1) 3 Elements Group, SA

2) Air Products and Chemicals, Inc.

3) Bayer U.S. LLC

4) BLUEBONNET ELECTRIC COOPERATIVE, INC.�

5) Brazos River Authority

6) CDM Smith Inc.

7) Celanese International Corporation

8) Chisholm Trail Disposal, LLC

9) Covestro LLC

10) Daikin Comfort Technologies Manufacturing, Inc.

11) Eastman Chemical - Texas Operations

12) El Paso and Hudspeth Counties Regional Water Supply Corporation

13) El Paso Water

14) Flint Hills Resources, LLC

15) Foster, Paul

16) Frontier Waste Solutions

17) Georgia-Pacific LLC

18) GEXA Energy

19) Green Group Holdings, LLC

20) Guadalupe-Blanco River Authority

21) Guardian Industries Holdings, LLC

22) Infor(US), LLC

23) INV Nylon Chemicals Americas, LLC

24) Koch Ag & Energy Solutions, LLC

25) Koch Engineered Solutions, LLC

26) Koch Supply & Trading, LP

27) Lone Star Transmission LLC

28) Lubbock Power and Light

29) New Braunfels Utilities

30) NextEra Energy Inc.

31) NextEra Energy Resources LLC

32) North Texas Municipal Water District

33) PCII, LLC

34) Phillips Infrastructure Corporation

35) San Jacinto River Authority

36) SL ENERGY POWER PLANT I, LLC

37) SLR Property I, LP

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

39) TEXSAR, Inc.

40) Trellis Company and Subsidiaries

41) Uranium Energy Corp

42) Waste Control Specialist, LLC