Form 4 Filing for HANOVER INSURANCE GROUP, INC.

Patricia A. Norton-Gatto, SVP & Principal Accounting Officer of HANOVER INSURANCE GROUP, INC. (THG), acquired 5.658 shares of Common Stock on September 25, 2026, as a result of dividend equivalent rights associated with previously granted RSUs. These RSUs vest on the third anniversary of the original grant date. The acquisition was part of the Issuer's 2022 Long-Term Incentive Plan. Following this transaction, Ms. Norton-Gatto directly owns 2451.721 shares of common stock. The transaction code was "A" and the price per share was 0.0.