SCHEDULE I SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES

12 Months Ended

Dec. 31, 2022

SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]

SCHEDULE I SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES

SCHEDULE I

THE HANOVER INSURANCE GROUP, INC.

SUMMARY OF INVESTMENTS – OTHER THAN INVESTMENTS IN RELATED PARTIES

DECEMBER 31, 2022
(in millions)
Type of investment	Cost (1)		Fair Value		Amount at which shown in the balance sheet (2)
Fixed maturities:
Bonds:
U.S. Government and government agencies and authorities	$	1,590.1	$	1,394.2	$	1,394.2
States, municipalities and political subdivisions		1,239.5		1,076.1		1,076.1
Foreign governments		2.3		2.2		2.2
Public utilities		325.7		296.3		296.3
All other corporate bonds		5,139.0		4,713.0		4,713.0
Total fixed maturities		8,296.6		7,481.8		7,481.8
Equity securities:
Common stocks:
Public utilities		33.3		54.3		54.3
Banks, trusts and insurance companies		46.6		50.2		50.2
Industrial, miscellaneous and all other		74.1		131.0		131.0
Nonredeemable preferred stock		1.0		6.4		6.4
Total equity securities		155.0		241.9		241.9
Mortgage loans on real estate		391.8		357.3		388.6
Other long-term investments		351.1		397.5		397.5
Total investments	$	9,194.5	$	8,478.5	$	8,509.8

(1)Original cost of equity securities and, as to fixed maturities, original cost reduced by repayments and adjusted for amortization of premiums and accretion of discounts.

(2)Mortgage loans on real estate are shown on the balance sheet net of the allowance for credit losses.