| SESchweitzer Engineering Labs | Pullman | WA | Electrical Equipment, Appliance & Component Manufacturing335314 | — | ◇ UNVERIFIED |
| SASenior Aerospace Absolute Manufacturing | Arlington | WA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| SIServatron INC Spokane Valley | Spokane Valley | WA | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| SASgl Automotive Carbon Fibers LLC | Moses Lake | WA | Chemical Manufacturing325220 | — | ◇ UNVERIFIED |
| SFSimplot Frozen Vegetables, LLC. | Pasco | WA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| TSTemtco Steel Tumwater | Tumwater | WA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| TTTree Top Incorporated | Selah | WA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| TTTree Top Wenatchee Plant | Wenatchee | WA | Food Manufacturing311423 | — | ◇ UNVERIFIED |
| TSTrim Systems LLC Vancouver | Vancouver | WA | Food Manufacturing311340 | — | ◇ UNVERIFIED |
| UVUtility Vault | Auburn | WA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| WSWenatchee Sandg Batch Plant | Wenatchee | WA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| YBYakima Bait Company Wordens Lure | Granger | WA | Miscellaneous Manufacturing339920 | — | ◇ UNVERIFIED |
| ALAdpro Litho INC | Mukilteo | WA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| AWAmerican West Chrome INC | Spokane | WA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| IMIrongate Machine | Bellingham | WA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| IGIron Goat Brewing | Spokane | WA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| MSManufacturing Services | Kennewick | WA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| OPOlympus Press INC | Seattle | WA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SGScott Galvanizing Site | Seattle | WA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| STStar Transport Trailers INC | Sunnyside | WA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| TThermaline | Auburn | WA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| 5U51 University Building | Seattle | WA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| 8E8801 E Marginal Way S | Tukwila | WA | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| 9I999 INC | Pasco | WA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| AAA and J Custom Cabinets INC | Vancouver | WA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| ABA & B Asphalt Benton City Cedar Rapids | Benton City | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ACAbitibi Consolidated Site | Steilacoom | WA | Paper Manufacturing322122 | — | ◇ UNVERIFIED |
| ABAccess Business Group LLC Quincy | Quincy | WA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AMAccra Manufacturing | Bothell | WA | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
 Accurate Industries | Auburn | WA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| APAce Paving CO INC Johns Prairie Pit | Shelton | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| APAce Paving Schilinger Pit Plant 4 | Belfair | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ALAcu Line CORP Mukilteo | Mukilteo | WA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| AMAdmiral Marine Works Site | Port Angeles | WA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
 Advanced Drainage Systems INC | Washougal | WA | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| ACAero Controls Incorporated | Shelton | WA | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| AAeroforge | Puyallup | WA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| AAeroform | Arlington | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| ALAero Lac INC | Seattle | WA | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
 Aero Precision Commerce | Tacoma | WA | Fabricated Metal Product Manufacturing332994 | — | ◇ UNVERIFIED |
| Aero Precision Lakewood | Lakewood | WA | Fabricated Metal Product Manufacturing332994 | — | ◇ UNVERIFIED |
| ACAerostructures CORP the | Everett | WA | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| ATAgilent Technologies Site | Liberty Lake | WA | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| AAAim Aerospace 1517 Building | Auburn | WA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AAAim Aviation Auburn INC W Valley | Auburn | WA | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| AGAirco Gases Div of Boc Seattle | Seattle | WA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| ACAirgas Carbonic INC Sip | Spokane | WA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| APAir Products Manufacturing CORP | Puyallup | WA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| AAAka Airway Pit | Airway Heights | WA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAlaskan Copper & Brass CO Ctl | Seattle | WA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
