| Elite Home Services Ltd. | EC | 2026 | Active |
| Empower Electric LLC | EC | 2015 | Active |
| Empowercom, Inc. | EC | 2021 | Active |
| Endless Electric LLC | EC | 2020 | Active |
| Endpoint Electrical Solutions LLC | EC | 2024 | Active |
| Energy Management Corporation | EC | 2010 | Active |
| Essi Solutions Inc | EC | 2012 | Active |
| ETG Systems Inc | EC | 2008 | Active |
| EVO Electric LLC | EC | 2020 | Active |
| Ex-cel Electric LLC | EC | 1984 | Active |
| Excellent Electrical Solutions LLC | EC | 2025 | Active |
| Execution Electric LLC | EC | 2024 | Active |
| F1 Consulting LLC | EC | 2012 | Active |
| Facility Solutions Group Inc | EC | 1992 | Active |
| FBS LLC | EC | 2021 | Active |
| Feiner Electricians LLC | EC | 2016 | Active |
| Fritz Electric, LLC | EC | 2017 | Active |
| Front Range Sparky LLC | EC | 2026 | Active |
| Fulgur Electric LLC | EC | 2023 | Active |
| Gen X Electric LLC | EC | 2015 | Active |
| Gnarled Ranch Electric | EC | 2019 | Active |
| Go Green Electric, Inc. | EC | 2008 | Active |
| Golden West Plumbing Heating & Air Conditioning | EC | 2013 | Active |
| Goldstar Electric LLC | EC | 2013 | Active |
| Good Electric Service Company, Inc. | EC | 1989 | Active |
| Good Guy Electric LLC | EC | 2025 | Active |
| Green Home Electric LLC | EC | 2019 | Active |
| Greenwood Services LLC | EC | 2014 | Active |
| GRID Alternatives Colorado Inc. | EC | 2013 | Active |
| GTC Electrical Contracting LLC | EC | 2022 | Active |
| Guarantee Electrical Contracting, LLC | EC | 2013 | Active |
| Guardian Electrical Services LLC | EC | 2019 | Active |
| Haffner House Electric Company, LLC | EC | 2024 | Active |
| Harvey Park Electric | EC | 2026 | Active |
| Hayes Electric Service, Inc. | EC | 1993 | Active |
| Heart HCPE Group, LLC | EC | 2020 | Active |
| Helios Electric LLC | EC | 2025 | Active |
| HES Electric | EC | 1983 | Active |
| High Altitude Electric, Inc. | EC | 2013 | Active |
| Highland Renovations Electric, LLC | EC | 2015 | Active |
| HOhms Electrical Services LLC | EC | 2026 | Active |
| Hoodbuilder Inc | EC | 2025 | Active |
| Huron Electric LLC | EC | 2026 | Active |
| Hyland Hills Park & Recreation District | EC | 1992 | Active |
| Ideal Electric Inc. | EC | 1996 | Active |
| Illuminate Electric | EC | 2001 | Active |
| Innovative Power Electrical Services LLC | EC | 2016 | Active |
| Integritas Electric | EC | 2019 | Active |
| International Power Systems, Inc. | EC | 1995 | Active |
| J.O.Electric | EC | 2026 | Active |
| Jaramillo Electric LLC | EC | 2026 | Active |
| Jat&Co Services | EC | 2017 | Active |
| Jeatc - Denver | EC | 1995 | Active |
| Jedi Electric LLC | EC | 2019 | Active |
| Jimenez Electric Inc | EC | 2021 | Active |
| JK Electric | EC | 2009 | Active |
| Johnathon Hanson Electrical Contracting | EC | 2011 | Active |
| Joseph Freyta Electric | EC | 2023 | Active |
| JPR Construction Connections | EC | 2021 | Active |
| KB Electric LLC DBA Matzen Electric | EC | 2023 | Active |
| KDM Industries LLC dba Full Spectrum Lighting | EC | 2026 | Active |
| Kenny Electric Service Inc | EC | 1975 | Active |
| King Soopers | EC | 2017 | Active |
| Kingdom Electric, LLC | EC | 2011 | Active |
| Krohn Electric LLC | EC | 2023 | Active |
| Law Electric, LLC | EC | 2006 | Active |
| Least Unqualified Electrical Services | EC | 2025 | Active |
| LED Boys LLC | EC | 2000 | Active |
| Legend Electric | EC | 2002 | Active |
| LEI Companies, Inc. | EC | 2002 | Active |
| LES Inc. | EC | 2025 | Active |
| Lighting Up Hartsel Electric LLC | EC | 2024 | Active |
| Lightning Mobile Electric LLC | EC | 2019 | Active |
| Lights On Of Colorado | EC | 2003 | Active |
| Listen Up inc | EC | 2014 | Active |
| Lovato lighting & power llc | EC | 2024 | Active |
| Mashar Electric LLC | EC | 2016 | Active |
| May Electric LLC | EC | 2025 | Active |
| May Power Electric LLC | EC | 2020 | Active |
| MC2 Electrical Contractors, LLC | EC | 1998 | Active |
| McCarthy Building Companies, Inc. | EC | 2016 | Active |
| MCM Electric LLC | EC | 2018 | Active |
| McVolt Electric LLC | EC | 2006 | Active |
| MG Power Electric LLC | EC | 2025 | Active |
| MH Electrical and Solar LLC | EC | 2015 | Active |
| Mighty Plumbing Heating Air Electric LLC | EC | 2023 | Active |
| Miguerra Electric LLC | EC | 2001 | Active |
| Mile High Electric Inc. | EC | 2010 | Active |
| Mister Ohm Electric LLC | EC | 2025 | Active |
| Monarca Electric LLC | EC | 2023 | Active |
| MST Electric LLC | EC | 2026 | Active |
| MtyBee Electric LLC | EC | 1997 | Active |
| MV Electrical Solutions | EC | 2023 | Active |
| Nikola Electric LLC | EC | 2024 | Active |
| Nili Electric LLC | EC | 2012 | Active |
| Odin Electric LLC | EC | 2021 | Active |
| Parks & Recreation Maintenance | EC | 1991 | Active |
| PeopleReady, Inc | EC | 2011 | Active |
| Permanent Power Plus | EC | 2024 | Active |
| Pineda Electrical Service LLC | EC | 2024 | Active |