| LBLP Body Shop INC | Yakima | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LBLumbermens Building Center Kennewick | Kennewick | WA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| LILyell Immunopharma INC Bothell | Bothell | WA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| LPLynnwood Plating | Lynnwood | WA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MDMac Donald Miller Facility Solutions | Seattle | WA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MTMacro Technology | Kirkland | WA | Electrical Equipment, Appliance & Component Manufacturing335122 | — | ◇ UNVERIFIED |
| MBMarco Building | Seattle | WA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| MFMarine Floats CORP | Tacoma | WA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MIMarine Industries Nw State | Tacoma | WA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| MVMarine Vacuum Service INC | Seattle | WA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| MBMarketing By Design | Spokane | WA | Computer and Electronic Product Manufacturing334112 | — | ◇ UNVERIFIED |
| MPMarq Packaging Ii LLC | Yakima | WA | Machinery Manufacturing333993 | — | ◇ UNVERIFIED |
| MHMars Hill Properties 50th LLC | Seattle | WA | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| MSMasons Supply Company | Seattle | WA | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| MPMaverik Pasco | Pasco | WA | Machinery Manufacturing333913 | — | ◇ UNVERIFIED |
| MSMaverik Store 448 | Richland | WA | Machinery Manufacturing333913 | — | ◇ UNVERIFIED |
| MBMayr Bros Lumber Hoquiam Site | Hoquiam | WA | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| MTMce Technologies INC | Seattle | WA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MPMds Pharma Services | Bothell | WA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| MDMercer Distribution Facility | Seattle | WA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| MFMetal Finishing Arlington | Arlington | WA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MFMetal Finishing Incorporated | Marysville | WA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MPMeta Platforms Technologies LLC Red9845 Origin | Redmond | WA | Computer and Electronic Product Manufacturing334515 | — | ◇ UNVERIFIED |
| MMetrie | Ferndale | WA | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| MTMicrochip Technology INC Puyallup | Puyallup | WA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| MRMicrosoft Redmond 17760 Facility | Redmond | WA | Machinery Manufacturing333923 | — | ◇ UNVERIFIED |
| MAMidwest Air Technologies | Lakewood | WA | Plastics and Rubber Products Manufacturing326100 | — | ◇ UNVERIFIED |
| MGMikron G Building | Kent | WA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MMMilgard Manufacturing INC Fiberglass | Fife | WA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| MWMilgard Woodclad Division | Tacoma | WA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MAMiller and Miller Boatyard CO INC | Seattle | WA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| MMMiller Manufacturing | Washougal | WA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| MTMitchell Trucking and Paving Mitchell | Orondo | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MUMitsui-soko USA | Puyallup | WA | Electrical Equipment, Appliance & Component Manufacturing335991 | — | ◇ UNVERIFIED |
| MDModern Door and Millwork INC | Tacoma | WA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass Northwest Site | Stevenson | WA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MMonierlifetile | Tacoma | WA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| MMMutual Materials CO Newcastle | Bellevue | WA | Nonmetallic Mineral Product Manufacturing327121 | — | ◇ UNVERIFIED |
| NTNanostring Technologies | Seattle | WA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| NFNational Frozen Foods CORP | Chehalis | WA | Food Manufacturing311421 | — | ◇ UNVERIFIED |
| NFNational Frozen Foods CORP Moses Lake | Moses Lake | WA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| NTNewcold Tacoma | Tacoma | WA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| NYNewport Yacht Basin | Bellevue | WA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| NPNlight Photonics | Vancouver | WA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| NNNoll Norwesco LLC | Fife | WA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| NBNordlund Boat CO D St | Tacoma | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NBNordlund Boat CO INC Tacoma | Tacoma | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NBNordlund Boat Company | Tacoma | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NTNorms Truck and Equipment | Pacific | WA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| NBNorth Boeing Field Georgetown Steamplant | Seattle | WA | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
