X0306 4 2022-03-07 0000944695 HANOVER INSURANCE GROUP, INC. THG 0001275634 FARBER JEFFREY M C/O THE HANOVER INSURANCE GROUP, INC. 440 LINCOLN STREET WORCESTER MA 01653 0 1 0 0 Executive Vice President Common Stock 2022-03-07 4 F 0 4816 139.520 D 43214.464 D Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on March 7, 2022. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement. /s/ Matthew R. Frascella pursuant to Confirming Statement 2022-03-09