0001620459 2025-01-01 2025-12-31 0001620459 2025-06-30 0001620459 2026-02-27 iso4217:USD shares 0001620459 true FY 2025 10-K/A true 2025-12-31 --12-31 false 001-36777 JAMES RIVER GROUP HOLDINGS, INC. DE 98-0585280 1414 Raleigh Road Suite 405 Chapel Hill NC 27517 919 900-1200 Common Stock, par value $0.0002 per share JRVR NASDAQ No No Yes Yes Accelerated Filer false false true false false 230345525 45968584 James River Group Holdings, Inc. (the “Company”, “our”, “us” or “we”) is filing this Amendment No. 1 on Form 10-K/A (this “Form 10-K/A”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2025 (the “Original Form 10-K”) that was filed with the Securities and Exchange Commission (“SEC”) on March 3, 2026 for the sole purpose of including the information required by Part III of Form 10-K. This Part III information was previously omitted from the Original Form 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in Part III to be incorporated in Form 10-K by reference to the Company’s definitive proxy statement if such statement is filed no later than 120 days after the end of our fiscal year. The Company does not intend to file its definitive proxy statement for its 2026 Annual Meeting of Shareholders within 120 days of December 31, 2025, as it intends to hold its 2026 Annual Meeting of Shareholders on a later date within the 2026 fiscal year.As required by Rule 12b-15, in connection with this Form 10-K/A, the Company’s Principal Executive Officer and Principal Financial Officer are providing Rule 13a-14(a) certifications included herein.Except as explicitly set forth herein, this Form 10-K/A does not purport to modify or update the disclosures in, or exhibits to, the Original Form 10-K or to update the Original Form 10-K to reflect events occurring after the date of such filing. true