| Applied Energy Group | 2019 |
| Bidgely | 2018 |
| Blue Line Innovations | 2018 |
| Cedar Falls Utilities | 2011 |
| D+R International | 2011 |
| East Kentucky Power Cooperative | 2012 |
| Emerson Commercial & Residential Solutions | 2019 |
| Energy Insight, Inc. | 2015 |
| Energy Solutions | 2017 |
| Enervee | 2014 |
| Frontier Energy | 2017 |
| JadeTrack | 2019 |
| Leidos | 2010 |
| Lime Energy | 2012 |
| Milepost Consulting, SPC | 2019 |
| Nest | 2015 |
| Ohio's Electric Cooperatives | 2014 |
| Oracle Utilities | 2010 |
| Powerley | 2018 |
| Resource Action Programs | 2012 |
| Uplight | 2019 |
| Varentec | 2018 |
| VEIC | 2015 |
| Wabash Valley Power Association | 2004 |
