Sec Form 4 Filing - EnCap Energy Capital Fund VIII, L.P. @ Eclipse Resources Corp - 2018-01-18

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 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 EnCap Energy Capital Fund VIII, L.P. 2. Issuer Name and Ticker or Trading Symbol Eclipse Resources Corp [ ECR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1100 LOUISIANA STREET, SUITE 4900 3. Date of Earliest Transaction (MM/DD/YY) 01/18/2018 (Street) HOUSTON, TX77002 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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, par value $0.01 per share 01/18/2018 P 37,823,596 A $ 2.4383 ( 1 ) ( 2 ) 37,823,596 ( 3 ) I See footnotes ( 4 ) ( 5 ) Common Stock, par value $0.01 per share 40,420,114 I See footnote ( 6 ) Common Stock, par value $0.01 per share 72,847,294 I See footnote ( 7 ) Common Stock, par value $0.01 per share 59,687,619 D ( 8 ) Common Stock, par value $0.01 per share 23,373 I See footnote ( 9 ) Common Stock, par value $0.01 per share 23,373 I See footnote ( 10 ) Common Stock, par value $0.01 per share 23,373 I See footnote ( 11 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other EnCap Energy Capital Fund VIII, L.P. 1100 LOUISIANA STREET, SUITE 4900 HOUSTON, TX77002 X EnCap Energy Capital Fund VIII Co-Investors, L.P. 1100 LOUISIANA STREET, SUITE 4900 HOUSTON, TX77002 X EnCap Energy Capital Fund IX, L.P. 1100 LOUISIANA STREET, SUITE 4900 HOUSTON, TX77002 X EnCap Partners GP, LLC 1100 LOUISIANA STREET, SUITE 4900 HOUSTON, TX77002 X ZORICH ROBERT L 1100 LOUISIANA STREET, SUITE 4900 HOUSTON, TX77002 X PHILLIPS D MARTIN 1100 LOUISIANA STREET, SUITE 4900 HOUSTON, TX77002 X Swanson Douglas E Jr 1100 LOUISIANA STREET, SUITE 4900 HOUSTON, TX77002 X Signatures EnCap Energy Capital Fund VIII, L.P., By: EnCap Equity Fund VIII GP, L.P., its general partner, EnCap Investments L.P., its general partner, EnCap Investments GP, L.L.C, its general partner, /s/ D. Martin Phillips, Managing Partner 01/22/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On January 18, 2018, Eclipse Resources-PA, LP ("Eclipse PA"), a wholly owned subsidiary of Eclipse Resources Corporation, a Delaware corporation (the "Issuer"), and the Issuer completed the purchase of certain oil and gas leases, wells and other oil and gas rights and interests held by Travis Peak Resources, LLC, a Delaware limited liability company ("Travis Peak") covering approximately 44,500 net acres located in the counties of Tioga and Potter in the Commonwealth of Pennsylvania (such transaction, the "Travis Peak Transaction") pursuant to that certain Purchase and Sale Agreement dated December 8, 2017 by and among Travis Peak, the Issuer and Eclipse PA (the "PSA"). The aggregate purchase price for the Travis Peak Transaction, as adjusted pursuant to the PSA, was $92.2 million (the "Purchase Price"), ( 2 )(Continued from Footnote 1) which the Issuer paid entirely through the issuance of 37,823,596 shares (the "Shares") of the Issuer's shares of common stock, $0.01 par value (the "Common Stock") to Travis Peak. The number of Shares issued to Travis Peak was calculated by dividing the Purchase Price by $2.4383, which was the 30 consecutive-day volume weighted average price per share of the Common Stock ending on the second trading day immediately preceding the closing date. ( 3 )The reporting persons disclaim beneficial ownership of the reported securities except to the extent of such reporting person's pecuniary interest therein, and this report shall not be deemed an admission that such reporting person is the beneficial owner of the reported securities for purposes of Section 16 or for any other purpose. ( 4 )These securities are directly held by Travis Peak. Travis Peak is member-managed by TPR Holding Company, LLC ("TPR Holding"). EnCap Energy Capital Fund IX, L.P. ("EnCap Fund IX") is a member of TPR Holding that holds the right to appoint three of the five representatives to the board of managers of TPR Holding. Each of the representatives to