UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 11)*

Montage Resources Corporation

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

27890G 100

(CUSIP Number)

Douglas E. Swanson, Jr.

EnCap Investments L.P.

1100 Louisiana Street, Suite 4900

Houston, Texas 77002

(713) 659-6100

Copies to:

W. Matthew Strock

Vinson & Elkins L.L.P.

1001 Fannin, Suite 2500

Houston, TX 77002

(713) 758-2222

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

November 13, 2020

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

*	The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 27890G 100


1	Name of Reporting Person ENCAP ENERGY CAPITAL FUND VIII, L.P.
2	Check the Appropriate Box if a Member of a Group (A): ☐ (B): ☐
3	SEC Use Only
4	Source of Funds OO
5	Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(D) or 2(E) ☐
6	Citizenship or Place of Organization Texas
Number of Shares Beneficially Owned by Each Reporting Person with		7	Sole Voting Power -0-
		8	Shared Voting Power -0-
		9	Sole Dispositive Power -0-
		10	Shared Dispositive Power -0-
11	Aggregate Amount Beneficially Owned by Each Reporting Person -0-
12	Check if the Aggregate Amount in Row (11) Excludes Certain Shares ☐
13	Percent of Class Represented by Amount in Row (11) -0-
14	Type of Reporting Person PN


CUSIP No. 27890G 100


1	Name of Reporting Person ENCAP ENERGY CAPITAL FUND VIII CO-INVESTORS, L.P.
2	Check the Appropriate Box if a Member of a Group (A): ☐ (B): ☐
3	SEC Use Only
4	Source of Funds OO
5	Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(D) or 2(E) ☐
6	Citizenship or Place of Organization Texas
Number of Shares Beneficially Owned by Each Reporting Person with		7	Sole Voting Power -0-
		8	Shared Voting Power -0-
		9	Sole Dispositive Power -0-
		10	Shared Dispositive Power -0-
11	Aggregate Amount Beneficially Owned by Each Reporting Person -0-
12	Check if the Aggregate Amount in Row (11) Excludes Certain Shares ☐
13	Percent of Class Represented by Amount in Row (11) -0-
14	Type of Reporting Person PN


CUSIP No. 27890G 100


1	Name of Reporting Person ENCAP ENERGY CAPITAL FUND IX, L.P.
2	Check the Appropriate Box if a Member of a Group (A): ☐ (B): ☐
3	SEC Use Only
4	Source of Funds OO
5	Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(D) or 2(E) ☐
6	Citizenship or Place of Organization Texas
Number of Shares Beneficially Owned by Each Reporting Person with		7	Sole Voting Power -0-
		8	Shared Voting Power -0-
		9	Sole Dispositive Power -0-
		10	Shared Dispositive Power -0-
11	Aggregate Amount Beneficially Owned by Each Reporting Person -0-
12	Check if the Aggregate Amount in Row (11) Excludes Certain Shares ☐
13	Percent of Class Represented by Amount in Row (11) -0-
14	Type of Reporting Person PN


CUSIP No. 27890G 100


1	Name of Reporting Person TPR RESIDUAL ASSETS, LLC
2	Check the Appropriate Box if a Member of a Group (A): ☐ (B): ☐
3	SEC Use Only
4	Source of Funds OO
5	Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(D) or 2(E) ☐
6	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person with		7	Sole Voting Power -0-
		8	Shared Voting Power -0-
		9	Sole Dispositive Power -0-
		10	Shared Dispositive Power -0-
11	Aggregate Amount Beneficially Owned by Each Reporting Person -0-
12	Check if the Aggregate Amount in Row (11) Excludes Certain Shares ☐
13	Percent of Class Represented by Amount in Row (11) -0-
14	Type of Reporting Person OO


CUSIP No. 27890G 100


1	Name of Reporting Person ENCAP PARTNERS GP, LLC
2	Check the Appropriate Box if a Member of a Group (A): ☐ (B): ☐
3	SEC Use Only
4	Source of Funds OO
5	Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(D) or 2(E) ☐
6	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person with		7	Sole Voting Power -0-
		8	Shared Voting Power -0-
		9	Sole Dispositive Power -0-
		10	Shared Dispositive Power -0-
11	Aggregate Amount Beneficially Owned by Each Reporting Person -0-
12	Check if the Aggregate Amount in Row (11) Excludes Certain Shares ☐
13	Percent of Class Represented by Amount in Row (11) -0-
14	Type of Reporting Person OO

