144 0001572984 XXXXXXXX LIVE 0000944695 HANOVER INSURANCE GROUP, INC. 001-13754 440 LINCOLN ST WORCESTER MA 01653 5088551000 Lowsley Denise Officer Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

4175 800472.75 34986787 05/14/2026 NYSE Common 05/14/2026 Option Granted 02/26/2021 Issuer N 4175 05/14/2026 Cash N Denise Lowsley

440 Lincoln Street Worcester MA 01653

Common 05/08/2026 1062 200107.35 05/14/2026 /s/ Tyler Johnson, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Denise M. Lowsley