THG

SEC source: 0001193125-26-134534 · ownership.xml · nonDerivative · entry 1

Salvatore Bryan J · CIK 0001709075 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,069.276

F1 · kind: 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.

SEC source: 0001193125-26-086057 · ownership.xml · nonDerivative · entry 1

Carlin Jane D · CIK 0001558946 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,423

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $180.79 to $181.02. 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.

F2 · balance_after: Does not include 2,306 shares held indirectly in a Rabbi Trust pursuant to deferral agreements.

SEC source: 0001193125-26-086053 · ownership.xml · nonDerivative · entry 1

Kerrigan Dennis Francis · CIK 0001799888 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,968.723

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

SEC source: 0001193125-26-086052 · ownership.xml · nonDerivative · entry 1

FARBER JEFFREY M · CIK 0001275634 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,716.485

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

SEC source: 0001193125-26-086051 · ownership.xml · nonDerivative · entry 1

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,382.74

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

SEC source: 0001193125-26-086048 · ownership.xml · nonDerivative · entry 1

Salvatore Bryan J · CIK 0001709075 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,038.599

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

SEC source: 0001193125-26-086045 · ownership.xml · nonDerivative · entry 1

Roche John C · CIK 0001428157 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,858.174

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

F2 · balance_after: Does not include 14,454 shares held by the Reporting Person's spouse.

SEC source: 0001193125-26-086044 · ownership.xml · nonDerivative · entry 1

LOVELY DAVID JOHN · CIK 0001958694 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,794.675

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

SEC source: 0001193125-26-086041 · ownership.xml · nonDerivative · entry 1

Lowsley Denise · CIK 0001572984 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,932.24

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

SEC source: 0001193125-26-086040 · ownership.xml · nonDerivative · entry 1

Lee Willard T · CIK 0001843620 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,968.851

F1 · kind: Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer and vested on February 27, 2026. In connection with vesting, any fractional shares were rounded up to the next whole share in accordance with the terms of the award agreement.

SEC source: 0001193125-26-077044 · ownership.xml · derivative · entry 4

FARBER JEFFREY M · CIK 0001275634 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,436

Underlying: Common Stock · 14,436 shares

Expires 2036-02-24

F4 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-077044 · ownership.xml · nonDerivative · entry 3

FARBER JEFFREY M · CIK 0001275634 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,223.205

F3 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

SEC source: 0001193125-26-077044 · ownership.xml · nonDerivative · entry 2

FARBER JEFFREY M · CIK 0001275634 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,198.205

F2 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-077044 · ownership.xml · nonDerivative · entry 1

FARBER JEFFREY M · CIK 0001275634 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,948.205

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-077038 · ownership.xml · derivative · entry 4

Kerrigan Dennis Francis · CIK 0001799888 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,328

Underlying: Common Stock · 5,328 shares

Expires 2036-02-24

F4 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-077038 · ownership.xml · nonDerivative · entry 3

Kerrigan Dennis Francis · CIK 0001799888 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,719.585

F3 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

SEC source: 0001193125-26-077038 · ownership.xml · nonDerivative · entry 2

Kerrigan Dennis Francis · CIK 0001799888 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,602.585

F2 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-077038 · ownership.xml · nonDerivative · entry 1

Kerrigan Dennis Francis · CIK 0001799888 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,487.585

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-077008 · ownership.xml · derivative · entry 4

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,968

Underlying: Common Stock · 9,968 shares

Expires 2036-02-24

F4 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-077008 · ownership.xml · nonDerivative · entry 3

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,601.879

F3 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

SEC source: 0001193125-26-077008 · ownership.xml · nonDerivative · entry 2

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,512.879

F2 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-077008 · ownership.xml · nonDerivative · entry 1

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,655.879

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-077001 · ownership.xml · derivative · entry 4

LOVELY DAVID JOHN · CIK 0001958694 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,781

Underlying: Common Stock · 3,781 shares

Expires 2036-02-24

F4 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-077001 · ownership.xml · nonDerivative · entry 3

LOVELY DAVID JOHN · CIK 0001958694 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,862.372

F3 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

SEC source: 0001193125-26-077001 · ownership.xml · nonDerivative · entry 2

LOVELY DAVID JOHN · CIK 0001958694 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,069.372

F2 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-077001 · ownership.xml · nonDerivative · entry 1

LOVELY DAVID JOHN · CIK 0001958694 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,371.372

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-076977 · ownership.xml · derivative · entry 4

Roche John C · CIK 0001428157 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,025

Underlying: Common Stock · 45,025 shares

Expires 2036-02-24

F5 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-076977 · ownership.xml · nonDerivative · entry 3

Roche John C · CIK 0001428157 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,078.174

F4 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

F2 · balance_after: Does not include 14,454 shares held by the Reporting Person's spouse.

SEC source: 0001193125-26-076977 · ownership.xml · nonDerivative · entry 2

Roche John C · CIK 0001428157 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,643.174

F3 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

F2 · balance_after: Does not include 14,454 shares held by the Reporting Person's spouse.

SEC source: 0001193125-26-076977 · ownership.xml · nonDerivative · entry 1

Roche John C · CIK 0001428157 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,103.174

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

F2 · balance_after: Does not include 14,454 shares held by the Reporting Person's spouse.

