James River Group Holdings, Ltd.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

or

Commission File Number:001-36777

JAMES RIVER GROUP HOLDINGS, LTD.

(Exact name of registrant as specified in its charter)

Clarendon House,2 Church Street, Hamilton, Pembroke HM11, Bermuda

(Address of principal executive offices)

(Zip Code)

(441)295-1422

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes☐ Nox

Number of shares of the registrant's common shares outstanding at November 3, 2025:45,965,839

James River Group Holdings, Ltd.

Form 10-Q

Index

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q, or Quarterly Report, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements may be identified by the fact that they do not relate strictly to historical or current facts. You may identify forward-looking statements in this Quarterly Report by the use of words such as “anticipates,” “estimates,” “expects,” “intends,” “plans,” “seeks” and “believes,” and similar expressions or future or conditional verbs such as “will,” “should,” “would,” “may” and “could.” These forward-looking statements include, among others, all statements relating to our future financial performance, our business prospects and strategy, anticipated financial position and financial strength ratings, liquidity and capital needs and other similar matters. These forward-looking statements are based on management’s current expectations and assumptions about future events, which are inherently subject to uncertainties, risks and changes in circumstances that are difficult to predict.

Our actual results may differ materially from those expressed in, or implied by, the forward-looking statements included in this Quarterly Report as a result of various factors, many of which are beyond our control, including, among others:

•the inherent uncertainty of estimating reserves and the possibility that incurred losses may be greater than our estimate used to compute loss and loss adjustment expense reserves;

•inaccurate estimates and judgments in our risk management may expose us to greater risks than intended;

•downgrades in the financial strength rating or outlook of our regulated insurance subsidiaries impacting our competitive position and ability to attract and retain insurance business that our subsidiaries write and ultimately our financial condition;

•the outcome of the litigation in connection with the sale of our casualty reinsurance business;

•the potential loss of key members of our management team or key employees, and our ability to attract and retain personnel;

•adverse economic and competitive factors resulting in the sale of fewer policies than expected or an increase in the frequency or severity of claims, or both;

•the impact of a higher than expected inflationary environment on our reserves, loss adjustment expenses, the values of our investments and investment returns, and our compensation expenses;

•exposure to credit risk, interest rate risk and other market risk in our investment portfolio and our reinsurers;

•reliance on a select group of brokers and agents for a significant portion of our business and the impact of our potential failure to maintain such relationships;

•reliance on a select group of customers for a significant portion of our business and the impact of our potential failure to maintain, or decision to terminate, such relationships;

•our ability to obtain insurance and reinsurance coverage at prices and on terms that allow us to transfer risk, adequately protect our Company against financial loss and that supports our growth plans;

•losses resulting from reinsurance counterparties failing to pay us on reinsurance claims, insurance companies with whom we have a fronting arrangement failing to pay us for claims, or a former customer with whom we have an indemnification arrangement failing to perform its reimbursement obligations, and our potential inability to demand or maintain adequate collateral to mitigate such risks;

•the inherent uncertainty of estimating reinsurance recoverable on unpaid losses and the possibility that reinsurance may be less than our estimate of reinsurance recoverable on unpaid losses;

•inadequacy of premiums we charge to compensate us for our losses incurred;

•the effective date and impact of the planned change to the jurisdiction of incorporation of James River Group Holdings, Ltd. from Bermuda to Delaware;

•changes in laws or government regulation, including tax or insurance laws and regulations;

•changes in U.S. tax laws (including associated regulations) and the interpretation of certain provisions applicable to insurance/reinsurance businesses with U.S. and non-U.S. operations, which may be retroactive and could have a significant effect on us including, among other things, by potentially increasing our tax rate, as well as on our shareholders;

•in the event we did not qualify for the insurance company exception to the passive foreign investment company (“PFIC”) rules and were therefore considered a PFIC, there could be material adverse tax consequences to an investor that is subject to U.S. federal income taxation;

•the Company or its foreign subsidiary becoming subject to U.S. federal income taxation;

•a failure of any of the loss limitations or exclusions we utilize in our insurance products to shield us from unanticipated financial losses or legal exposures, or other liabilities;

•losses from catastrophic events, such as natural disasters and terrorist acts, which substantially exceed our expectations and/or exceed the amount of reinsurance we have purchased to protect us from such events;

•potential effects on our business of emerging claim and coverage issues;

•the potential impact of internal or external fraud, operational errors, systems malfunctions or cyber security incidents;

•our ability to manage our growth effectively;

•failure to maintain effective internal controls in accordance with the Sarbanes-Oxley Act of 2002, as amended;

•changes in our financial condition, regulations or other factors that may restrict our subsidiaries’ ability to pay us dividends;

•an adverse result in any litigation or legal proceedings we are or may become subject to; and

•other risks and uncertainties discussed in this Quarterly Report.

Accordingly, you should read this Quarterly Report completely and with the understanding that our actual future results may be materially different from information contained in the forward-looking statements.

Additional information about these risks and uncertainties, as well as others that may cause actual results to differ materially from those in the forward-looking statements, is contained in Part II, Item 1A “Risk Factors” in this Quarterly Report on Form 10-Q, and our filings with the U.S. Securities and Exchange Commission (“SEC”), including our Annual Report on Form 10-K for the year ended December 31, 2024 filed with the SEC on March 4, 2025.

Forward-looking statements speak only as of the date of this Quarterly Report. Except as expressly required under federal securities laws and the rules and regulations of the SEC, we do not have any obligation, and do not undertake, to update any forward-looking statements to reflect events or circumstances arising after the date of this Quarterly Report, whether as a result of new information or future events or otherwise. You should not place undue reliance on the forward-looking statements included in this Quarterly Report or that may be made elsewhere from time to time by us, or on our behalf. All forward-looking statements attributable to us are expressly qualified by these cautionary statements.