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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * KRUPA DAVID E   2. Issuer Name and Ticker or Trading Symbol SAFETY INSURANCE GROUP INC [SAFT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP - Claims Operations (Last) (First) (Middle) 20 CUSTOM HOUSE STREET 3. Date of Earliest Transaction (Month/Day/Year) 12/07/2010 (Street) BOSTON, MA 02110 4. If Amendment, Date 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 (City) (State) (Zip) 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 12/07/2010 12/07/2010 M   2,955 A $ 12 93,682 D   Common Stock 12/07/2010 12/07/2010 S   2,955 D $ 47.6321 (1) 90,727 D   Common Stock 12/08/2010 12/08/2010 M   1,473 A $ 12 92,200 D   Common Stock 12/08/2010 12/08/2010 S   1,473 D $ 47.5 90,727 D   Common Stock 12/08/2010 12/08/2010 M   327 A $ 13.03 91,054 D   Common Stock 12/08/2010 12/08/2010 S   327 D $ 47.5 90,727 D

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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 Underlying Securities (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 of Derivative Security: 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

Non-Qualified Stock Options

$ 12

12/07/2010

12/07/2010

M

2,955

11/27/2007(2)

11/27/2012

Common Stock

2,955

$ 0

1,473

D

Non-Qualified Stock Options

$ 12

12/08/2010

12/08/2010

M

1,473

11/27/2007(2)

11/27/2012

Common Stock

1,473

$ 0

0

D

Non-Qualified Stock Options

$ 13.03

12/08/2010

12/08/2010

M

327

03/31/2006(3)

03/31/2013

Common Stock

327

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
KRUPA DAVID E 20 CUSTOM HOUSE STREET BOSTON, MA 02110			VP - Claims Operations

Signatures

/s/David E. Krupa		12/09/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Represents the weighted average sales price of multiple open market same day sales with prices ranging from $47.50 to $47.99 per share. Full information regarding the number of shares sold at each separate price will be provided to the Securities and Exchange Commission, the issuer, or a security holder upon request.
(2)	The reporting person was granted options to purchase 22,140 shares on November 27, 2002. These options vested in five equal 20% annual installments beginning November 27, 2003. Options have been previously exercised and reported with respect to 17,712 shares.
(3)	The reporting person was granted options to purchase 3,270 shares of common stock on March 31, 2003. These options vested in three annual installments of 30% on March 31, 2004, 30% on March 31, 2005 and the remaining 40% on March 31, 2006. Options from this grant have been previously exercised and reported with respect to 2,943 shares.

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