1) Hillco Partners

2) Houston Methodist

3) Legacy Community Health Services, Inc.

4) Purpose Built Communities

1) ACC Houston, LLC

2) AGC of Texas

3) Aquality Solutions, Inc.

4) Arcosa Aggregates Texas, LLC

5) Arcosa LWS, LLC

6) Arcosa Materials, Inc.

7) BFI Waste Services of Texas, LP

8) Colorado Materials, Ltd.

9) Dallas/Fort Worth International Airport

10) Ector County Generation LLC

11) Elgin 104 Holdings LLC

12) FA Victoria 1 LLC

13) First Ammonia LLC

14) Florence 160 Dev LLC

15) Florence FM 970 Ventures, LLC

16) Flying W Properties, Ltd.

17) Fort Bend County Municipal Utility District No. 292

18) Greens Bayou 6 LLC

19) Heartland Quarries LLC

20) HillCo Partners, LLC

21) HTX Utility Solutions LLC

22) Hunter Industries Ltd.

23) Jewett Mine LLC

24) Jimmy Evans Company Inc.

25) Jimmy Evans Company, LTD.

26) JTX Land Holdings LLC

27) Lion Elastomers LLC

28) Macon Enterprises, L.L.C. DBA AgriRock, L.L.C.

29) Negative Emissions Materials, Inc. trading as Atlas Materials

30) Northwest Williamson County Municipal Utility District No. 3

31) NRG Cedar Bayou 5 LLC

32) NRG Texas Power, LLC

33) OnSyte Performance LLC

34) PHR Holdings LLC

35) Pleak 54 Holdings, LLC

36) Power Infrastructure Partners, Inc.

37) Republic EES, LLC

38) Republic Services, Inc.

39) Republic Waste Services of Texas, Ltd.

40) RGI Materials Inc.

41) SE DC DevCo, LLC

42) Second Nature Compost LLC

43) SL Energy Power Plant I, LLC

44) SLR Property I, LP

45) SouthRidge Energy TX LLC

46) SouthRidge Holdings TX LLC

47) SouthRidge Land TX LLC

48) Southwest Shipyards L.P.

49) Tidal PWR, LLC

50) US Ecology Texas, Inc.

51) US Ecology, Inc.

52) Weisman Equipment Company, Ltd.

53) Williamson County Municipal Utility District No. 42

54) Zinc Resources LLC