X0306 4 2016-09-20 0 0001600470 Eclipse Resources Corp ECR 0001504103 EnCap Energy Capital Fund VIII, L.P. 1100 LOUISIANA STREET, SUITE 4900 HOUSTON TX 77002 0 0 1 0 0001229915 ZORICH ROBERT L 2121 OLD GATESBURG ROAD SUITE 110 STATE COLLEGE PA 16803 0 0 1 0 0001142791 PHILLIPS D MARTIN 2121 OLD GATESBURG ROAD SUITE 110 STATE COLLEGE PA 16803 0 0 1 0 0001537403 EnCap Energy Capital Fund VIII Co-Investors, L.P. 1100 LOUISIANA STREET, SUITE 4900 HOUSTON TX 77002 0 0 1 0 0001565683 EnCap Energy Capital Fund IX, L.P. 1100 LOUISIANA STREET, SUITE 4900 HOUSTON TX 77002 0 0 1 0 0001664141 EnCap Partners, LLC 1100 LOUISIANA STREET, SUITE 4900 HOUSTON TX 77002 0 0 1 0 Common Stock, par value $0.01 per share 2016-09-20 4 J 0 59687619 0.00 A 59687619 D Common Stock, par value $0.01 per share 2016-09-20 4 J 0 33159784 0.00 A 40420114 I See footnote Common Stock, par value $0.01 per share 2016-09-20 4 J 0 46016031 0.00 A 72847294 I See footnote Common Stock, par value $0.01 per share 2016-09-20 4 J 0 140353407 0.00 D 0 I See footnote Common Stock, par value $0.01 per share 23373 I See footnote Common Stock, par value $0.01 per share 23373 I See footnote Distribution of the common stock of Eclipse Resources Corporation (the "Issuer") by Eclipse Resources Holdings, L.P. ("Eclipse Holdings") to its limited partners in connection with the dissolution of Eclipse Holdings. The reporting person disclaims 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 the reporting person is the beneficial owner of the reported securities for purposes of Section 16 or for any other purpose. These securities are directly held by EnCap Energy Capital Fund VIII, L.P. ("EnCap Fund VIII"). EnCap Partners, LLC ("EnCap Partners") is the managing member of EnCap Investments Holdings, LLC ("EnCap Holdings"), which is the sole member of EnCap Investments GP, L.L.C. ("EnCap Investments GP"), the general partner of EnCap Investments L.P. ("EnCap Investments"), which is the general partner of EnCap Equity Fund VIII GP, L.P. ("EnCap Fund VIII GP"), the sole general partner of EnCap Fund VIII. Therefore, EnCap Partners, EnCap Holdings, EnCap Investments GP, EnCap Investments and EnCap Fund VIII GP may be deemed to beneficially own these securities. These securities are directly held by EnCap Energy Capital Fund VIII Co-Investors, L.P. ("EnCap Fund VIII Co-Invest"). EnCap Partners is the managing member of EnCap Holdings, which is the sole member of EnCap Investments GP, the general partner of EnCap Investments, which is the general partner of EnCap Fund VIII GP, the sole general partner of EnCap Fund VIII Co-Invest. Therefore, EnCap Partners, EnCap Holdings, EnCap Investments GP, EnCap Investments and EnCap Fund VIII GP may be deemed to beneficially own these securities. These securities are directly held by EnCap Energy Capital Fund IX, L.P. ("EnCap Fund IX"). EnCap Partners is the managing member of EnCap Holdings, which is the sole member of EnCap Investments GP, the general partner of EnCap Investments, which 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, EnCap Holdings, EnCap Investments GP, EnCap Investments and EnCap Fund IX GP may be deemed to beneficially own these securities. These securities were directly held by Eclipse Holdings. These securities are directly held by Robert L. Zorich. These securities are directly held by D. Martin Phillips. Exhibit List Exhibit 99 - Joint Filer Information 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, Sr. Managing Director 2016-09-22