X0306 4 2014-02-19 0 0000944695 HANOVER INSURANCE GROUP, INC. THG 0001371448 Greenfield David B C/O THE HANOVER INSURANCE GROUP, INC. 440 LINCOLN STREET WORCESTER MA 01653 0 1 0 0 Executive Vice President Common Stock 2014-02-19 4 A 0 5000 0 A 33512 D Common Stock 2014-02-19 4 A 0 5070 0 A 38582 D Common Stock Option (right to buy) 57.99 2014-02-19 4 A 0 42000 0 A 2024-02-19 Common Stock 42000 42000 D Grant of restricted stock units under the Issuer's 2006 Long-Term Incentive Plan. Such units vest on the third anniversary of the date of grant. On February 28, 2011, the Reporting Person was granted 6,750 (target) performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2006 Long-Term Incentive Plan. The PBRSUs were subject to both performance-based and time-based vesting conditions. On February 19, 2014, the performance condition was certified at 75.1% 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 on this Form 4. The restricted stock unit will vest 50% on each of the third and fourth anniversaries of the original PBRSU grant date. 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 2014-02-21