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) Linde Inc

9) Messer Americas

10) NGL Energy Partners LP

11) Permico Royalties LLC

12) PO&G Resources, LP

13) Standard Lithium Ltd.

14) Targa Resources

15) Waste Management Energy Services TX

16) Williams Companies