| IInterpoint | Redmond | WA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| IMIslands Marine Center | Lopez Island | WA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| IIIvey Imaging LLC Seattle | Seattle | WA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| JIJanicki Industries INC Sedro Woolley | Sedro Woolley | WA | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| JCJ Calman Industries | Lynden | WA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| JWJeld Wen Coatings Tukwila | Tukwila | WA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| JYJesse Yard Ii | Tacoma | WA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| JDJl Darling CORP | Tacoma | WA | Paper Manufacturing322222 | — | ◇ UNVERIFIED |
| JEJm Eagle Tacoma | Tacoma | WA | Plastics and Rubber Products Manufacturing326122 | — | ◇ UNVERIFIED |
| JMJm Martinac Shipbuilding CORP | Tacoma | WA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| JIJohn I Haas INC Hop Extraction Support F | Yakima | WA | Food Manufacturing311900 | — | ◇ UNVERIFIED |
| JFJohnson Foods Blaine Ave | Sunnyside | WA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| JFJohnson Foods INC | Sunnyside | WA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| JIJustesen Industries | Blaine | WA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| KCK2 Corporation Site | Vashon | WA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| KRKangas Road Project | Toledo | WA | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| KIKelley Imaging Systems | Kent | WA | Transportation Equipment Manufacturing336991 | — | ◇ UNVERIFIED |
| KFKellys Furniture Refinishing | Lynnwood | WA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| KWKemira Water Solutions INC Longview | Longview | WA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| KMKersey Mobility | Redmond | WA | Printing and Related Support Activities323122 | — | ◇ UNVERIFIED |
| KCKimberly Clark Worldwide | Everett | WA | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| KCKing County Brightwater Wwtp | Woodinville | WA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| KPKitchen Plus Cabinet Shop | Kirkland | WA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| KSKleenco Site | Kent | WA | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| KMKlw Manufacturing and Design | Arlington | WA | Fabricated Metal Product Manufacturing332322 | 1-19 | ◇ UNVERIFIED |
| KBKona Bicycle Company | Ferndale | WA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| KLKp LLC | Renton | WA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| KPK Ply | Port Angeles | WA | Wood Product Manufacturing321211 | — | ◇ UNVERIFIED |
| KIKyocera International | Vancouver | WA | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| LWLabels West | Woodinville | WA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| LQLake Quinault School | Amanda Park | WA | Food Manufacturing311712 | — | ◇ UNVERIFIED |
| LILakeside Industries Aberdeen | Aberdeen | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LILakeside Industries Issaquah 032 | Issaquah | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LILakeside Industries Little Monroe | Monroe | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LILakeside Industries Olympia Airport | Olympia | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LCLakewood City Muni Sw | Lakewood | WA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| LWLamb Weston Bsw | Warden | WA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| LMLamiglas Manufacturing INC | Woodland | WA | Miscellaneous Manufacturing339920 | 20-99 | ◇ UNVERIFIED |
| LILancs Industries INC | Kirkland | WA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◇ UNVERIFIED |
| LBLandscape Bark | Tacoma | WA | Food Manufacturing311611 | — | ◇ UNVERIFIED |
| LILavinal INC | Cle Elum | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LPLawton Printing | Spokane | WA | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |
| LMLeavitt Machinery | Tukwila | WA | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| LTLeduc Transportation INC | Vancouver | WA | Fabricated Metal Product Manufacturing332420 | — | ◇ UNVERIFIED |
| LCLehigh Cement CO | Metaline Falls | WA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| LBLime Bike | Seattle | WA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| LELloyd Electric Apparatus CO | Seattle | WA | Electrical Equipment, Appliance & Component Manufacturing335314 | — | ◇ UNVERIFIED |
| LILloyd Industries | Spokane | WA | Fabricated Metal Product Manufacturing332214 | — | ◇ UNVERIFIED |
| LLLloyd Logging Mack Lloyd Pit | Winthrop | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LTLoud Technologies | Woodinville | WA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
