X0306 4 2022-02-28 0000944695 HANOVER INSURANCE GROUP, INC. THG 0001709075 Salvatore Bryan J C/O THE HANOVER INSURANCE GROUP, INC. 440 LINCOLN STREET WORCESTER MA 01653 0 1 0 0 Executive Vice President Common Stock 2022-02-28 4 A 0 1838 0 A 15765.807 D Common Stock 2022-02-28 4 A 0 1030 0 A 16795.807 D Common Stock 2022-02-28 4 A 0 1434 0 A 18229.807 D Common Stock Option (right to buy) 139.51 2022-02-28 4 A 0 7008 0 A 2032-02-28 Common Stock 7008 7008 D On March 5, 2019, the Reporting Person was granted 1,152 (target) performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2014 Long-Term Incentive Plan. These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition and also provided for the accumulation of dividend equivalent rights. On February 28, 2022, the performance condition for this award was certified at 146.4% of the target award (as adjusted for accumulated dividend equivalent rights) for the number of shares indicated. This award remains subject to the time-based vesting condition and is scheduled to vest on March 7, 2022. On March 5, 2019, the Reporting Person was granted 1,031 (target) PBRSUs pursuant to the Issuer's 2014 Long-Term Incentive Plan. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition and also provided for the accumulation of dividend equivalent rights. On February 28, 2022, the performance condition for this award was certified at 91.67% of the target award (as adjusted for accumulated dividend equivalent rights) for the number of shares indicated. This award remains subject to the time-based vesting condition and is scheduled to vest on March 7, 2022. Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan. Such units vest on the third anniversary of the date of grant. Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date. /s/ Matthew R. Frascella pursuant to Confirming Statement 2022-03-02