| NMNonferrous Metals INC | Seattle | — | ◇ UNVERIFIED |
| NMNorthern Marine Site | Anacortes | — | ◇ UNVERIFIED |
| NCNorthwest Castings | Seattle | — | ◇ UNVERIFIED |
| PCPacific Car and Foundry CO | Renton | — | ◇ UNVERIFIED |
| PDPacific Die Casting | Vancouver | — | ◇ UNVERIFIED |
| P7Parcel 77 Auto Import Terminal | Tacoma | — | ◇ UNVERIFIED |
| PDPentz Design Pattern and Foundry INC | Duvall | — | ◇ UNVERIFIED |
| RERoemer Electric Steel Foundry | Longview | — | ◇ UNVERIFIED |
| SBSalmon Bay Steel Company | Kent | — | ◇ UNVERIFIED |
| SASeacast Arlington LLC | Arlington | — | ◇ UNVERIFIED |
| TFThe Foundry INC | Mead | — | ◇ UNVERIFIED |
| UWUnitized West | Chehalis | — | ◇ UNVERIFIED |
| UCUS Castings LLC | Entiat | — | ◇ UNVERIFIED |
| VPVancouver Port Lower River | Vancouver | — | ◇ UNVERIFIED |
| WIWagstaff INC | Spokane | — | ◇ UNVERIFIED |
| WWWalla Walla Foundry | Walla Walla | — | ◇ UNVERIFIED |
| WSWestern Steel Casting CO | Seattle | — | ◇ UNVERIFIED |
| WTWeyerhaeuser Technology Center | Federal Way | — | ◇ UNVERIFIED |
| ARATI - Richland Operation | Richland | 100–499 | ◐ LIKELY ACTIVE |
| KAKaiser Aluminum Richland | Richland | 20–99 | ◐ LIKELY ACTIVE |
| KAKaiser Aluminum - Trentwood | Spokane Valley | 500+ | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba SeaTac Steel Mill and Recycling Services | Seattle | 1–19 | ◐ LIKELY ACTIVE |
| MUMPG US Kent | Kent | 20–99 | ◐ LIKELY ACTIVE |
| NSNucor Steel Seattle INC. | Seattle (SEA) | 100–499 | ◐ LIKELY ACTIVE |
 Nwpx Infrastructure, INC. | Vancouver | — | ◐ LIKELY ACTIVE |
| RSRec Silicon INC | Moses Lake | — | ◐ LIKELY ACTIVE |
 Richards Pipe & Steel, INC. | Pacific | — | ◐ LIKELY ACTIVE |
| SISeaCast Inc - Seattle | Marysville | 20–99 | ◐ LIKELY ACTIVE |
| SISpokane Industries | Spokane Valley | 100–499 | ◐ LIKELY ACTIVE |
| SESynchronized Enterprises, INC. | Puyallup | — | ◐ LIKELY ACTIVE |
| VMVulan Metals Corporation | Tacoma | 100–499 | ◐ LIKELY ACTIVE |
| WMWa317943601 - Mackenzie Castings LLC | Arlington | — | ◇ UNVERIFIED |
| AIAce Iron Works | Seattle | — | ◇ UNVERIFIED |
| AMAgco Metalex | Mukilteo | — | ◇ UNVERIFIED |
| ARAluminum Recycling Trentwood | Spokane Valley | — | ◇ UNVERIFIED |
| APAmerican Pole Structures LLC | Sedro Woolley | — | ◇ UNVERIFIED |
| APAmerican Powderworks Inc | Lynnwood | — | ◇ UNVERIFIED |
| ASAmerican Structures & Design Inc. | Pacific | — | ◇ UNVERIFIED |
| BPBallard Pattern and Brass Foundry | Seattle | — | ◇ UNVERIFIED |
| BFBergstrom Foundry INC | Aberdeen | — | ◇ UNVERIFIED |
| BCBlue Castings | Arlington | — | ◇ UNVERIFIED |
| CMCashmere Manufacturing East Wenatchee | East Wenatchee | — | ◇ UNVERIFIED |
| CMCastle Metals | Kent | — | ◇ UNVERIFIED |
| CQChelan Quality Welding, LLC | Cashmere | — | ◇ UNVERIFIED |
| EAEvergreen Aluminum LLC Dba Vanalco INC | Vancouver | — | ◇ UNVERIFIED |
| FFFoust Fabrication Co | Colville | — | ◇ UNVERIFIED |
| GRGreenbrier Rail Services Tacom | Tacoma | — | ◇ UNVERIFIED |
| HIHot Iron Fabrication LLC | Federal Way | — | ◇ UNVERIFIED |
| IFInland Fndy CO INC | Mead | — | ◇ UNVERIFIED |
| ICIsla Carmen LLC | Vancouver | — | ◇ UNVERIFIED |