Explanatory Note

This Amendment No. 11 (this “Amendment”) amends the information provided in the Schedule 13D (the “Original Schedule 13D”) filed with the SEC by Eclipse Resources Holdings, L.P. (“Eclipse Holdings”), 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”), David B. Miller, D. Martin Phillips, Gary R. Petersen and Robert L. Zorich on July 7, 2014, as amended by that certain Amendment No. 1 filed on January 13, 2015, that certain Amendment No. 2 filed on February 2, 2015, that certain Amendment No. 3 filed on July 15, 2016, that certain Amendment No. 4 filed on September 30, 2016, that certain Amendment No. 5 filed on January 18, 2018, that certain Amendment No. 6 filed on September 2, 2018, that certain Amendment No. 7 filed on February 6, 2019, that certain Amendment No. 8 filed on March 1, 2019, that certain Amendment No. 9 filed on October 30, 2019, and that certain Amendment No. 10 filed on August 12, 2020. This Amendment amends the Original Schedule 13D on behalf of the undersigned to furnish the information set forth herein and relates to the beneficial ownership of the shares of common stock, $0.01 par value per share (“Common Stock”), of Montage Resources Corporation (formerly known as Eclipse Resources Corporation), a Delaware corporation (the “Issuer”). Except as otherwise specified in this Amendment, all items left blank remain unchanged in all material respects and any items that are reported are deemed to amend and restate the corresponding items in the Original Schedule 13D in their entirety.

This Amendment is being filed on behalf of the reporting persons identified on the cover pages of this Amendment. Capitalized terms used in this Amendment and not otherwise defined shall have the same meanings ascribed to them in the Original Schedule 13D. This Amendment constitutes an exit filing for the Reporting Persons in respect of Common Stock previously reported as beneficially owned by the Reporting Persons.

Item 2.

Purpose of the Transaction

Item 2 of the Original Schedule 13D is amended to include the following after the final paragraph:

As a result of the Merger, as discussed further below in Item 4, the separate existence of the Issuer has ceased and Southwestern is the surviving entity in the Merger.

Item 4.

Purpose of the Transaction

Item 4 of the Original Schedule 13D is amended to include the following after the final paragraph:

Completion of Southwestern Merger

On November 13, 2020, the transactions contemplated by the Merger Agreement were consummated. Pursuant to the terms of the Merger Agreement, each issued and outstanding share of Common Stock was converted into the right to receive 1.8656 shares of common stock, $0.01 par value per share, of Southwestern. As a result of the Merger, the Support Agreement was terminated in accordance with the terms of the Support Agreement upon the Effective Time.

As a result of the foregoing and as of the Effective Time, EnCap Fund VIII, EnCap Fund VIII Co-Invest, EnCap Fund IX, TPR Residual Assets, LLC and EnCap Partners GP, LLC no longer beneficially own any shares of Common Stock.

Item 5.

Interest in Securities of the Issuer

Item 5 of the Original Schedule 13D is amended to include the following after the final paragraph:

The information set forth in Item 2 of this Amendment is incorporated by reference herein. As a result of the Merger, the Reporting Persons no longer own any shares of Common Stock. Consequently, this Amendment constitutes an exit filing for the Reporting Persons.

Item 6.

Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer.

Item 6 of the Original Schedule 13D is amended to include the following after the final paragraph:

The information set forth in Item 4 of this Amendment is incorporated by reference herein.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: November 13, 2020


EnCap Energy Capital Fund VIII, L.P.

By:		EnCap Equity Fund VIII GP, L.P.,
		its general partner

By:		EnCap Investments L.P.,
		its general partner

By:		EnCap Investments GP, L.L.C.,
		its general partner

By:		/s/ Douglas E. Swanson, Jr.
Name:		Douglas E. Swanson, Jr.
Title:		Managing Director

EnCap Energy Capital Fund VIII Co-Investors, L.P.

By:		EnCap Equity Fund VIII GP, L.P.,
		its general partner

By:		EnCap Investments L.P.,
		its general partner

By:		EnCap Investments GP, L.L.C.,
		its general partner

By:		/s/ Douglas E. Swanson, Jr.
Name:		Douglas E. Swanson, Jr.
Title:		Managing Director

EnCap Energy Capital Fund IX, L.P.

By:		EnCap Equity Fund IX GP, L.P.,
		its general partner

By:		EnCap Investments L.P.,
		its general partner

By:		EnCap Investments GP, L.L.C.,
		its general partner

By:		/s/ Douglas E. Swanson, Jr.
Name:		Douglas E. Swanson, Jr.
Title:		Managing Director


EnCap Partners GP, LLC

By:		/s/ Douglas E. Swanson, Jr.
Name:		Douglas E. Swanson, Jr.
Title:		Managing Director

TPR Residual Assets, LLC

By:		EnCap Energy Capital Fund IX, L.P.,
		its sole member

By:		EnCap Equity Fund IX GP, L.P.,
		its general partner

By:		EnCap Investments L.P.,
		its general partner

By:		EnCap Investments GP, L.L.C.,
		its general partner

By:		/s/ Douglas E. Swanson, Jr.
Name:		Douglas E. Swanson, Jr.
Title:		Managing Director

Montage Resources Corp SC 13D/A