THG · Hanover Insurance Group, Inc.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

Does not include 2,306 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Does not include 14,454 shares held by the Reporting Person's spouse.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

Does not include 977 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting. The Reporting Person has elected to defer such grant upon vesting pursuant to a deferral agreement.

Does not include 977 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting. The Reporting Person has elected to defer such grant upon vesting pursuant to a deferral agreement.

Does not include 4,829 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such RSUs vest on the third anniversary of the date of grant of the original underlying RSUs.

Grant of restricted stock units ("RSUs") under the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP") in connection with the accrual of dividend equivalent rights associated with RSUs previously granted under the Issuer's 2022 LTIP. Such units vest on the earlier of the one-year anniversary of the date of grant of the original underlying RSUs or the date of the next annual meeting.

The option, representing the right to purchase a total of 16,394 shares, vested 1/3 on each of 2/27/2019, 2/27/2020 and 2/27/2021.

The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $185.38 to $186.28. 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.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 24,766 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercises, resulting in a net issuance of 8,358 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $192.70 to $193.69. 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.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 24,766 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercises, resulting in a net issuance of 8,358 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $193.73 to $194.72. 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.

Does not include 14,454 shares held by the Reporting Person's spouse.

The option, representing the right to purchase a total of 6,262 shares, vested 1/3 on each of 2/26/2022, 2/26/2023 and 2/26/2024.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 24,766 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercises, resulting in a net issuance of 8,358 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

Does not include 14,454 shares held by the Reporting Person's spouse.

The option, representing the right to purchase a total of 27,292 shares, vested 1/3 on each of 2/24/18, 2/24/19 and 2/24/20.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 24,766 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercises, resulting in a net issuance of 8,358 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 24,766 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercises, resulting in a net issuance of 8,358 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 24,766 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercises, resulting in a net issuance of 8,358 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

Does not include 14,454 shares held by the Reporting Person's spouse.

The option, representing the right to purchase a total of 72,078 shares, vested 1/3 on each of 2/27/19, 2/27/20 and 2/27/21.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $197.07 to $198.06. 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.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $196.07 to $197.04. 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.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $198.19 to $199.11. 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.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

Does not include 14,454 shares held by the Reporting Person's spouse.

Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

Does not include 14,454 shares held by the Reporting Person's spouse.

The option, representing the right to purchase a total of 27,292 shares, vested 1/3 on each of 2/24/18, 2/24/19 and 2/24/20.

The option, representing the right to purchase a total of 4,175 shares, vested 1/3 on each of 2/26/2022, 2/26/2023 and 2/26/2024.

Grant of restricted stock units under the Issuer's 2022 Long-Term Incentive Plan. Such units vest on the earlier of the one-year anniversary of the date of grant or the date of the next annual meeting. The Reporting Person has elected to defer such grant upon vesting pursuant to a deferral agreement.

Does not include 977 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

Grant of restricted stock units under the Issuer's 2022 Long-Term Incentive Plan. Such units vest on the earlier of the one-year anniversary of the date of grant or the date of the next annual meeting.

Grant of restricted stock units under the Issuer's 2022 Long-Term Incentive Plan. Such units vest on the earlier of the one-year anniversary of the date of grant or the date of the next annual meeting.

Does not include 2,306 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

Grant of restricted stock units under the Issuer's 2022 Long-Term Incentive Plan. Such units vest on the earlier of the one-year anniversary of the date of grant or the date of the next annual meeting.

Grant of restricted stock units under the Issuer's 2022 Long-Term Incentive Plan. Such units vest on the earlier of the one-year anniversary of the date of grant or the date of the next annual meeting.

Does not include 977 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

Grant of restricted stock units under the Issuer's 2022 Long-Term Incentive Plan. Such units vest on the earlier of the one-year anniversary of the date of grant or the date of the next annual meeting.

Grant of restricted stock units under the Issuer's 2022 Long-Term Incentive Plan. Such units vest on the earlier of the one-year anniversary of the date of grant or the date of the next annual meeting.