded a liability of $7.23 billion for reserves.

We identified the evaluation of the estimate of reserve for loss and loss expense as a critical audit matter. The process to evaluate the Company’s estimate of reserves involved a high degree of subjective auditor judgment due to the inherent uncertainties in adjusting past experience for current development and anticipating trends for predicting future events. These uncertainties may be affected by a number of considerations, including internal factors, such as changes to underwriting and claim practices, and claim experience; as well as external factors, such as economic conditions, legislative enactments, judicial decisions, and social trends. Evaluating the impact of these factors on the estimate of reserves also required specialized actuarial skills and knowledge.

The following are the primary procedures we performed to address this critical audit matter. With the involvement of actuarial professionals, when appropriate, we evaluated the design and tested the operating effectiveness of certain internal controls related to the Company’s internal reserve review and determination of the Company’s best estimate of recorded reserves. We also involved actuarial professionals with specialized skills and knowledge, who assisted in:

•evaluating the Company’s actuarial methods by comparing them to methods consistent with actuarial standards of practice

•developing an independent estimate of reserves for certain lines of business using methods consistent with actuarial standards of practice

•for certain other lines of business, assessing the Company's internal reserve review by evaluating the assumptions and actuarial methods used

•developing a consolidated range of reserves and comparing it to the Company's recorded reserves and assessing movement of the Company’s recorded reserves within the consolidated range of reserves.

/s/KPMG LLP

We have served as the Company's auditor since 1964.

Short Hills, New Jersey

February 9, 2026