1) alliantgroup

2) Altria Client Services LLC

3) American Bus Association

4) American Fuel and Petrochemical Manufacturers (AFPM)

5) Avangrid

6) Barrick Gold Corporation of North America Inc.

7) Charter Communications

8) Clearway Energy Group

9) E.ON Climate & Renewables North America Inc.

10) EDF Renewable Energy

11) Exelon Business Services Co., LLC

12) Ford Motor Company

13) Hallmark Cards

14) Health Care Service Corporation

15) Invenergy Wind, LLC

16) Lincoln Clean Energy, LLC

17) Marathon Petroleum Company LP

18) Mondelez International

19) Morgan Stanley Dean Witter & Company

20) National Council of Farmer Cooperatives

21) NextEra Energy, Inc.

22) Pattern Energy Group

23) Terra-Gen Power LLC

24) The Bank of New York Mellon

25) The Goldman Sachs Group, Inc.

26) The Northwestern Mutual Life Insurance Company

27) Tinuum Group LLC

28) Vestas-American Wind Technology, Inc.

29) Westlake Chemical Partners, LP