Exhibit 31.3

CERTIFICATION

I, Frank N. D’Orazio, certify that:

1.I have reviewed the Amendment No. 1 to the Annual Report on Form 10-K of James River Group Holdings, Ltd.; and

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: April 26, 2024

/s/ Frank N. D’Orazio

Frank N. D’Orazio

Chief Executive Officer

(Principal Executive Officer)