X0306 4 2016-11-01 1 0001617798 PennTex Midstream Partners, LP PTXP 0001606887 NGP X US Holdings LP 5221 N. OCONNOR BLVD., SUITE 1100 IRVING TX 75039 1 0 1 0 0001647719 NGP X Holdings GP, L.L.C. 5221 N. O?CONNOR BLVD., SUITE 1100 IRVING TX 75039 1 0 1 0 0001521229 NGP Natural Resources X, L.P. 5221 N. O?CONNOR BLVD., SUITE 1100 IRVING TX 75039 1 0 1 0 0001598409 NGP X Parallel Holdings, L.P. 5221 N. O?CONNOR BLVD., SUITE 1100 IRVING TX 75039 1 0 1 0 0001555576 GFW X, L.L.C. 5221 N. O?CONNOR BLVD., SUITE 1100 IRVING TX 75039 1 0 1 0 0001555496 G.F.W. Energy X, L.P. 5221 N. O?CONNOR BLVD., SUITE 1100 IRVING TX 75039 1 0 1 0 0001471812 NGP Energy Capital Management, L.L.C. 5221 N. O'CONNOR BLVD., SUITE 1100 IRVING TX 75039 1 0 1 0 Common Units (Limited Partner Interests) 2016-11-01 4 S 0 3262019 D 0 I See Footnotes Subordinated Units (Limited Partner Interests) 2016-11-01 4 S 0 12500000 A Common Units 12500000 0 I See Footnotes The reported securities are held by PennTex Midstream Partners, LLC ("PennTex Development"). On November 1, 2016, NGP X US Holdings LP ("NGP X Holdings") transferred and assigned to Energy Transfer Partners, L.P. ("ETP") all of its 95.147% interest in PennTex Development, which owns 3,262,019 common units and 12,500,000 subordinated units of PennTex Midstream Partners, LP (the "Partnership"), in exchange for a combination of cash and ETP common units with a value equal to $343,091,523. The reporting owner disclaims beneficial ownership of the Partnership common units and subordinated units except to the extent of it pecuniary interest therein. This Form 4 is filed jointly by NGP X Holdings, NGP Natural Resources X, L.P. ("NGP X"), NGP X Parallel Holdings, L.P. ("NGP X Parallel"), GFW X, L.L.C. ("GFW X"), G.F.W. Energy X, L.P. ("GFW Energy X") and NGP Energy Capital Management, L.L.C. ("NGP ECM"). NGP X Holdings is wholly owned and controlled by its general partner, NGP X Holdings GP, L.L.C. ("NGP X Holdings GP"), and its limited partners, NGP X and NGP X Parallel. NGP X Holdings GP is wholly owned by NGP X. GFW Energy X is the sole general partner of NGP X and NGP X Parallel. GFW X is the sole general partner of GFW Energy X. GFW X has delegated full power and authority to manage NGP X and NGP X Parallel to NGP ECM. Accordingly, NGP X Holdings, NGP X Holdings GP, NGP X, NGP X Parallel, GFW X, GFW Energy X and NGP ECM may be deemed to share voting and dispositive power over the reported units, and therefore may also be deemed to be the beneficial owner of these units but disclaims such ownership except to the extent of its pecuniary interest therein. Subordinated units will convert into common units on a one-for-one basis as described in the Issuer's Registration Statement on Form S-1 (Registration No. 333-199020). /s/ Tony R. Weber, Authorized Person of NGP X Holdings GP, L.L.C., general partner of NGP X US Holdings, LP 2016-11-03 /s/ Tony R. Weber, Authorized Person of NGP X Holdings GP, L.L.C. 2016-11-03 /s/ Tony R. Weber, Authorized Member of GFW X, L.L.C., general partner of G.F.W. Energy X, L.P., general partner of NGP Natural Resources X, L.P. 2016-11-03 /s/ Tony R. Weber , Authorized Member of GFW X, L.L.C., general partner of G.F.W. Energy X, L.P., general partner of NGP X Parallel Holdings, L.P. 2016-11-03 /s/ Tony R. Weber , Authorized Member of GFW X, L.L.C. 2016-11-03 /s/ Tony R. Weber , Authorized Member of GFW X, L.L.C., general partner of G.F.W. Energy X, L.P. 2016-11-03 /s/ Tony R. Weber, Chief Operating Officer of NGP Energy Capital Management, L.L.C. 2016-11-03