| JMJm Martinac Shipbuilding CORP | Tacoma | — | ◇ UNVERIFIED |
| KIKelley Imaging Systems | Kent | — | ◇ UNVERIFIED |
| MBMarco Building | Seattle | — | ◇ UNVERIFIED |
| MFMarine Fluid Systems INC | Seattle | — | ◇ UNVERIFIED |
| MIMarine Industries Nw State | Tacoma | — | ◇ UNVERIFIED |
| MHMars Hill Properties 50th LLC | Seattle | — | ◇ UNVERIFIED |
| MSMasons Supply Company | Seattle | — | ◇ UNVERIFIED |
| NTNordic Tugs INC Huggins Airport Way | Burlington | — | ◇ UNVERIFIED |
| NBNordlund Boat CO D St | Tacoma | — | ◇ UNVERIFIED |
| NBNordlund Boat CO INC Tacoma | Tacoma | — | ◇ UNVERIFIED |
| NBNordlund Boat Company | Tacoma | — | ◇ UNVERIFIED |
| NTNorms Truck and Equipment | Pacific | — | ◇ UNVERIFIED |
| NBNorth Boeing Field Georgetown Steamplant | Seattle | — | ◇ UNVERIFIED |
| NYNorthcoast Yachts | Tacoma | — | ◇ UNVERIFIED |
| NBNorthwest Bedding | Spokane | — | ◇ UNVERIFIED |
| NMNorthwest Marine Industries | Ferndale | — | ◇ UNVERIFIED |
| OIOmada International Sumner Division | Sumner | — | ◇ UNVERIFIED |
| OBOsprey Boat Company Metcalf St | Sedro Woolley | — | ◇ UNVERIFIED |
| PBPaccar Building | Bellevue | — | ◇ UNVERIFIED |
| PNPetermann Northwest | Seattle | — | ◇ UNVERIFIED |
 Platypus Marine INC | Port Angeles | — | ◇ UNVERIFIED |
| PSPmo Sbct Stryker Brigade Combat Team | Sumner | — | ◇ UNVERIFIED |
| PAPort Angeles Marine INC | Port Angeles | — | ◇ UNVERIFIED |
| POPort of Ilwaco Boatyard and Marina | Ilwaco | — | ◇ UNVERIFIED |
| PEPrecision Engines LLC | Everett | — | ◇ UNVERIFIED |
| RBRendova Boats | Rochester | — | ◇ UNVERIFIED |
| RRResource Recycling Technologies | Seattle | — | ◇ UNVERIFIED |
| RHRoche Harbor Marine | Friday Harbor | — | ◇ UNVERIFIED |
 Safe Boats International Bremerton | Bremerton | — | ◇ UNVERIFIED |
| SPSeattle Port Fishermans Terminal | Seattle | — | ◇ UNVERIFIED |
| SPSeattle Port Maritime Industrial Cent | Seattle | — | ◇ UNVERIFIED |
| SBSeaview Boatyard West | Seattle | — | ◇ UNVERIFIED |
| SESeaview East Boatyard | Seattle | — | ◇ UNVERIFIED |
| SSSeven Seas Fishing CO | Seattle | — | ◇ UNVERIFIED |
| SPSouth Park Marina | Seattle | — | ◇ UNVERIFIED |
| SYStabbert Yacht and Ship LLC | Seattle | — | ◇ UNVERIFIED |
| SIStoddard International | Arlington | — | ◇ UNVERIFIED |
| SBSuldans Boat Works | Port Orchard | — | ◇ UNVERIFIED |
| TBTern Boats | Kent | — | ◇ UNVERIFIED |
| TBThe Boeing CO 24th Pl W | Everett | — | ◇ UNVERIFIED |
| TSThe Shipyard LLC | Hoquiam | — | ◇ UNVERIFIED |
| TJThunder Jet Boats | Clarkston | — | ◇ UNVERIFIED |
| TWTitus Will Enterprises INC | Tacoma | — | ◇ UNVERIFIED |
| TATollycraft Acquisition Corporation | Kelso | — | ◇ UNVERIFIED |
| TTTotal Truck Shop | Spokane | — | ◇ UNVERIFIED |
| TCTriumph Composite Systems INC | Spokane | — | ◇ UNVERIFIED |
| TATruck Accessories Group INC Pace Edwards | Centralia | — | ◇ UNVERIFIED |
| TTTulalip Test Site | Tulalip | — | ◇ UNVERIFIED |
 Tyee Aircraft Mckechnie Group | Everett | — | ◇ UNVERIFIED |
| UAUS Army Wsmc Pier 23 | Tacoma | — | ◇ UNVERIFIED |
