| Alliant Energy | 2004 |
| American Council for an Energy-Efficient Economy (ACEEE) | 2000 |
| Argonne National Laboratory | 2011 |
| Bidgely | 2018 |
| Bradford White Corporation | 2019 |
| Cadmus | 2004 |
| CenterPoint Energy | 2004 |
| CLEAResult | 2013 |
| Cooperative Educational Service Agency 10 (CESA 10) | 2016 |
| D+R International | 2011 |
| DNV GL | 2005 |
| E Source | 2010 |
| Ecotagious | 2019 |
| Edison Foundation Institute for Electric Innovation | 2009 |
| Elevate Energy | 2017 |
| Energy Education Council | 2007 |
| Energy Insight, Inc. | 2015 |
| Evergreen Consulting Group | 2018 |
| Future Energy Enterprises, LLC | 2009 |
| Geothermal Exchange Organization (GEO) | 2014 |
| GTI | 2017 |
| Honeywell Smart Grid Solutions | 2014 |
| ICF | 2000 |
| JadeTrack | 2019 |
| Leidos | 2010 |
| Lime Energy | 2012 |
| Lockheed Martin | 2009 |
| MaxLite | 2018 |
| Morgan Marketing Partners | 2010 |
| Navigant Consulting, Inc. | 2003 |
| Northwest Energy Efficiency Council (NEEC) | 2008 |
| PACENation | 2018 |
| Philips Lighting | 2012 |
| Power TakeOff, Inc. | 2017 |
| Resource Innovations | 2016 |
| Sodexo | 2017 |
| The National Energy Improvement Fund (NEIF) | 2015 |
| Wisconsin Office of Energy Innovation | 2014 |
| WPPI Energy | 2018 |
| Xcel Energy | 2000 |
