1) Amazon Data Services, Inc.

2) Apex Clean Energy Management LLC

3) Dairyland Power Cooperative

4) EDF Renewables, Inc.

5) Enbridge Energy Partners LP

6) Great River Energy

7) ITC Holdings Corp (Intl Transmission Co)

8) MN Transmission Owners

9) National Grid Renewables

10) ONEOK

11) Otter Tail Power Company

12) Ranger Power LLC

13) Summit Carbon Solutions

14) Xcel Energy Services, Inc.