X0306 4 2022-03-18 0000944695 HANOVER INSURANCE GROUP, INC. THG 0001275634 FARBER JEFFREY M C/O THE HANOVER INSURANCE GROUP, INC. 440 LINCOLN STREET WORCESTER MA 01653 0 1 0 0 Executive Vice President Common Stock 2022-03-18 4 M 0 50453 70.510 A 93667.464 D Common Stock 2022-03-18 4 F 0 36006 145.250 D 57661.464 D Common Stock 2022-03-18 4 M 0 54569 85.870 A 112230.464 D Common Stock 2022-03-18 4 F 0 42155 145.250 D 70075.464 D Common Stock Option (right to buy) 70.510 2022-03-18 4 M 0 50453.00 0 D 2026-10-03 Common Stock 50453.00 0 D Common Stock Option (right to buy) 85.870 2022-03-18 4 M 0 54569 0 D 2027-02-24 Common stock 54569 0 D Mr. Farber "net exercised" 50,453 options effected pursuant to a pre-established Rule 10b5-1 Trading Plan. The options were granted to Mr. Farber in 2016, and were scheduled to expire ten years after issuance. A total of 36,006 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 14,447 shares to, and held by, Mr. Farber. Mr. Farber "net exercised" 54,569, options effected pursuant to a pre-established Rule 10b5-1 Trading Plan. The options were granted to Mr. Farber in 2017, and were scheduled to expire ten years after issuance. A total of 42,155 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 12,414 shares to, and held by, Mr. Farber. The option, representing the right to purchase a total of 50,453 shares, vested 1/3 on each of 10/03/17, 10/03/18 and 10/03/19. The option, representing the right to purchase a total of 54,569 shares, vested 1/3 on each of 02/24/18, 02/24/19 and 02/24/20. /s/ Matthew R. Frascella pursuant to Confirming Statement 2022-03-21