| 1st Electric Contractors Inc | EC | 2002 | Active |
| 5280 Electric Inc | EC | 2014 | Active |
| A American Electric, L.L.C. | EC | 2000 | Active |
| A Electrical Connection LLC | EC | 2021 | Active |
| A Good Connection Electric, LLC | EC | 2014 | Active |
| Ac Electric & Innovative Tech | EC | 1988 | Active |
| AC Lighting and Electrical Contracting | EC | 2018 | Active |
| Aces Electric LLC | EC | 2026 | Active |
| Aegis Electric LLC | EC | 2026 | Active |
| Aim High HVAC, Inc. | EC | 2026 | Active |
| Alvarez Arc and Spark Electric LLC | EC | 2024 | Active |
| Attaboy Electric Service LLC | EC | 2014 | Active |
| B & T Electric, Inc. | EC | 1994 | Active |
| BMS Electric | EC | 2024 | Active |
| BP Electric | EC | 2021 | Active |
| Bragdon Electrical Contractors LLC | EC | 2004 | Active |
| BTC Electric | EC | 2006 | Active |
| Campbell Systems | EC | 1987 | Active |
| Carry The Light Electric Inc | EC | 1992 | Active |
| Chatfield Electric & Construction Inc. | EC | 2005 | Active |
| Colorado Electrical & Smart Integration INC | EC | 2017 | Active |
| Columbine Electric LLC | EC | 2025 | Active |
| D&L Electric, Inc. | EC | 2000 | Active |
| Deer Creek Electric | EC | 2001 | Active |
| Delleney Electric Company LLC | EC | 1992 | Active |
| Do Unto Others, LLC | EC | 2018 | Active |
| DS Electric LLC | EC | 2012 | Active |
| Dynamic Electric Solutions LLC. | EC | 2025 | Active |
| Ecopro Electric, LLC | EC | 2015 | Active |
| Edison Electric LLC | EC | 2022 | Active |
| Electric Avenue LLC | EC | 2007 | Active |
| Elkhorn Technical Resources, Inc | EC | 2010 | Active |
| ELS Electric LLC | EC | 2014 | Active |
| Evans Electrical Inc | EC | 1999 | Active |
| First Light Electric LLC | EC | 2014 | Active |
| Franklin Electric | EC | 1994 | Active |
| Full Contact Electrical Systems | EC | 2008 | Active |
| Full Spectrum Electric, Inc. | EC | 2007 | Active |
| G & H Electric Company | EC | 1965 | Active |
| G. E. C. Electric Inc. | EC | 2004 | Active |
| GE Electrical Controls | EC | 2006 | Active |
| Glaser Electric Company, LLC | EC | 2008 | Active |
| Glass Electric | EC | 2020 | Active |
| Goodguy Electric, LLC | EC | 2010 | Active |
| Greiner Electric LLC | EC | 1997 | Active |
| H&H Electric Inc | EC | 2016 | Active |
| Halo Electrical Group, LLC | EC | 2020 | Active |
| Haskins Electric | EC | 1999 | Active |
| Hepp Electric LLC | EC | 2020 | Active |
| High Peak Electric | EC | 2018 | Active |
| Highlander Electric LLC | EC | 2016 | Active |
| Highline Electric Llc | EC | 2001 | Active |
| Hinton Electric LLC | EC | 2023 | Active |
| Hobbes Electrical Consulting, Inc. dba HEC | EC | 2019 | Active |
| Inductance Electric Company LLC | EC | 2022 | Active |
| Innovative Electric & Lighting, Inc. | EC | 2012 | Active |
| Intelligent Design Electric LLC | EC | 2021 | Active |
| Interstate Electric and Solar | EC | 2015 | Active |
| Island Peak Electric | EC | 2024 | Active |
| J & A Electric | EC | 2005 | Active |
| JD Electrical Home Solutions | EC | 2022 | Active |
| KG Electric LLC | EC | 2023 | Active |
| Kyber Electrical Services LLC | EC | 2025 | Active |
| LaGrange Electric | EC | 2007 | Active |
| Lane Electric | EC | 1992 | Active |
| Lewkow Electric Inc | EC | 1998 | Active |
| LG Electrical, LLC | EC | 2023 | Active |
| Licciardi Electric LLC | EC | 2023 | Active |
| Light In The Dark Electric LLC | EC | 2021 | Active |
| LionHeart Electrical LLC | EC | 2020 | Active |
| Littleton Electric LLC | EC | 2025 | Active |
| Littleton Public Schools | EC | 2009 | Active |
| Livewire Electric Incorporated | EC | 2011 | Active |
| Long Building Technologies, Inc. | EC | 1993 | Active |
| Losaw Electric, Inc. | EC | 1967 | Active |
| Luminous Electric, Heating and Cooling LLC | EC | 2015 | Active |
| M. Gilmore Electric Inc. | EC | 2009 | Active |
| Majestic Electric | EC | 2017 | Active |
| MHC Electrical Solutions LLC | EC | 2023 | Active |
| Modernize Masters LLC | EC | 2025 | Active |
| Most Value Electric LLC. | EC | 2025 | Active |
| Mountain State Wiring Solutions, Inc. | EC | 2008 | Active |
| Murphy & Sons Electric LLC | EC | 2023 | Active |
| MZ Electric Co. | EC | 2009 | Active |
| NMC Electric LLC | EC | 2017 | Active |
| One-Line Electric, LLC | EC | 2010 | Active |
| Paulison Electric LLC | EC | 2016 | Active |
| Power Play Electrical Services LLC | EC | 2023 | Active |
| QuikPro Electrical | EC | 2018 | Active |
| RC Electric, Inc. | EC | 1999 | Active |
| RD Electric Inc | EC | 2013 | Active |
| Rebel Electrical LLC | EC | 2025 | Active |
| Redman Electric | EC | 2000 | Active |
| Regency Electric, LLC | EC | 1986 | Active |
| Respect Electric LLC | EC | 2016 | Active |
| RM Electric Inc | EC | 2003 | Active |
| Rocky Mountain Electric Systems LLC | EC | 2025 | Active |
| Rocky Mountain High Electric | EC | 2021 | Active |
| Rych Electric Inc. | EC | 2008 | Active |
| S Star Electric | EC | 2017 | Active |