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) Cielo Wind Power LLC

11) Covestro LLC

12) Daikin Comfort Technologies Manufacturing, Inc.

13) Eastman Chemical - Texas Operations

14) El Paso and Hudspeth Counties Regional Water Supply Corporation

15) El Paso Water

16) Flint Hills Resources, LLC

17) Foster, Paul

18) Frontier Waste Solutions

19) Georgia-Pacific LLC

20) GEXA Energy

21) Green Group Holdings, LLC

22) Guadalupe-Blanco River Authority

23) Guardian Industries Holdings, LLC

24) Infor(US), LLC

25) INV Nylon Chemicals Americas, LLC

26) Koch Ag & Energy Solutions, LLC

27) Koch Engineered Solutions, LLC

28) Koch Supply & Trading, LP

29) Lone Star Transmission LLC

30) Lubbock Power and Light

31) New Braunfels Utilities

32) NextEra Energy Inc.

33) NextEra Energy Resources LLC

34) North Texas Municipal Water District

35) PCII, LLC

36) Phillips Infrastructure Corporation

37) San Jacinto River Authority

38) SL ENERGY POWER PLANT I, LLC

39) SLR Property I, LP

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

41) TEXSAR, Inc.

42) Trellis Company and Subsidiaries

43) Uranium Energy Corp

44) Waste Control Specialist, LLC