| SFSpanish Fork Metals | Spanish Fork | UT | — | ◇ UNVERIFIED |
| SFSparta Foundry INC | Sparta | MI | — | ◇ UNVERIFIED |
| SLSpartech LLC | La Mirada | CA | — | ◇ UNVERIFIED |
| SFSpecialty Foundry | Brockton | MA | — | ◇ UNVERIFIED |
| SFSpecified Fittings INC | Bellingham | WA | — | ◇ UNVERIFIED |
| SFSpitz Foundry INC | Hastings | NE | — | ◇ UNVERIFIED |
| SISplay, INC. Dba Mos Plastics | San Jose | CA | — | ◇ UNVERIFIED |
| SPSpm Portland Site | Hillsboro | OR | — | ◇ UNVERIFIED |
| SCSpring City Elec/spring City | Spring City | PA | — | ◇ UNVERIFIED |
| SISpringfield Iron Works INC | Chicopee | MA | — | ◇ UNVERIFIED |
| SFS-r Finishing-div Siegel-robert INC | Portageville | MO | — | ◇ UNVERIFIED |
| SCStainless City, INC. | Port Canaveral | FL | — | ◇ UNVERIFIED |
 Stang Industries INC | Corona | CA | — | ◇ UNVERIFIED |
| SPStanton Plant | Stanton | TX | — | ◇ UNVERIFIED |
| SBStar Boards INC -star Boards INC | North Kansas City | MO | — | ◇ UNVERIFIED |
| SPStar Plastic INC. | Harbor City | CA | — | ◇ UNVERIFIED |
| SLState Line Foundries INC | Roscoe | IL | — | ◇ UNVERIFIED |
| SFStaver Foundry CO | Virginia | MN | — | ◇ UNVERIFIED |
| SCSterling Casting | Bluffton | IN | — | ◇ UNVERIFIED |
| STSterling Technologies, INC. | Lake City | PA | — | ◇ UNVERIFIED |
| SMSteven M. Saldivar | San Jose | CA | — | ◇ UNVERIFIED |
| STStreuter Technologies INC | San Clemente | CA | — | ◇ UNVERIFIED |
| SFSturgis Foundry Corporation | Sturgis | MI | — | ◇ UNVERIFIED |
| SPSuburban Plastics Company | Broadview | IL | — | ◇ UNVERIFIED |
| SESumitomo Electric Wiring Systems INC | Scottsville | KY | — | ◇ UNVERIFIED |
| SPSummit Polymers, INC | Columbia | MO | — | ◇ UNVERIFIED |
| SPSummit Polymers Inc-summit Polymers INC | Columbia | MO | — | ◇ UNVERIFIED |
| SFSun Fiberglass Products, INC. | Brooksville | FL | — | ◇ UNVERIFIED |
| SSSunland Shutters | Long Beach | CA | — | ◇ UNVERIFIED |
| SLSunneday, LLC | Pawnee City | NE | — | ◇ UNVERIFIED |
| SBSuperior Bronze CORP | Erie | PA | — | ◇ UNVERIFIED |
| SMSupervac Manuf. | Broomfield | CO | — | ◇ UNVERIFIED |
| SSutrak | Lamar | CO | — | ◇ UNVERIFIED |
| SCSynehi Casting | Greenwood | SC | — | ◇ UNVERIFIED |
| SLSypectlon Lab INC | Fremont | CA | — | ◇ UNVERIFIED |
| TCTalladega Castings & Machine CO INC | Talladega | AL | — | ◇ UNVERIFIED |
| TITam International INC | Houston | TX | — | ◇ UNVERIFIED |
| TFTampa Fiberglass, INC. | Tampa | FL | — | ◇ UNVERIFIED |
| TPTarget Plastics INC | Salem | OR | — | ◇ UNVERIFIED |
| TMTarheel Marble CO INC | Midland | NC | — | ◇ UNVERIFIED |
| TFT&b Foundry Company | Cleveland | OH | — | ◇ UNVERIFIED |
| TDTechnifoam Division of P I INC | Ferrum | VA | — | ◇ UNVERIFIED |
| TCTe Connectivity | Menlo Park | CA | — | ◇ UNVERIFIED |
| TSTemple South Plant | Temple | TX | — | ◇ UNVERIFIED |
| TCTenex CORP | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| TSTerrapin Spa Covers, LLC | Burnet | TX | — | ◇ UNVERIFIED |
| TETerrell Enterprises, INC. | Greenville | AL | — | ◇ UNVERIFIED |
| TFTexas Foundaries | Lufkin | TX | — | ◇ UNVERIFIED |
| TOTexas Outdoor Cookers, LLC | Willow City | TX | — | ◇ UNVERIFIED |
| TDThales Dis USA INC / Montgomeryville | Montgomeryville | PA | — | ◇ UNVERIFIED |
| TBThe Blanchester Foundry CO | Blanchester | OH | — | ◇ UNVERIFIED |
