| Schill Electric Co | EC | Active |
| Sear Electric LLC | EC | Active |
| Seem Electric, LLC | EC | Active |
| Servtech Electric Co. | EC | Renew by Dec 30, 2026 |
| Sice Inc | EC | Active |
| Sidney Carter Electric | EC | Active |
| Signad LTD | EC | Active |
| Signature Electric Services LLC | EC | Renew by Dec 21, 2026 |
| Silva Tech Electric | EC | Active |
| Sinewave Electric Co | EC | Active |
| Singleton Electrical Solutions LLC | EC | Active |
| Sitewide Project Solutions | EC | Active |
| Skyline Voltage LLC | EC | Active |
| Skylite Electric Services LLC | EC | Active |
| SLR Lighting Solutions LLC | EC | Active |
| Smart And Quality Construction LLC | EC | Active |
| Smart Choice Electrical Services | EC | Active |
| Smart Solutions Enterprise LLC | EC | Active |
| Smatech Electric | EC | Active |
| Snag Electric LLC | EC | Renew by Dec 19, 2026 |
| Soap Engineering LLC | EC | Active |
| Solar 820 LLC | EC | Renew by Dec 11, 2026 |
| Solar Sandhu Inc | EC | Active |
| Solivance Electric LLC | EC | Active |
| Solstice Solar LLC | EC | Active |
| Solution Electric | EC | Active |
| Son Houston Electrical LLC | EC | Active |
| Sonlight Electric, Inc. | EC | Active |
| Sosa Electric Co LLC | EC | Active |
| Sotex Electric | EC | Renew by Dec 9, 2026 |
| South Central Electric LLC | EC | Active |
| South Texas HVAC & Electric | EC | Active |
| Southeast Electric | EC | Active |
| Southern Electrical Services Inc | EC | Active |
| Southern Voltage Electric Service LLC | EC | Active |
| Southwestern Electrical | EC | Renew by Nov 19, 2026 |
| Space City Electric LLC | EC | Active |
| Space City Electrical Services | EC | Active |
| Space City Solar, Llc. | EC | Renew by Nov 21, 2026 |
| Spark Lighting LLC | EC | Active |
| Square Electrical Solutions LLC | EC | Active |
| SRG Electrical Solutions LLC | EC | Renew by Nov 12, 2026 |
| SSM Truckco 2 LLC | EC | Active |
| SSM Truckco LLC | EC | Renew by Nov 26, 2026 |
| Star Service, Inc. | EC | Active |
| Starrone Electrical Services LLC | EC | Active |
| Stars & Gears Electric | EC | Active |
| Stay Connected Electrical Services LLC | EC | Active |
| Stingray Home & Commercial Services, LLC | EC | Renew by Nov 6, 2026 |
| Stirling Electric | EC | Active |
| Stovall Electrical Services | EC | Active |
| STP Services | EC | Active |
| Stribling & Stribling Enterprises LLC | EC | Active |
| Stronghold Electric LLC | EC | Active |
| STX Electrical Consulting & Design LLC | EC | Active |
| Summit Industrial Construction LLC | EC | Active |
| Sun4 Inc DBA Sunprise | EC | Active |
| Sunshine Electric&Construction SVCS LLC | EC | Active |
| Sunshine Renewable Solutions LLC | EC | Active |
| Superb Electric LLC | EC | Renew by Dec 9, 2026 |
| Superior Electric | EC | Active |
| Superior One Electric | EC | Active |
| Sure Thing Services | EC | Active |
| Swartz Green Electric LLC | EC | Active |
| Swisher Services, LLC | EC | Active |
| T & J Electric | EC | Active |
| T & T Electric | EC | Renew by Nov 26, 2026 |
| T And A Electrical Solution LLC | EC | Active |
| T L Industries | EC | Active |
| T&T Electric Co | EC | Active |
| T&Z All Services, L.P. | EC | Active |
| Tag Electric Company, LP | EC | Active |
| Tap Electric | EC | Active |
| Tas Energy Inc | EC | Active |
| Tatan Electric LLC | EC | Active |
| Taylor Electric | EC | Active |
| Taylor Electrical Contractors Co | EC | Active |
| Tdb, Inc | EC | Active |
| Tex-Star Electric Inc | EC | Renew by Nov 1, 2026 |
| Texan Electric Co Inc | EC | Active |
| Texan Line Electric LLC | EC | Active |
| Texans Services | EC | Renew by Dec 13, 2026 |
| Texans Services One | EC | Renew by Dec 16, 2026 |
| Texas Current Solutions LLC | EC | Active |
| Texas Direct Solar LLC | EC | Active |
| Texas Electrical Residential Contractors | EC | Active |
| Texas Electrical Solutions | EC | Active |
| Texas Elite Electrical Company LLC | EC | Active |
| Texas Gem Electric LLC | EC | Active |
| Texas Master Electric Corp | EC | Active |
| Texas Sign Makers LLC | EC | Active |
| Texasrise Power Solutions LLC | EC | Active |
| Texpro Systems LLC | EC | Active |
| Texserv Electric LLC | EC | Active |
| Texsun Electric | EC | Active |
| The 3rd Electrical Contractor Inc | EC | Active |
| The Centsible Solutions Group | EC | Renew by Nov 5, 2026 |
| The Rice-Tinsley Corp | EC | Active |
| The Wright Electrician | EC | Active |
| Thermal Volt Inc | EC | Active |