1) 3 Elements Group, SA

2) Air Products and Chemicals, Inc.

3) Alcoa USA Corp.

4) Arkansas Electric Cooperatives, Inc.

5) Bayer U.S. LLC

6) BLUEBONNET ELECTRIC COOPERATIVE, INC.

7) Brazos River Authority

8) CDM Smith Inc.

9) Celanese International Corporation

10) Chisholm Trail Disposal, LLC

11) Cielo Wind Power LLC

12) City of Abilene

13) Covestro LLC

14) Daikin Comfort Technologies North America

15) Eastman Chemical - Texas Operations

16) EdgeCloudLink, Inc.

17) El Paso and Hudspeth Counties Regional Water Supply Corporation

18) El Paso Water

19) Flint Hills Resources, LLC

20) Foster, Paul

21) Frontier Waste Solutions

22) Georgia-Pacific LLC

23) GEXA Energy

24) Green Group Holdings, LLC

25) Guadalupe-Blanco River Authority

26) Guardian Industries Holdings, LLC

27) Infor(US), LLC

28) INV Nylon Chemicals Americas, LLC

29) Koch Ag & Energy Solutions, LLC

30) Koch Engineered Solutions, LLC

31) Koch Supply & Trading, LP

32) Lone Star Transmission LLC

33) Lubbock Power and Light

34) New Braunfels Utilities

35) NextEra Energy Inc.

36) NextEra Energy Resources LLC

37) North Texas Municipal Water District

38) PCII, LLC

39) Phillips Infrastructure Corporation

40) Sky Global Partners, LLC

41) SL ENERGY POWER PLANT I, LLC

42) SLR Property I, LP

43) Southern Spirit Transmission, LLC C/O Pattern Energy Group, LP

44) Summit Next Gen, LLC

45) Syngenta Corporation

46) TEXSAR, Inc.

47) Trellis Company and Subsidiaries

48) Waste Control Specialist, LLC