Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On July 28, 2026, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended June 30, 2026. The release is furnished as Exhibit 99.1 hereto. Additionally, on July…

Principal Accounting Officer — Patricia A. Norton-Gatto: Patricia A. Norton-Gatto was promoted to Principal Accounting Officer.

Other Events. On May 13, 2026, the Board terminated the Company’s existing share repurchase program, initially approved in December 2018, and adopted a new share repurchase program authorizing an aggregate of $700 million in share repurchases (the “Share Repurchase Program”). Repurchases under the Share Repurchase Program may be made at the Company’s discretion from time to time using open market purchases, privately negotiated transactions, accelerated repurchase programs or other transactio…

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On April 29, 2026, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended March 31, 2026. The release is furnished as Exhibit 99.1 hereto. Additionally, on Apr…

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On February 3, 2026, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended December 31, 2025. The release is furnished as Exhibit 99.1 hereto. Additionally, o…

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On October 29, 2025, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended September 30, 2025. The release is furnished as Exhibit 99.1 hereto. Additionally,…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information set forth below in

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On July 30, 2025, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended June 30, 2025. The release is furnished as Exhibit 99.1 hereto. Additionally, on July…

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On April 30, 2025, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended March 31, 2025. The release is furnished as Exhibit 99.1 hereto. Additionally, on Apr…

COO — Richard W. Lavey: The filing announces the internal promotion of a long-tenured executive to a newly created Chief Operating Officer role, which is a positive signal of organizational growth rather than a departure.

Principal Accounting Officer — Warren E. Barnes: The Principal Accounting Officer is retiring with a named internal successor (the CFO) assuming the role, indicating an orderly succession rather than a sudden loss of executive talent.

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On February 4, 2025, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended December 31, 2024. The release is furnished as Exhibit 99.1 hereto. Additionally, o…

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On October 30, 2024, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended September 30, 2024. The release is furnished as Exhibit 99.1 hereto. Additionally,…

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On July 31, 2024, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended June 30, 2024. The release is furnished as Exhibit 99.1 hereto. Additionally, on July…

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On July 18, 2024, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its catastrophe loss estimates and preliminary results for the quarter ended June 30, 2024. The release is furnished as Exhibit 99…

Material Modification to Rights of Security Holders. The disclosure set forth under

Results of Operations and Financial Condition. Such information, including the exhibits attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. On May 1, 2024, The Hanover Insurance Group, Inc. (the Company) issued a press release announcing its financial results for the quarter ended March 31, 2024. The release is furnished as Exhibit 99.1 hereto. Additionally, on May 1,…