HANOVER INSURANCE GROUP, INC.

For the period ended Sep 30, 2026. Filed Oct 29, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Oct 29, 2026

THG$250.21+2.0%Stored close · as of Nov 10, 2026

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Contents

Item 6. EXHIBITS

EX – 10.1+	The Hanover Insurance Group Retirement Savings Plan, as amended.
EX – 31.1	Certification of the Chief Executive Officer, pursuant to 15 U.S.C. 78m, 78o(d), as adopted pursuant to section 302 of the Sarbanes-Oxley Act of 2002.
EX – 31.2	Certification of the Chief Financial Officer, pursuant to 15 U.S.C. 78m, 78o(d), as adopted pursuant to section 302 of the Sarbanes-Oxley Act of 2002.
EX – 32.1	Certification of the Chief Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002.
EX – 32.2	Certification of the Chief Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002.
EX – 101	The following materials from The Hanover Insurance Group, Inc.’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2026 formatted in Inline eXtensible Business Reporting Language (“iXBRL”): (i) Consolidated Statements of Income for the three and nine months ended September 30, 2026 and 2025; (ii) Consolidated Statements of Comprehensive Income (Loss) for the three and nine months ended September 30, 2026 and 2025; (iii) Consolidated Balance Sheets at September 30, 2026 and December 31, 2025; (iv) Consolidated Statements of Shareholders’ Equity for the three and nine months ended September 30, 2026 and 2025; (v) Consolidated Statements of Cash Flows for the nine months ended September 30, 2026 and 2025, and (vi) related notes to these financial statements.
EX – 104	The cover page from The Hanover Insurance Group Inc.’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2026, formatted in iXBRL (embedded within EX – 101).

Management contract or compensatory plan or arrangement.

SIGNAT URES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	The Hanover Insurance Group, Inc.
	Registrant
October 29, 2026	/s/ John C. Roche
Date	John C. Roche
	President, Chief Executive Officer and Director
October 29, 2026	/s/ Jeffrey M. Farber
Date	Jeffrey M. Farber
	Executive Vice President and Chief Financial Officer

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.