1) Air Products and Chemicals, Inc.

2) Alcoa USA Corp.

3) BLUEBONNET ELECTRIC COOPERATIVE, INC.

4) Brazos River Authority

5) CDM Smith Inc.

6) Celanese International Corporation

7) Chisholm Trail Disposal, LLC

8) City of Frisco

9) Covestro LLC

10) Cowboy Aggregates, LLC

11) Daikin Comfort Technologies North America

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) Franklin Mountain Investments, LP

18) Franklin Mountain Management, LLC

19) Frisco Economic Development Corporation Board

20) Frontier Waste Solutions

21) Georgia-Pacific LLC

22) GEXA Energy

23) Green Group Holdings, LLC

24) Guadalupe-Blanco River Authority

25) Guardian Industries Holdings, LLC

26) Infor (US), LLC

27) INV Nylon Chemicals Americas, LLC

28) Koch Ag & Energy Solutions, LLC

29) Koch Engineered Solutions, LLC

30) Koch Supply & Trading, LP

31) Lone Star Transmission LLC

32) Long Cove Development, Inc., on behalf of the Lake View Management & Devolpment District

33) Lubbock Power and Light

34) NextEra Energy Inc.

35) NextEra Energy Resources LLC

36) North Texas Municipal Water District

37) Phillips Infrastructure Holdings Inc.

38) RS&H Inc.

39) SLR Property I, LP

40) Southern Spirit Transmission LLC c/o Pattern Energy Group LP

41) Summit Next Gen, LLC

42) Trellis Company and Subsidiaries

43) Waste Control Specialist, LLC