1) alliantgroup

2) Altria Client Services LLC

3) American Bus Association

4) American Investment Council

5) Avangrid

6) Citadel LLC

7) Clearway Energy Group

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

9) EDF Renewable Energy

10) Invenergy Wind, LLC

11) Lincoln Clean Energy, LLC

12) Morgan Stanley Dean Witter & Company

13) National Venture Capital Association

14) NextEra Energy, Inc.

15) Pattern Energy Group

16) Securities Industry and Financial Markets Association

17) Terra-Gen Power LLC

18) The Large Public Power Council

19) United Services Automobile Association

20) Vestas-American Wind Technology, Inc.