Director — Thomas L. Brown: A director is voluntarily choosing not to seek re-election, which constitutes a departure from the board but is not a sudden executive loss or negative event.

Director — Kirstin M. Gould: A director resigned immediately without a stated disagreement, representing a standard board departure rather than a senior executive loss.

Other Events. On August 10, 2026, the Company announced that its Board of Directors declared a cash dividend of $0.01 per share of common stock of the Company to be paid on September 30, 2026 to shareholders of record on September 15, 2026.

and in Exhibit 99.1 furnished herewith shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended or the Exchange Act unless specifically stated by the Company.

Director — Dennis J. Langwell: Mr. Langwell retired as a director and was succeeded by Rajiv Basu.

Other Events. On May 4, 2026, the Company announced that its Board of Directors declared a cash dividend of $0.01 per share of common stock of the Company to be paid on June 30, 2026 to shareholders of record on June 8, 2026.

and in Exhibit 99.1 furnished herewith shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended or the Exchange Act unless specifically stated by the Company.

Director — Dennis J. Langwell: Mr. Langwell does not intend to seek re-election as a director.

Chief Executive Officer — Frank D’Orazio: Compensation for the CEO was increased.

and in Exhibit 99.1 furnished herewith shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended or the Exchange Act unless specifically stated by the Company.

Other Events. On March 2, 2026, the Company announced that its Board of Directors declared a cash dividend of $0.01 per share of common stock of the Company to be paid on March 31, 2026 to shareholders of record on March 13, 2026.

Other Events. On December 2, 2025, the U.S. District Court, Southern District of New York (the “Court”) denied Fleming Intermediate Holdings LLC’s (“Fleming”) motion for reconsideration of the Court’s grant on July 17, 2025 of James River Group Holdings, Inc.’s (the “Company”) motion to dismiss the lawsuit filed on July 15, 2024 by Fleming against the Company and certain of its officers. Fleming’s lawsuit asserted claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, c…

Material Modification to Rights of Security Holders. Effective November 7, 2025, James River Group Holdings, Ltd. (“ James River Bermuda ”) changed its jurisdiction of incorporation from Bermuda to the State of Delaware (the “ Domestication ”) and changed its legal name to James River Group Holdings, Inc. (“ we ,” “ us ,” “ our ” or the “ Company ”) in connection with the Domestication. James River Bermuda discontinued its existence as a Bermuda exempted company as provided under Sections 132…

and in Exhibit 99.1 furnished herewith shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended or the Exchange Act unless specifically stated by the Company.

Other Events. On November 3, 2025, the Company announced that its Board of Directors declared a cash dividend of $0.01 per common share of the Company to be paid on December 31, 2025 to shareholders of record on December 15, 2025.

The filing details amendments to equity plans, not a management change.

President and CEO of Specialty Admitted segment — William K. Bowman: William K. Bowman is retiring and Lisa Binnie has been identified as his successor.

Chief Executive Officer of the Excess & Surplus Lines segment — Richard J. Schmitzer: Mr. Schmitzer is retiring from his role as CEO of the Excess & Surplus Lines segment with a transition period and new title.

Other Events. On August 4, 2025, the Company announced that its Board of Directors declared a cash dividend of $0.01 per common share of the Company to be paid on September 30, 2025 to shareholders of record on September 15, 2025.

and in Exhibit 99.1 furnished herewith shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended or the Exchange Act unless specifically stated by the Company.

Director — Joel D. Cavaness: Mr. Joel D. Cavaness was appointed as a director and to the Compensation & Human Capital Committee.

Other Events. On July 17, 2025, the U.S. District Court, Southern District of New York granted James River Group Holdings, Ltd.’s (the “Company”) motion to dismiss the lawsuit filed on July 15, 2024 by Fleming Intermediate Holdings LLC (“Fleming”) against the Company and certain of its officers, asserting claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, common law fraud, and breaches of contract associated with Fleming’s purchase of JRG Reinsurance Company Ltd., t…

Entry into a Material Definitive Agreement. On June 12, 2025, James River Group Holdings, Ltd. (the “Company”) entered into a Credit Agreement (the “Credit Agreement”) with KeyBank National Association (“KeyBank”) as Administrative Agent and Letter of Credit Issuer, KeyBank and Truist Securities, Inc. as Joint Book Runners and Joint Lead Arrangers, Truist Bank as Syndication Agent, and the lender parties thereto. The Credit Agreement replaced the Company’s previous Third Amended and Restated…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

President and Chief Executive Officer of Excess & Surplus Lines segment — Richard J. Schmitzer: Richard J. Schmitzer is retiring and stepping down from his roles, with Todd Sutherland succeeding him.