Transaction Details

Footnotes

Exercise of options scheduled to expire in June 2027 and resulting sale of shares reported were effected pursuant to a pre-established Rule 10b5-1 Trading Plan adopted on November 27, 2024. | The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $165.60 to $166.59. The Reporting Person undertakes to provide The Hanover Insurance Group, Inc. ("THG"), any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. | The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $166.63 to $167.56. The Reporting Person undertakes to provide THG, any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. | The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $167.61 to $167.78. The Reporting Person undertakes to provide THG, any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. | The option, representing the right to purchase a total of 21,052 shares, vested 1/3 on each of 6/12/2018, 6/12/2019 and 6/12/2020.