| Nela Power Solution Inc | C10 | 2024 | Active |
| New Century Builders And Developers Inc | C10 + B, C36 | 2014 | Active |
| New Era Electrical Inc | C10 | 2022 | Active |
| New Line Electrik Inc | C10 | 2021 | Active |
| New Vision Electric | C10 + B | 2018 | Active |
| Nexus Construction & Design Inc | C10 + B, C20, C36 +1 | 2024 | Active |
| Nexus Electrical Services | C10 | 2024 | Active |
| Norchem Corporation | C10 | 2016 | Active |
| Nyco Electronics Inc | C10 | 2007 | Active |
| O C A Electrical Inc | C10 + C7 | 2013 | Active |
| O G Electric | C10 | 2024 | Active |
| O M E Construction Inc | C10 + B | 2017 | Active |
| Ocd Electric Inc | C10 | 2024 | Active |
| Ohanes Electric Inc | C10 | 2017 | Active |
| Oli Electric Inc | C10 | 2017 | Active |
| Omeg Electric Inc | C10 | 1994 | Active |
| One54 Electric | C10 | 2026 | Active |
| Orbit Wiring Electric Systems Inc | C10 | 2023 | Active |
| Oren Development Group Inc | C10 + B | 2026 | Active |
| P And A Electrical Contractors | C10 + C36 | 2011 | Active |
| P T S Solutions Inc | C10 + C7 | 2002 | Active |
| P W One Electric Inc | C10 | 2009 | Active |
| Pacific Construction & Development Inc | C10 + B | 2023 | Active |
| Pacific Electric Ca Inc | C10 | 2022 | Active |
| Pacific Electrical Services Inc | C10 | 2020 | Active |
| Pacific Gold Electric Inc | C10 | 2005 | Active |
| Pacific Southern Development Inc | C10 + B | 2006 | Active |
| Palmer Residential Electric Inc | C10 | 2025 | Active |
| Paxtor Electric Inc | C10 | 2026 | Active |
| Perez Construction & Pipelines Inc | C10 + A, B, C36 +1 | 2019 | Active |
| Phase III Design-Electric Inc | C10 | 2026 | Active |
| Philmont Management Inc | C10 + A, B, C16 +2 | 2002 | Active |
| Pineda Energy Solutions | C10 + B | 2025 | Active |
| Pong D A Construction Inc | C10 + B | 2015 | Active |
| Powell Electric | C10 | 1991 | Active |
| Power Electric & Construction Inc | C10 + B | 2010 | Active |
| Power Up Electric | C10 | 1983 | Active |
| Powerfix Energy Solutions | C10 + C46 | 2018 | Active |
| Powerfull Electric Inc | C10 | 1999 | Active |
| Powerfull Solar Inc | C10 | 2022 | Active |
| Powerfull Systems Inc | C10 | 2010 | Active |
| Precise Air Systems Inc | C10 + C20, C46 | 1982 | Active |
| Precision Network Solutions LP | C10 + C7 | 2013 | Active |
| Preferred Electric | C10 | 2004 | Active |
| Premium Energy Solutions Inc | C10 | 2007 | Active |
| Premium Power And Lighting Inc | C10 | 2026 | Active |
| Prenik LLC | C10 + B | 1983 | Active |
| Prime Charge Electric Inc | C10 | 2018 | Active |
| Prime Electrical Solutions Inc | C10 | 2018 | Active |
| Primestone Construction Inc | C10 + B, C36 | 2026 | Active |
| Primevolt Power & Lighting | C10 | 2025 | Active |
| Pro-Amp Electric Inc | C10 | 2016 | Renew by Nov 30, 2026 |
| Proffessional Electric Services | C10 | 2026 | Active |
| Project: Automate | C10 + C7 | 2012 | Active |
| Proper Electric Inc | C10 | 2020 | Renew by Dec 31, 2026 |
| Property Retrofit | C10 + B | 2011 | Active |
| PV Worldtech General Contractor | C10 + B | 2022 | Active |
| Quality Electrical Services Inc | C10 | 2018 | Active |
| R A G Electric Inc | C10 | 1987 | Active |
| R F Electric Inc | C10 | 2001 | Active |
| R M B Electrical Service Inc | C10 | 2023 | Active |
| R M C Construction Electric Inc | C10 + B, C36 | 2011 | Active |
| R M Electric | C10 | 2022 | Active |
| R&G Electric Services | C10 | 2026 | Active |
| Rad Com LLC | C10 | 1989 | Active |
| Radix Fire Protection Inc | C10 + C16 | 2003 | Active |
| Rak Electrical Inc | C10 | 2026 | Active |
| Ram Construction & Electrical | C10 + B | 2020 | Active |
| Reairco Air Conditioning Service | C10 + C20 | 2015 | Active |
| Reliable Electrical Service | C10 | 2026 | Active |
| Remodeling & Redevelopment Incorporated | C10 + B | 1979 | Active |
| Ricardo's Electric Services, Inc | C10 | 2022 | Active |
| Right Electrical Solutions | C10 | 2025 | Active |
| Riveraz Electric | C10 | 2022 | Active |
| Robnett Electric Inc | C10 | 1987 | Active |
| Rodas D Electrical Corp | C10 | 2025 | Active |
| Rodulfo's Master Builder Construction | C10 + B | 2016 | Active |
| Romans Gesheft Inc | C10 | 2023 | Active |
| Rory Electric Inc | C10 | 1993 | Active |
| RT Electric Contractors | C10 | 2022 | Active |
| RVC Electric Inc | C10 | 2019 | Active |
| S & F Electric | C10 | 2003 | Active |
| S K Cooling Inc | C10 + B, C20, C36 | 2016 | Renew by Nov 30, 2026 |
| Saav Eli Electric | C10 | 2022 | Renew by Nov 30, 2026 |
| Safeguard Alarm & Electrical Corp | C10 | 1992 | Active |
| Sals 4s Electrical Inc | C10 | 2024 | Active |
| Samwon Construction | C10 + A, B, C20 +4 | 2005 | Active |
| Sautman Steve Electric Inc | C10 + B, C20 | 1977 | Active |
| SCS Group Inc | C10 | 2024 | Active |
| Sea Pac Engineering Inc | C10 + A, B, C20 +2 | 1993 | Active |
| Service Pro Restoration Inc | C10 + B, C36 | 2016 | Active |
| Seven Electric Inc | C10 | 2006 | Active |
| Shaffer Construction Inc | C10 + A, B | 2014 | Active |
| Shimoni Aharon Electric Inc | C10 | 1980 | Active |
| Shine Electric Company | C10 | 2024 | Active |
| Shorty Electric Inc | C10 | 2019 | Active |
| Siboni Development & Design Inc | C10 + B | 2022 | Active |
| Sigma C & S Electric LLC | C10 | 2022 | Active |
| Silva Electric Inc | C10 | 1985 | Active |
| Simple Construction | C10 + B | 2025 | Active |