1) 3 Elements Group, SA

2) Air Products and Chemicals, Inc.

3) Arkansas Electric Cooperatives, Inc.

4) Bayer U.S. LLC

5) BLUEBONNET ELECTRIC COOPERATIVE, INC.�

6) Brazos River Authority

7) CDM Smith Inc.

8) Celanese International Corporation

9) Chisholm Trail Disposal, LLC

10) Covestro LLC

11) Daikin Comfort Technologies Manufacturing, Inc.

12) Eastman Chemical - Texas Operations

13) El Paso and Hudspeth Counties Regional Water Supply Corporation

14) El Paso Water

15) Flint Hills Resources, LLC

16) Foster, Paul

17) Frontier Waste Solutions

18) Georgia-Pacific LLC

19) GEXA Energy

20) Green Group Holdings, LLC

21) Guadalupe-Blanco River Authority

22) Guardian Industries Holdings, LLC

23) Infor(US), LLC

24) INV Nylon Chemicals Americas, LLC

25) Koch Ag & Energy Solutions, LLC

26) Koch Engineered Solutions, LLC

27) Koch Supply & Trading, LP

28) Lone Star Transmission LLC

29) Lubbock Power and Light

30) New Braunfels Utilities

31) NextEra Energy Inc.

32) NextEra Energy Resources LLC

33) North Texas Municipal Water District

34) PCII, LLC

35) Phillips Infrastructure Corporation

36) San Jacinto River Authority

37) SL ENERGY POWER PLANT I, LLC

38) SLR Property I, LP

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

40) TEXSAR, Inc.

41) Trellis Company and Subsidiaries

42) Uranium Energy Corp

43) Waste Control Specialist, LLC