| TCThe Cooksey CORP / Shear-loc Prod | Laguna Hills | CA | — | ◇ UNVERIFIED |
| TFThe Foundry INC | Mead | WA | — | ◇ UNVERIFIED |
| TGThe General Casting Company - Toledo Street | Delaware | OH | — | ◇ UNVERIFIED |
| TGThe Glass Hand, INC. | Cleves | OH | — | ◇ UNVERIFIED |
| TFTherma Foam | Fort Worth | TX | — | ◇ UNVERIFIED |
| TPThermo Plastics Corporation | Fort Worth | TX | — | ◇ UNVERIFIED |
| TSThe Shredder Company | Canutillo | TX | — | ◇ UNVERIFIED |
 The Winsford Corporation Dba Forbes Industries | Ontario | CA | — | ◇ UNVERIFIED |
| TPThreaded Products CO | Richmond | MI | — | ◇ UNVERIFIED |
| TPThreaded Products CO | Richmond | MI | — | ◇ UNVERIFIED |
| TBThunder Bay Foundry | Alpena | MI | — | ◇ UNVERIFIED |
| TMTiffany Marble | Lees Summit | MO | — | ◇ UNVERIFIED |
| TSTitanium Specialties | Taft | CA | — | ◇ UNVERIFIED |
| TFTomahawk Foundary, INC | Rice Lake | WI | — | ◇ UNVERIFIED |
| TPTompkins Point Industrial Park LLC | Newark | NJ | — | ◇ UNVERIFIED |
| TKTool King INC | Wheeling | IL | — | ◇ UNVERIFIED |
| TDTop Die Casting CO | Marengo | IL | — | ◇ UNVERIFIED |
 Travis Pattern Foundry | Spokane Valley | WA | — | ◇ UNVERIFIED |
| TITree Island Steel Dba Tree Island Wire USA INC | San Bernardino | CA | — | ◇ UNVERIFIED |
| TSTrelleborg Sealing Solutions El Segundo INC | El Segundo | CA | — | ◇ UNVERIFIED |
| TITrexel International, INC. | Woburn | MA | — | ◇ UNVERIFIED |
| TPTri-mack Plastic Mfg. CORP | Bristol | RI | — | ◇ UNVERIFIED |
| TTTriseal, Tekni-plex CO. | Flemington | NJ | — | ◇ UNVERIFIED |
| TSTri Star Molding INC | Marcellus | MI | — | ◇ UNVERIFIED |
| TITri-tube INC | Abingdon | VA | — | ◇ UNVERIFIED |
| TFTroy Fiberglass Plant | Troy | TX | — | ◇ UNVERIFIED |
| TFTroy Foundry (screening Plant) | Adger | AL | — | ◇ UNVERIFIED |
| TPTru-form Plastics INC | Gardena | CA | — | ◇ UNVERIFIED |
| TMTuflex Manufacturing CO. | Pompano Beach | FL | — | ◇ UNVERIFIED |
| TRTulip Richardson Manufacturing Incorporated | Columbus | IN | — | ◇ UNVERIFIED |
| TFTung Fei Plastic INC | Hayward | CA | — | ◇ UNVERIFIED |
| TTupperware | Hemingway | SC | — | ◇ UNVERIFIED |
| TPTyler Pipe CO | Tyler | TX | — | ◇ UNVERIFIED |
| TNTyvak Nano Satellite Systems | Irvine | CA | — | ◇ UNVERIFIED |
| UEUnion Electric Akers | Avonmore | PA | — | ◇ UNVERIFIED |
| USUnited States Pipe and Foundry Company Dba U.s. Pi | Union City | CA | — | ◇ UNVERIFIED |
| USUnited States Pipe & Foundry Company LLC | Naperville | IL | — | ◇ UNVERIFIED |
 Universal Plastics INC. | Chico | CA | — | ◇ UNVERIFIED |
| UPUniversal Precast Concrete, INC. | Redding | CA | — | ◇ UNVERIFIED |
| UDU.s. Department of Labor-osha | Red Bud | IL | — | ◇ UNVERIFIED |
| UDU.s. Dol Osha | Richland | PA | — | ◇ UNVERIFIED |
| UDUS Dol Osha Fort Lauderdale Ao | Medley | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Phenix City | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Enterprise | AL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Galena | IL | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | South Beloit | IL | — | ◇ UNVERIFIED |
| USU S Fence INC (plastics Div ) | Morristown | TN | — | ◇ UNVERIFIED |
| USU S Foundry & Manufacturing | Tampa | FL | — | ◇ UNVERIFIED |
| UCUsg Ceilings Plus LLC | Commerce | CA | — | ◇ UNVERIFIED |
