| Accelerated Innovations | 2017 |
| American Efficient | 2018 |
| Applied Energy Group | 2019 |
| Bidgely | 2018 |
| Cedar Falls Utilities | 2011 |
| CLEAResult | 2013 |
| D+R International | 2011 |
| DNV GL | 2005 |
| East Kentucky Power Cooperative | 2012 |
| Energy Solutions | 2017 |
| EnergyX Solutions Inc | 2019 |
| Enervee | 2014 |
| Erthe Energy Solutions | 2018 |
| Evergreen Consulting Group | 2018 |
| Group O, Inc. | 2018 |
| Honeywell Smart Grid Solutions | 2014 |
| ILLUME | 2018 |
| JadeTrack | 2019 |
| Leidos | 2010 |
| Lime Energy | 2012 |
| Lockheed Martin | 2009 |
| Milepost Consulting, SPC | 2019 |
| Ohio's Electric Cooperatives | 2014 |
| Oracle Utilities | 2010 |
| Power TakeOff, Inc. | 2017 |
| Recurve | 2018 |
| Uplight | 2019 |
| Varentec | 2018 |
| VEIC | 2015 |
| Wabash Valley Power Association | 2004 |
| Waypoint | 2017 |
| West Monroe Partners | 2014 |
