<SEC-DOCUMENT>0001564590-19-009681-index.html : 20190328
<SEC-HEADER>0001564590-19-009681.hdr.sgml : 20190328
<ACCEPTANCE-DATETIME>20190328062045
ACCESSION NUMBER:		0001564590-19-009681
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20190328
DATE AS OF CHANGE:		20190328
EFFECTIVENESS DATE:		20190328

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HANOVER INSURANCE GROUP, INC.
		CENTRAL INDEX KEY:			0000944695
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				043263626
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13754
		FILM NUMBER:		19709885

	BUSINESS ADDRESS:	
		STREET 1:		440 LINCOLN ST
		CITY:			WORCESTER
		STATE:			MA
		ZIP:			01653
		BUSINESS PHONE:		5088551000

	MAIL ADDRESS:	
		STREET 1:		440 LINCOLN ST
		CITY:			WORCESTER
		STATE:			MA
		ZIP:			01653

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLMERICA FINANCIAL CORP
		DATE OF NAME CHANGE:	19950501
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>thg-defa14a_20190514.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: thg-defa14a_20190514.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>gjyoxmsrapfb000001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: gjyoxmsrapfb000001.jpg

</DOCUMENT>
</SEC-DOCUMENT>