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) Geronimo Power, LLC (formerly National Grid Renewables)

7) Great River Energy

8) MN Transmission Owners

9) ONEOK

10) Otter Tail Power Company

11) Ranger Power LLC

12) Summit Carbon Solutions

13) Xcel Energy Services, Inc.