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James River Group Holdings, Inc.

For the period ended Dec 31, 2025. Filed Mar 3, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 3, 2026

JRVR$3.22-14.7%Stored close · as of Nov 10, 2026

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Contents

Report of Independent Registered Public Accounting Firm (PCAOB ID:

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of James River Group Holdings, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of James River Group Holdings, Inc. and subsidiaries (the Company) as of December 31, 2025 and 2024, the related consolidated statements of income (loss) and comprehensive income (loss), changes in shareholders' equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes and financial statement schedules listed in the Index at Item 15(a) (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the 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 issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated March 3, 2026, expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s 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 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 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 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 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 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 financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of the 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 account or disclosures to which it relates.

Valuation of reserves for losses and loss adjustment expenses
Description of the MatterAt December 31, 2025, the incurred but not reported (IBNR) reserves represent a material portion of the Company’s gross reserve for losses and loss adjustment expenses, totaling a balance of $3.099 billion, the majority of which is comprised of the Company’s Excess & Surplus Lines segment. As described in Notes 1 and 8 of the consolidated financial statements, reserves for losses and loss adjustment expenses reflect the estimated ultimate cost of all incurred unpaid claims including estimates of claims incurred but not reported and loss adjustment expenses as of the balance sheet date. The estimate of IBNR relies on key judgments and actuarial assumptions, including initial expected loss ratios, incurred and paid loss development factors, and weighting of actuarial methods by line of business and accident year. The Company's Reserve Committee utilizes the actuarial results, in addition to other information, in determining management’s best estimate of recorded reserves.The subjectivity and uncertainty of estimating the IBNR reserve is caused by various factors including the uncertainty of future frequency and severity of claims, economic and social trends including inflation and litigation, changes in the business and exposure mix, as well as changes in operations. As such, performing audit procedures to evaluate the IBNR reserve required a high degree of auditor judgment and an increased extent of effort, including the involvement of our actuarial specialists.
How We Addressed the Matter in Our AuditWe obtained an understanding, evaluated the design and tested the operating effectiveness of controls related to the valuation of the IBNR reserve. This included testing controls that management has in place over the inputs, methods and assumptions used in estimating the reserve. To test the IBNR reserve, we evaluated the actuarial methods and assumptions used by the Company with the assistance of our actuarial specialists as well as other judgments made by management in determining their best estimate of recorded reserves. We compared the Company’s prior year assumptions of expected development of ultimate loss to actual losses incurred during the current year to identify potential management bias in the determination of the IBNR reserve. We independently projected reserves for selected lines of business using actual historical data and loss development patterns, as well as industry data and other benchmarks where applicable, and compared management’s recorded reserves to these independent estimates.

/s/Ernst & Young LLP

We have served as the Company’s auditor since 2003.

Atlanta, Georgia

March 3, 2026

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