No securities are beneficially owned.
This Form 3 is being filed by NGP XI US Holdings, L.P., NGP Pearl Holdings II, LLC and Luxe Energy, LLC. NGP XI Holdings GP, L.L.C. is the sole general partner of NGP XI US Holdings, L.P., and NGP Natural Resources XI, L.P. is the sole member of NGP XI Holdings GP, L.L.C. G.F.W. Energy XI, L.P. is the sole general partner of NGP Natural Resources XI, L.P., and GFW XI, L.L.C. is the sole general partner of G.F.W. Energy XI, L.P. GFW XI, L.L.C. has delegated full power and authority to manage NGP XI US Holdings, L.P. to NGP Energy Capital Management, L.L.C. Chris Carter, Craig Glick and Jill Lampert serve on the Executive Committee of NGP Energy Capital Management, L.L.C. NGP XII US Holdings, L.P. controls NGP Pearl Holdings II, LLC. NGP XII Holdings GP, L.L.C. is the sole general partner of NGP XII US Holdings, L.P., and NGP Natural Resources XII, L.P. is the sole member of NGP XII Holdings GP, L.L.C. G.F.W. Energy XII, L.P. is the sole general partner of NGP Natural Resources XII, L.P., and GFW XII, L.L.C. is the sole general partner of G.F.W. Energy XII, L.P. GFW XII, L.L.C. has delegated full power and authority to manage NGP XII US Holdings, L.P. to NGP Energy Capital Management, L.L.C. Chris Carter, Craig Glick and Jill Lampert serve on the Executive Committee of NGP Energy Capital Management, L.L.C. NGP XI US Holdings, LP controls Luxe Energy, LLC. NGP XI Holdings GP, L.L.C. is the sole general partner of NGP XI US Holdings, L.P., and NGP Natural Resources XI, L.P. is the sole member of NGP XI Holdings GP, L.L.C. G.F.W. Energy XI, L.P. is the sole general partner of NGP Natural Resources XI, L.P., and GFW XI, L.L.C. is the sole general partner of G.F.W. Energy XI, L.P. GFW XI, L.L.C. has delegated full power and authority to manage NGP XI US Holdings, L.P. to NGP Energy Capital Management, L.L.C. Chris Carter, Craig Glick and Jill Lampert serve on the Executive Committee of NGP Energy Capital Management, L.L.C.