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).

1. Name and Address of Reporting Person* HAMMERSCHMIDT JOHN PAUL (Last) (First) (Middle) 2350 N. SAM HOUSTON PARKWAY EAST SUITE 300 (Street) HOUSTON TX 77032 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol SOUTHWESTERN ENERGY CO [ SWN ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 12/13/2005
	4. 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 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	12/13/2005		A		770	A	$0(1)	2,890(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
Stock Options (Right to buy)	$1.625							12/31/2000	12/31/2009	Common Stock	48,000		48,000(3)	D
Stock Options (Right to buy)	$1.75							12/31/1999	12/31/2008	Common Stock	48,000		48,000(4)	D
Stock Options (Right to buy)	$2.4375							12/31/2001	12/31/2010	Common Stock	32,000		32,000(5)	D
Stock Options (Right to buy)	$2.725							12/31/2002	12/31/2011	Common Stock	32,000		32,000(6)	D
Stock Options (Right to buy)	$2.935							12/31/2003	12/31/2012	Common Stock	32,000		32,000(7)	D
Stock Options (Right to buy)	$3.1875							12/31/1998	12/31/2007	Common Stock	48,000		48,000(8)	D
Stock Options (Right to buy)	$6.195							12/31/2004	12/31/2013	Common Stock	32,000		32,000(9)	D
Stock Options (Right to buy)	$12.45							12/09/2005	12/09/2011	Common Stock	6,880		6,880(10)	D
Stock Options (Right to buy)	$35.94	12/13/2005		A		2,750		12/13/2006(11)	12/13/2012	Common Stock	2,750	(1)	2,750	D

Explanation of Responses:

1. Restricted stock and options granted in consideration of services as a director.

2. On May 20, 2005, and again on November 3, 2005, the common stock of Southwestern Energy Company split 2-for-1, resulting in the reporting person's acquisition of 1,590 additional shares of common stock.

3. This option was previously reported as covering 12,000 shares at an exercise price of $6.50 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

4. This option was previously reported as covering 12,000 shares at an exercise price of $7.00 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

5. This option was previously reported as covering 8,000 shares at an exercise price of $9.75 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

6. This option was previously reported as covering 8,000 shares at an exercise price of $10.90 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

7. This option was previously reported as covering 8,000 shares at an exercise price of $11.74 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

8. This option was previously reported as covering 12,000 shares at an exercise price of $6.50 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

9. This option was previously reported as covering 8,000 shares at an exercise price of $24.78 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

10. This option was previously reported as covering 1,720 shares at an exercise price of $49.80 per share, and has been adjusted as a result of a 2-for-1 stock split on May 20, 2005, and a 2-for-1 stock split on November 3, 2005.

11. Option becomes exercisable in three equal annual installments beginning on the first anniversary of the grant date specified in Column 3 or immediately upon a change in control.

	Melissa D. McCarty, Attorney in Fact	12/13/2005
	** 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).
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