X0306 4 2020-02-24 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 2020-02-24 4 A 0 4102 0 A 10222.644 D On June 12, 2017, the Reporting Person was granted 2,735 (target) performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2014 Long-Term Incentive Plan. The PBRSUs were subject to both performance-based and time-based vesting conditions. On February 24, 2020, the performance condition for this award was certified at 150% of the target award, vesting the performance condition of the PBRSUs and converting the award into a restricted stock unit for the number of shares indicated. The restricted stock unit will vest 100% on the third anniversary of the original PBRSU grant date. /s/ Matthew R. Frascella pursuant to Confirming Statement 2020-02-26