[Form 4] HANOVER INSURANCE GROUP, INC. Insider Trading Activity

Rhea-AI Filing Summary

Hanover Insurance Group President and CEO John C. Roche exercised options for 18,194 shares of common stock at an exercise price of $85.87 per share. The company withheld 12,943 shares to cover the exercise price and taxes, and the remaining 5,251 shares were sold in open-market transactions at prices near $197 under a pre-established Rule 10b5-1 trading plan. Following these transactions, Roche directly holds 141,010.748 shares of Hanover common stock, not including 14,454 shares held by his spouse.

Insider Trade Summary 10b5-1

Net Seller: 5,251 shares ($1,040,031)

Net Sell 7 txns

Insider Roche John C

Role President and CEO

Sold 5,251 shs ($1.04M)

Type	Security	Shares	Price	Value
Sale	Common Stock	375	$196.55	$74K
Sale	Common Stock	2,260	$197.61	$447K
Sale	Common Stock	2,516	$198.65	$500K
Sale	Common Stock	100	$199.23	$20K
Exercise	Common Stock Option (right to buy)	18,194	$0.00	--
Exercise	Common Stock	18,194	$85.87	$1.56M
Tax Withholding	Common Stock	12,943	$194.64	$2.52M

Holdings After Transaction: Common Stock — 145,886.748 shares (Direct, null); Common Stock Option (right to buy) — 9,098 shares (Direct, null)

Footnotes (1)

1. Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan. Does not include 14,454 shares held by the Reporting Person's spouse. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $196.07 to $197.04. 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. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $197.07 to $198.06. 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. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $198.19 to $199.11. 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. The option, representing the right to purchase a total of 27,292 shares, vested 1/3 on each of 2/24/18, 2/24/19 and 2/24/20.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Roche John C

(Last) (First) (Middle)

C/O THE HANOVER INSURANCE GROUP, INC.

440 LINCOLN STREET

(Street)

WORCESTER MASSACHUSETTS 01653

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
HANOVER INSURANCE GROUP, INC. [ THG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/15/2026		M(1)		18,194	A	$85.87	159,204.748(2)	D
Common Stock	05/15/2026		F(1)		12,943	D	$194.64	146,261.748(2)	D
Common Stock	05/18/2026		S(1)		375	D	$196.55(3)	145,886.748(2)	D
Common Stock	05/18/2026		S(1)		2,260	D	$197.61(4)	143,626.748(2)	D
Common Stock	05/18/2026		S(1)		2,516	D	$198.65(5)	141,110.748(2)	D
Common Stock	05/18/2026		S(1)		100	D	$199.23	141,010.748(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Common Stock Option (right to buy)	$85.87	05/15/2026		M			18,194	(6)	02/24/2027	Common Stock	18,194	$0	9,098	D

Explanation of Responses:

1. Pursuant to a pre-established Rule 10b5-1 Trading Plan, adopted on November 19, 2025, the Reporting Person's options were "net exercised". Accordingly, a total of 12,943 shares were withheld by the Company to satisfy the exercise price and taxes associated with the exercise, resulting in a net issuance of 5,251 shares, which were subsequently sold in accordance with the terms of the Rule 10b5-1 Trading Plan.

2. Does not include 14,454 shares held by the Reporting Person's spouse.

3. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $196.07 to $197.04. 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.

4. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $197.07 to $198.06. 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.

5. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $198.19 to $199.11. 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.

6. The option, representing the right to purchase a total of 27,292 shares, vested 1/3 on each of 2/24/18, 2/24/19 and 2/24/20.

	/s/ Lindsay L. Katz pursuant to Confirming Statement	05/19/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)