1) Apache Corporation

2) Arrington Oil & Gas Operating LLC

3) BlackRock Funds Services Group, LLC

4) CDP II Holdings, LLC

5) Comstock Resources, Inc.

6) Deep Blue Midland Basin LLC

7) DG Petro Oil & Gas, LLC

8) Enterprise Products Partners L.P.

9) Indian Exploration, Inc.

10) Linde Inc

11) Messer Americas

12) NGL Energy Partners LP

13) Permico Royalties LLC

14) SOGC LLC

15) Standard Lithium Ltd.

16) Targa Resources

17) Texas Independent Producers and Royalty Owners Association TIPRO

18) Waste Management Energy Services TX

19) Williams Companies