SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Myron Robert Patrick (Last) (First) (Middle) THE HANOVER INSURANCE GROUP 440 LINCOLN STREET (Street) WORCESTER MA 01653 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 07/14/2009	3. Issuer Name and Ticker or Trading Symbol HANOVER INSURANCE GROUP, INC. [ THG ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Senior Vice President	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	11,754(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	(2)	10/29/2017	Common Stock	22,909	$43.5	D
Stock Option (right to buy)	(3)	02/25/2018	Common Stock	20,000	$45.21	D
Stock Option (right to buy)	(4)	02/23/2019	Common Stock	10,000	$34.19	D

Explanation of Responses:

1. Includes: (a)5,000 restricted stock units that shall, provided Reporting Person remains employed by the Issuer through such date, automatically convert into an equivalent number of shares of common stock on February 25 ,2011;(b) 2,000 restricted stock units that shall, provided Reporting Person remains employed by the Issuer through such date, automatically convert into an equivalent number of shares of common stock on February 23, 2012;(c) 2,754 restricted stock units that shall, provided Reporting Person remains employed by the Issuer through such date, automatically convert into an equivalent number of shares of common stock on March 6,2012; and (d) 2,000 restricted stock units that shall, provided Reporting Person remains employed by the Issuer through such date, automatically convert into an equivalent number of shares of common stock February 23, 2013.

2. Option vests 25% on 10/29/08, 25% on 10/29/09, and 50% on 10/29/10.

3. Option vests 25% on 2/25/09, 25% on 2/25/10, and 50% on 2/25/11.

4. Option vests 50% on 2/23/12, and 50% on 2/23/13.

	Robert P. Myron	07/22/2009
	** 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 5 (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).
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