Statement of Changes in Beneficial Ownership (4)

FORM 4 [X] 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
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* PHILLIPS D MARTIN	2. Issuer Name and Ticker or Trading Symbol Montage Resources Corp [ MR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below)
(Last) (First) (Middle) 122 WEST JOHN CARPENTER, FREEWAY, SUITE 300	3. Date of Earliest Transaction (MM/DD/YYYY) 11/13/2020
(Street) IRVING, TX 75039 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/13/2020		D⁽¹⁾		31515	D	⁽²⁾	0	D
Common Stock	11/13/2020		D⁽¹⁾		14051904	D	⁽²⁾	0 ⁽³⁾⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽³⁾⁽⁴⁾⁽⁵⁾

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:
(1)	On November 13, 2020, pursuant to the Agreement and Plan of Merger dated as of August 12, 2020 (the "Merger Agreement"), by and among Montage Resources Corporation (the "Issuer") and Southwestern Energy Company ("Southwestern"), the Issuer merged with and into Southwestern, with Southwestern continuing as the surviving corporation (the "Merger"). Pursuant to the Merger Agreement, each issued and outstanding share of common stock of the Issuer, par value $0.01 per share, outstanding as of immediately prior to the effective time of the Merger was converted into the right to receive 1.8656 shares of Southwestern common stock, par value $0.01 per share ("Southwestern Common Stock").
(2)	On November 12, 2020 (the day prior to the effective time of the Merger), the closing price of one share of Southwestern Common Stock was $2.86.
(3)	These securities were collectively directly held by EnCap Energy Capital Fund VIII, L.P. ("EnCap Fund VIII"), EnCap Energy Capital Fund VIII Co-Investors, L.P. ("EnCap Fund VIII Co-Invest"), EnCap Energy Capital Fund IX, L.P. ("EnCap Fund IX") and TPR Residual Assets, LLC ("TPR Residual").
(4)	(Continued from Footnote 2) TPR Residual is member-managed by EnCap Fund IX. EnCap Partners GP, LLC ("EnCap Partners GP") is the sole general partner of EnCap Partners, LP, which is the managing member of EnCap Investments Holdings, LLC, which is the sole member of EnCap Investments GP, L.L.C., which is the sole general partner of EnCap Investments L.P. EnCap Investments L.P. is the sole general partner of EnCap Equity Fund VIII GP, L.P. ("EnCap Fund VIII GP") and EnCap Equity Fund IX GP, L.P. ("EnCap Fund IX GP"). EnCap Fund VIII GP is the sole general partner of each of EnCap Fund VIII and EnCap Fund VIII Co-Invest. EnCap Fund IX GP is the sole general partner of EnCap Fund IX.
(5)	(Continued from Footnote 3) The Reporting Person is a Managing Partner of EnCap Partners GP and therefore may be deemed to have beneficially owned the reported securities.

Remarks:
This form represents an Exit Form 4 due to the merger of the Issuer with and into Southwestern.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
PHILLIPS D MARTIN 122 WEST JOHN CARPENTER FREEWAY, SUITE 300 IRVING, TX 75039	X