SEC Form FWP filed by Hanover Insurance Group Inc

of the principal amount of the Notes to be redeemed and (ii) a make-whole amount calculated at the “treasury rate” (as defined in the preliminary prospectus), plus 20 basis points, less interest accrued to, but excluding the date of redemption, plus, in either case, accrued and unpaid interest thereon to, but excluding, the redemption date.

On or after the Par Call Date, the Issuer may redeem the Notes, in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the Notes being redeemed plus accrued and unpaid interest thereon to, but excluding, the redemption date.

Goldman Sachs & Co. LLC

J.P. Morgan Securities LLC

Morgan Stanley & Co. LLC

PNC Capital Markets LLC

Truist Securities, Inc.

Citizens JMP Securities, LLC

RBC Capital Markets, LLC

Note: A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time.

Note: It is expected that delivery of the Notes will be made against payment therefor on or about August 21, 2025, which is the second business day following the date hereof (such settlement cycle being referred to as ‘‘T+2’’). Pursuant to Rule 15c6-1 under the Securities Exchange Act of 1934, as amended, trades in the secondary market generally are required to settle in one business day unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes prior to their date of delivery may be required, by virtue of the fact that the Notes initially will settle in T+2, to specify an alternative settlement cycle at the time of any such trade to prevent failed settlement. Purchasers of the Notes who wish to trade such Notes earlier than the first business day preceding settlement should consult their own advisors.