HANOVER INSURANCE GROUP, INC. — Director's Dealing 2021

May 5, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: HANOVER INSURANCE GROUP, INC. (THG)
CIK: 0000944695
Period of Report: 2021-05-03

Reporting Person: BARNES WARREN E. (SVP & Princpl. Accntg. Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-03	Common Stock	M	2055	$104.11	Acquired	6142.047	Direct
2021-05-03	Common Stock	S	1127	$139.0446	Disposed	5015.047	Direct
2021-05-03	Common Stock	S	827	$140.2279	Disposed	4188.047	Direct
2021-05-03	Common Stock	S	100	$141.00	Disposed	4088.047	Direct
2021-05-03	Common Stock	S	1	$141.02	Disposed	4087.047	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-03	Common Stock Option (right to buy)	$104.11	M	2055	Disposed	2028-02-27	Common Stock (2055)	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $138.56 to $139.53. The Reporting Person undertakes to provide The Hanover Insurance Group, Inc. ("THG"), any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2: The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $139.835 to $140.67. The Reporting Person undertakes to provide THG, any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3: The option, representing the right to purchase a total of 2,055 shares, vested 1/3 on each of 2/27/19, 2/27/20, and 2/27/21.