SEC source: 0001193125-26-076992 · ownership.xml · derivative · entry 4

Lowsley Denise · CIK 0001572984 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,094

Underlying: Common Stock · 3,094 shares

Expires 2036-02-24

F5 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-076992 · ownership.xml · nonDerivative · entry 3

Lowsley Denise · CIK 0001572984 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,138.34

F4 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

F2 · balance_after: Includes 68 shares acquired pursuant to The Hanover Insurance Group Inc.'s 2023 Employee Stock Purchase Plan on December 31, 2025.

SEC source: 0001193125-26-076992 · ownership.xml · nonDerivative · entry 2

Lowsley Denise · CIK 0001572984 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,489.34

F3 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

F2 · balance_after: Includes 68 shares acquired pursuant to The Hanover Insurance Group Inc.'s 2023 Employee Stock Purchase Plan on December 31, 2025.

SEC source: 0001193125-26-076992 · ownership.xml · nonDerivative · entry 1

Lowsley Denise · CIK 0001572984 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,745.34

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

F2 · balance_after: Includes 68 shares acquired pursuant to The Hanover Insurance Group Inc.'s 2023 Employee Stock Purchase Plan on December 31, 2025.

SEC source: 0001193125-26-076975 · ownership.xml · derivative · entry 4

Salvatore Bryan J · CIK 0001709075 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,937

Underlying: Common Stock · 8,937 shares

Expires 2036-02-24

F4 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-076975 · ownership.xml · nonDerivative · entry 3

Salvatore Bryan J · CIK 0001709075 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,844.879

F3 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

SEC source: 0001193125-26-076975 · ownership.xml · nonDerivative · entry 2

Salvatore Bryan J · CIK 0001709075 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,971.879

F2 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-076975 · ownership.xml · nonDerivative · entry 1

Salvatore Bryan J · CIK 0001709075 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,299.879

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-076971 · ownership.xml · derivative · entry 4

Lee Willard T · CIK 0001843620 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,781

Underlying: Common Stock · 3,781 shares

Expires 2036-02-24

F4 · derivative.exercise_date: Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date.

SEC source: 0001193125-26-076971 · ownership.xml · nonDerivative · entry 3

Lee Willard T · CIK 0001843620 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,182.951

F3 · kind: Grant of restricted stock units under the Issuer's 2022 LTIP. Such units vest on the third anniversary of the date of grant.

SEC source: 0001193125-26-076971 · ownership.xml · nonDerivative · entry 2

Lee Willard T · CIK 0001843620 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,389.951

F2 · kind: On February 27, 2023, the Reporting Person was granted PBRSUs pursuant to the Issuer's 2022 LTIP. These PBRSUs were subject to a performance-based vesting condition related to three-year relative total shareholder return and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 100% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-076971 · ownership.xml · nonDerivative · entry 1

Lee Willard T · CIK 0001843620 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,645.951

F1 · kind: On February 27, 2023, the Reporting Person was granted performance-based restricted stock units ("PBRSUs") pursuant to the Issuer's 2022 Long-Term Incentive Plan ("2022 LTIP"). These PBRSUs were subject to a performance-based vesting condition related to three-year average adjusted return on equity and a time-based vesting condition, and also provided for the accumulation of dividend equivalent rights. On February 24, 2026, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights). This award remains subject to the time-based vesting condition and will vest on February 27, 2026.

SEC source: 0001193125-26-041205 · ownership.xml · derivative · entry 9

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17,420 shares

Expires 2026-02-23

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Exercise and subsequent sale of options scheduled to expire in February 2026.

F9 · derivative.exercise_date: The option, representing the right to purchase a total of 17,420 shares, vested 1/3 on each of 2/23/2017, 2/23/2018 and 2/23/2019.

SEC source: 0001193125-26-041205 · ownership.xml · nonDerivative · entry 8

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,773.879

F8 · kind: Charitable gift of shares.

SEC source: 0001193125-26-041205 · ownership.xml · nonDerivative · entry 7

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,173.879

F7 · price: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $179.63 to $179.79. 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.

SEC source: 0001193125-26-041205 · ownership.xml · nonDerivative · entry 6

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,451.879

F6 · price: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $178.44 to $179.43. 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.

SEC source: 0001193125-26-041205 · ownership.xml · nonDerivative · entry 5

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,062.879

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $177.42 to $178.41. 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.

SEC source: 0001193125-26-041205 · ownership.xml · nonDerivative · entry 4

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,173.879

F1 · kind: Exercise and subsequent sale of options scheduled to expire in February 2026.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $179.44 to $180.18. 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.

SEC source: 0001193125-26-041205 · ownership.xml · nonDerivative · entry 3

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,127.879

F1 · kind: Exercise and subsequent sale of options scheduled to expire in February 2026.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $178.44 to $179.37. 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.

SEC source: 0001193125-26-041205 · ownership.xml · nonDerivative · entry 2

LAVEY RICHARD W · CIK 0001275977 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,254.879

F1 · kind: Exercise and subsequent sale of options scheduled to expire in February 2026.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $177.42 to $178.41. 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.