X0306 4 2017-10-19 0001620459 James River Group Holdings, Ltd. JRVR 0001348486 Myron Robert Patrick C/O JAMES RIVER GROUP HOLDINGS, LTD. 90 PITTS BAY ROAD PEMBROKE D0 HM 08 BERMUDA 1 1 0 0 Pres. & COO Common Shares 2017-10-19 4 M 0 87199 21.00 A 294322 D Common Shares 2017-10-19 4 F 0 62550 42.96 D 231772 D Employee Share Option (Right to Buy) 21.00 2017-10-19 4 M 0 87199 0 D 2021-12-11 Common Shares 87199 43600 D The shares disposed of were withheld by James River Group Holdings, Ltd. for payment of the exercise price and tax liability incident to the exercise of the options referenced in Table II. The share option vests in three equal annual installments on December 12 of each of the years 2015 through 2017. /s/ Robert P. Myron 2017-10-21