1) ADVANCED ENERGY UNITED

2) AMERICAN AIRLINES, INC.

3) AMTRAK

4) ARIZONA TRANSIT ASSOCIATION

5) CITY OF CHANDLER

6) COMCAST CABLE COMMUNICATIONS MANAGEMENT, LLC

7) ENVIRONMENTAL DEFENSE ACTION FUND

8) HUALAPAI TRIBE

9) LIBERTY UTILITIES

10) MARICOPA COUNTY SPECIAL HEALTHCARE DISTRICT

11) MERCK SHARP & DOHME LLC. AND ITS AFFILIATES

12) PATTERN ENERGY

13) PLUS POWER

14) VISIT PHOENIX

15) WAYMO LLC