| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 09/29/2023 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 15.352 | $0.00 | $0 | | 09/29/2023 |
| 06/30/2023 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 14.967 | $0.00 | $0 | | 06/30/2023 |
| 03/31/2023 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 13.082 | $0.00 | $0 | | 03/31/2023 |
| 03/01/2023 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 862 | $138.51 | $119.4k | | 03/01/2023 |
| 02/28/2023 | HANOVER INSURANCE GROUP, INC. | THG | Payment of Exercise | Common Stock | 376 | $139.48 | $52.4k | | 02/27/2023 |
| 02/27/2023 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock Option (right to buy) | 1.5k | $140.01 | $205.4k | | 02/27/2023 |
| 02/27/2023 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 257 | $0.00 | $0 | | 02/27/2023 |
| 02/27/2023 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 189 | $0.00 | $0 | | 02/27/2023 |
| 02/27/2023 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 661 | $0.00 | $0 | | 02/27/2023 |
| 12/31/2022 | HANOVER INSURANCE GROUP, INC. | THG | Payment of Exercise | Common Stock | 20 | $135.13 | $2.7k | | 12/30/2022 |
| 12/30/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 13.264 | $0.00 | $0 | | 12/30/2022 |
| 09/30/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 12.876 | $0.00 | $0 | | 09/30/2022 |
| 06/24/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 11.092 | $0.00 | $0 | | 06/24/2022 |
| 03/25/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 10.904 | $0.00 | $0 | | 03/25/2022 |
| 03/08/2022 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 649 | $139.74 | $90.7k | | 03/07/2022 |
| 03/07/2022 | HANOVER INSURANCE GROUP, INC. | THG | Payment of Exercise | Common Stock | 249 | $139.52 | $34.7k | | 03/07/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 1.2k | $140.00 | $164.4k | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 2k | $140.00 | $282.7k | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 696 | $140.00 | $97.4k | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 209 | $0.00 | $0 | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 118 | $0.00 | $0 | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 628 | $0.00 | $0 | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Exercise | Common Stock Option (right to buy) | 1.2k | $117.22 | $137.6k | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Exercise | Common Stock Option (right to buy) | 2k | $118.54 | $239.3k | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Exercise | Common Stock Option (right to buy) | 696 | $115.35 | $80.3k | | 02/28/2022 |
| 02/28/2022 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock Option (right to buy) | 1.5k | $139.51 | $213.9k | | 02/28/2022 |
| 12/30/2021 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 12.004 | $0.00 | $0 | | 12/30/2021 |
| 09/24/2021 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 11.031 | $0.00 | $0 | | 09/24/2021 |
| 06/25/2021 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 10.574 | $0.00 | $0 | | 06/25/2021 |
| 05/03/2021 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 1.1k | $139.04 | $156.7k | | 05/03/2021 |
| 05/03/2021 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 827 | $140.23 | $116k | | 05/03/2021 |
| 05/03/2021 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 100 | $141.00 | $14.1k | | 05/03/2021 |
| 05/03/2021 | HANOVER INSURANCE GROUP, INC. | THG | Sale | Common Stock | 1 | $141.02 | $141 | | 05/03/2021 |
| 05/03/2021 | HANOVER INSURANCE GROUP, INC. | THG | Exercise | Common Stock Option (right to buy) | 2.1k | $104.11 | $213.9k | | 05/03/2021 |
| 03/26/2021 | HANOVER INSURANCE GROUP, INC. | THG | Grant | Common Stock | 11.083 | $0.00 | $0 | | 03/26/2021 |
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