| STSystima Technologies INC | Mukilteo | — | ◐ LIKELY ACTIVE |
| AAApplied Aero Systems | Mukilteo | — | ◐ LIKELY ACTIVE |
| CSCbi Services | Everett | — | ◐ LIKELY ACTIVE |
| KCKing County Brightwater Wwtp | Woodinville | — | ◐ LIKELY ACTIVE |
| MMModumetal Maltby Site | Snohomish | — | ◐ LIKELY ACTIVE |
| QCQueen City Plating INC | Mukilteo | — | ◐ LIKELY ACTIVE |
| SHSilver Horde Fishing Supplies, INC. | Mukilteo | — | ◐ LIKELY ACTIVE |
| ABAmerican Boiler Works | Arlington | — | ◇ UNVERIFIED |
Blue Streak Finishers, Plant 1 Site | Everett | — | ◇ UNVERIFIED |
| CICalvert Industries | Snohomish | — | ◇ UNVERIFIED |
| CPCemco Products Site | Everett | — | ◇ UNVERIFIED |
| CMCoastal Manufacturing | Everett | — | ◇ UNVERIFIED |
| DIDunlap Industrial Hardware | Everett | — | ◇ UNVERIFIED |
| EBElectroimpact Building G | Mukilteo | — | ◇ UNVERIFIED |
| GBG B Enterprises Arlington | Arlington | — | ◇ UNVERIFIED |
| LPLynnwood Plating | Lynnwood | — | ◇ UNVERIFIED |
| MFMetal Finishing Arlington | Arlington | — | ◇ UNVERIFIED |
| MFMetal Finishing Incorporated | Marysville | — | ◇ UNVERIFIED |
| NMNorth Marina Bayside Abw Site | Everett | — | ◇ UNVERIFIED |
| PPProduction Plating INC Powdercoat Facili | Mukilteo | — | ◇ UNVERIFIED |
| SSSuper Surface Techna | Mukilteo | — | ◇ UNVERIFIED |
| AMAbsolute Manufacturing | Arlington | 20–99 | ◐ LIKELY ACTIVE |
| AMAeroMotion Monroe | Monroe | 20–99 | ◐ LIKELY ACTIVE |
| CTColee Technic LLC | Lynnwood | — | ▲ REPORTED CLOSED |
| CTColor Tech | Mountlake Terrace | 20–99 | ◐ LIKELY ACTIVE |
| CICrystalite Inc. | Everett | 20–99 | ◐ LIKELY ACTIVE |
| DDD & D Welding, INC. | Mukilteo | — | ◐ LIKELY ACTIVE |
Dogwood Industries-Everett | Everett | 20–99 | ◐ LIKELY ACTIVE |
| EDEpoch Design LLC | Arlington | — | ◐ LIKELY ACTIVE |
| HNHormann Northwest Door LLC - Marysville | Marysville | 1–19 | ◐ LIKELY ACTIVE |
| IFInfinity Fabrication, INC. | Marysville | — | ◐ LIKELY ACTIVE |
| IMIsland Machine, INC | Everett | — | ◐ LIKELY ACTIVE |
| MMMilltown Marine Designs LLC | Everett | — | ◐ LIKELY ACTIVE |
| NGNIC Global-Corporate Headquarters | Woodinville | 100–499 | ◐ LIKELY ACTIVE |
| QMQuality Manufacturing Solutions, LLC | Arlington | — | ◐ LIKELY ACTIVE |
| RMReliance Manufacturing Corporation | Woodinville | — | ◐ LIKELY ACTIVE |
| RMReliance Mfg Corporation | Woodinville | 20–99 | ◐ LIKELY ACTIVE |
Romac Industries, Inc. Canyon Park | Bothell | 100–499 | ◐ LIKELY ACTIVE |
| TDTecton Dynamics LLC | Marysville | — | ◐ LIKELY ACTIVE |
Zappbug, INC. | Edmonds | — | ◐ LIKELY ACTIVE |
| AMAcro Machining | Marysville | — | ◇ UNVERIFIED |
| JRJoes Racing Products | Everett | — | ◇ UNVERIFIED |
| KMKlw Manufacturing and Design | Arlington | — | ◇ UNVERIFIED |
| WAWa317946455 - Advantage Manufacturing Technologies INC | Monroe | — | ◇ UNVERIFIED |
| WDWa317947384 - Dci Metal Finishing LLC | Everett | — | ◇ UNVERIFIED |
| AMAbsolute Mfg Main | Arlington | — | ◇ UNVERIFIED |
| ABAeromotion By Textron Aviation | Monr | — | ◇ UNVERIFIED |
| ASAerotech Stripping LLC | Marysville | — | ◇ UNVERIFIED |
| BHBCK Holdings LLC | Marysville | — | ◇ UNVERIFIED |
| BMBirdwell Machine LLC Everett | Everett | — | ◇ UNVERIFIED |