the board of managers of TPR Holding has one vote and decisions are made by a majority vote. As a result, EnCap Fund IX may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares owned by Travis Peak. The Form 4 filed on September 22, 2016 listed EnCap Partners, LLC as a reporting person. Effective April 6, 2017, EnCap Partners, LLC was converted into a limited partnership with the name EnCap Partners, LP ("EnCap Partners"). In connection with the conversion, EnCap Partners GP, LLC ("EnCap Partners GP") was formed as its sole general partner. ( 5 )(Continued from Footnote 4) EnCap Partners GP replaces EnCap Partners, LLC as a reporting person and a joint filer. EnCap Partners GP is the sole general partner of EnCap Partners, which is the managing member of EnCap Investments Holdings, LLC ("EnCap Holdings"), which is the sole member of EnCap Investments Holdings Blocker, LLC ("EnCap Holdings Blocker"). EnCap Holdings Blocker is the sole member of EnCap Investments GP, L.L.C. ("EnCap Investments GP"), which is the sole general partner of EnCap Investments L.P. ("EnCap Investments LP"). EnCap Investments LP is the general partner of EnCap Equity Fund IX GP, L.P. ("EnCap Fund IX GP"), the sole general partner of EnCap Fund IX. Therefore, EnCap Partners GP, EnCap Partners, EnCap Holdings, EnCap Holdings Blocker, EnCap Investments GP, EnCap Investments LP and EnCap Fund IX GP may be deemed to beneficially own these securities. ( 6 )These securities are directly held by EnCap Energy Capital Fund VIII Co-Investors, L.P. ("EnCap Fund VIII Co-Invest"). EnCap Partners GP is the sole general partner of EnCap Partners, which is the managing member of EnCap Holdings, which is the sole member of EnCap Holdings Blocker. EnCap Holdings Blocker is (i) the sole member of EnCap Investments GP, which is the sole general partner of EnCap Investments LP, and (ii) the sole limited partner of EnCap Investments LP. EnCap Investments LP is the general partner of EnCap Equity Fund VIII GP, L.P. ("EnCap Fund VIII GP"), the sole general partner of EnCap Fund VIII Co-Invest. Therefore, EnCap Partners GP, EnCap Partners, EnCap Holdings, EnCap Holdings Blocker, EnCap Investments GP, EnCap Investments LP and EnCap Fund VIII GP may be deemed to beneficially own these securities. ( 7 )These securities are directly held by EnCap Fund IX. EnCap Partners GP is the sole general partner of EnCap Partners, which is the managing member of EnCap Holdings, which is the sole member of EnCap Holdings Blocker. EnCap Holdings Blocker is the sole member of EnCap Investments GP, which is the sole general partner of EnCap Investments LP. EnCap Investments LP is the general partner of EnCap Fund IX GP, the sole general partner of EnCap Fund IX. Therefore, EnCap Partners GP, EnCap Partners, EnCap Holdings, EnCap Holdings Blocker, EnCap Investments GP, EnCap Investments LP and EnCap Fund IX GP may be deemed to beneficially own these securities. ( 8 )These securities are directly held by EnCap Energy Capital Fund VIII, L.P. ("EnCap Fund VIII"). EnCap Partners GP is the sole general partner of EnCap Partners, which is the managing member of EnCap Holdings, which is the sole member of EnCap Holdings Blocker. EnCap Holdings Blocker is the sole member of EnCap Investments GP, which is the sole general partner of EnCap Investments LP. EnCap Investments LP is the general partner of EnCap Equity Fund VIII GP, the sole general partner of EnCap Fund VIII Co-Invest. Therefore, EnCap Partners GP, EnCap Partners, EnCap Holdings, EnCap Holdings Blocker, EnCap Investments GP, EnCap Investments LP and EnCap Fund VIII GP may be deemed to beneficially own these securities. ( 9 )These securities are directly held by Robert L. Zorich. ( 10 )These securities are directly held by D. Martin Phillips. ( 11 )These securities are directly held by Douglas E. Swanson, Jr.

Remarks: Exhibit List Exhibit 99 - Joint Filer Information

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

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