FORM 5 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Form 3 Holdings Reported Form 4 Transactions Reported

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

OMB APPROVAL OMB Number: 3235-0362 Expires: January 31, 2005 Estimated average burden hours per response... 1.0

1. Name and Address of Reporting Person * Bergeron Jr John E 2. Issuer Name and Ticker or Trading Symbol SOUTHWESTERN ENERGY CO [SWN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP and Division Head (Last) (First) (Middle) 10000 ENERGY DRIVE 3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year) 12/31/2017 (Street) SPRING, TX 77389 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Reporting (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 at end of Issuer's Fiscal Year (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Amount (A) or (D) Price Common Stock 04/01/2017   J(1) 145 A $ 8.0352 78,518 D   Common Stock 07/01/2017   J(2) 145 A $ 5.6266 78,663 D   Common Stock 10/01/2017   J(3) 145 A $ 5.6977 78,808 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

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 control number.

SEC 2270 (9-02)

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 at End of Issuer's Fiscal Year (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Bergeron Jr John E 10000 ENERGY DRIVE SPRING, TX 77389	Â	Â	  SVP and Division Head	Â

Signatures

Melissa D. McCarty, Attorney-in-Fact for John E. Bergeron, Jr.		02/14/2018
**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)	On March 21, 2017, the Issuer declared a quarterly dividend of $15.625 per share on its 6.25% Series B Mandatory Convertible Preferred Stock, payable on April 17, 2017, to holders of record on April 1, 2017. The dividend was paid in shares of common stock based on the Volume Weighted Average Price per share over the five consecutive trading day period ending on the second trading day immediately preceding the applicable dividend payment day, multiplied by 97%.
(2)	On June 20, 2017, the Issuer declared a quarterly dividend of $15.625 per share on its 6.25% Series B Mandatory Convertible Preferred Stock, payable on July 17, 2017, to holders of record on July 1, 2017. The dividend was paid in shares of common stock based on the Volume Weighted Average Price per share over the five consecutive trading day period ending on the second trading day immediately preceding the applicable dividend payment day, multiplied by 97%.
(3)	On September 15, 2017, the Issuer declared a quarterly dividend of $15.625 per share on its 6.25% Series B Mandatory Convertible Preferred Stock, payable on October 16, 2017, to holders of record on October 1, 2017. The dividend was paid in shares of common stock based on the Volume Weighted Average Price per share over the five consecutive trading day period ending on the second trading day immediately preceding the applicable dividend payment day, multiplied by 97%.

Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.