| Rank | Company | Overall Rank | City | State | Employees | Primary Market | Primary Service | Total Megawatts Installed | Total Megawatts 2016 |
|---|---|---|---|---|---|---|---|---|---|
| 1 | A&R Solar | 185.0 | Seattle | WA | 41.0 | Residential | Rooftop Contractor | 26,739.0 | 3.5 |
| 2 | Ellensburg Solar | 221.0 | Ellensburg | WA | 21.0 | Residential | Rooftop Contractor | 5.0 | 2.4 |
| 3 | Puget Sound Solar | 234.0 | Seattle | WA | 32.0 | Residential | Rooftop Contractor | 16,212.0 | 2.2 |
| 4 | SolTerra Solar | 258.0 | Seattle | WA | 101.0 | Residential | EPC | 9,491.2 | 1.7 |
| 5 | Sunergy Systems | 260.0 | Seattle | WA | 20.0 | Residential | Rooftop Contractor | 11,736.0 | 1.6 |
| 6 | NW Wind & Solar | 275.0 | Seattle | WA | 110.0 | Residential | EPC | 5.0 | 1.4 |
| 7 | AllCities Solar and Electric | 287.0 | Yakima | WA | 21.0 | Residential | EPC | 5,957.0 | 1.3 |
| 8 | Smart Energy Today | 296.0 | Olympia | WA | 110.0 | Residential | Rooftop Contractor | 12,782.0 | 1.2 |
| 9 | Artisan Electric | 301.0 | Seattle | WA | 30.0 | Residential | Rooftop Contractor | 8,164.0 | 1.2 |
| 10 | Western Solar | 311.0 | Bellingham | WA | 13.0 | Residential | Rooftop Contractor | 7.0 | 1.1 |
| 11 | Sunbridge Solar | 353.0 | Wsahougal | WA | 9.0 | Residential | Rooftop Contractor | 4,998.0 | 0.8 |
| 12 | South Sound Solar | 365.0 | Olympia | WA | 16.0 | Residential | EPC | 5,777.0 | 0.7 |
| 13 | Northwest Electric & Solar | 383.0 | Kenmore | WA | 32.0 | Residential | EPC | 3,978.0 | 0.6 |
| 14 | GC Solar | 415.0 | Bellevue | WA | 8.0 | Commercial | Rooftop Contractor | 2.0 | 0.4 |
| 15 | Solora Solar | 428.0 | Yakima | WA | 10.0 | Residential | Rooftop Contractor | 1.0 | 0.4 |
| 16 | Wray Industries | 472.0 | Ellensburg | WA | 6.0 | Residential | EPC | 0.6 | 0.2 |