| STShearer Tanks, LLC | Arco | ID | — | ◇ UNVERIFIED |
| SSSilver State Stainless, INC. | Carson City | NV | — | ◇ UNVERIFIED |
| SMSkousen Manufacturing Limited Liability Company | Rigby | ID | — | ◇ UNVERIFIED |
| SISlidell INC | Owatonna | MN | — | ◇ UNVERIFIED |
| SESMF Enterprises, LLC | Republic | MO | — | ◇ UNVERIFIED |
| SESmith Equipment and Welding | Prineville | OR | — | ◇ UNVERIFIED |
| SISmyth Industries INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| SFSnw Fabrication, LLC | Robstown | TX | — | ◇ UNVERIFIED |
| SISnyder Industries INC | Mancelona | MI | — | ◇ UNVERIFIED |
| SCSo Cal Tank & Fab | Chino | CA | — | ◇ UNVERIFIED |
| SGSouth Gate Engineering LLC | Chino | CA | — | ◇ UNVERIFIED |
| SPSpa Pipe & Supply, L.p. | Abilene | TX | — | ◇ UNVERIFIED |
| STSpecialty Tank & Equip CO | Jacksonville | FL | — | ◇ UNVERIFIED |
| SMStanwade Metal Products | Fowler | OH | — | ◇ UNVERIFIED |
| SFSteel Fab | Abingdon | VA | — | ◇ UNVERIFIED |
| SFSteel Fab a Div. of Samuel Pressure Vessel Group (plant #2) | Abingdon | VA | — | ◇ UNVERIFIED |
| SIStellar Industries, INC. | Hastings | NE | — | ◇ UNVERIFIED |
| SCStructural Composites Ind | Pomona | CA | — | ◇ UNVERIFIED |
| SPStx Process Equipment LLC | Freer | TX | — | ◇ UNVERIFIED |
| STSuperior Tank Company | Lake Forest | CA | — | ◇ UNVERIFIED |
| SSyncreon | Kansas City | MO | — | ◇ UNVERIFIED |
| TTTallaboa Tank and Fabricators, INC | Penuelas | PR | — | ◇ UNVERIFIED |
| TTTallaboa Tank & Fabricadores INC | Penuelas | PR | — | ◇ UNVERIFIED |
| TETanco Engineering INC | Loveland | CO | — | ◇ UNVERIFIED |
| TCTank Components Industries | Springfield | MO | — | ◇ UNVERIFIED |
| TCTankcraft CORP | Walworth | WI | — | ◇ UNVERIFIED |
| TITankheads, INC. | Haslet | TX | — | ◇ UNVERIFIED |
| TITarsco, INC. | Corpus Christi | TX | — | ◇ UNVERIFIED |
| TATaylor-wharton America | Baytown | TX | — | ◇ UNVERIFIED |
| TBT Bailey March Point Rd | Anacortes | WA | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley Services | Carlsbad | NM | — | ◇ UNVERIFIED |
| TPTexas Pipe Fabricators, INC. | Corpus Christi | TX | — | ◇ UNVERIFIED |
| TSTexas Superior Tanks, LLC | Beasley | TX | — | ◇ UNVERIFIED |
| THThe Hughes Staffing Agency | North Little Rock | AR | — | ◇ UNVERIFIED |
 Thermal Equipment CORP | Compton | CA | — | ◇ UNVERIFIED |
| TRThe Roberts Company Fabrication Services, INC. | Winterville | NC | — | ◇ UNVERIFIED |
| TRThe Roberts Company, INC. | Winterville | NC | — | ◇ UNVERIFIED |
| TMTMD Manufacturing Inc. | Sulphur Springs | TX | — | ◇ UNVERIFIED |
| TATn Americas LLC | Kernersville (guilford,nc) | NC | — | ◇ UNVERIFIED |
| TATobul Accumulator INC | Bamberg | SC | — | ◇ UNVERIFIED |
| TTTok Tank | Garden City | KS | — | ◇ UNVERIFIED |
| UCUltraflote Corporation | Lubbock | TX | — | ◇ UNVERIFIED |
| UEUnified Equipment Systems INC | Clinton Township | MI | — | ◇ UNVERIFIED |
| UTUnion Tank Car Company | East Chicago | IN | — | ◇ UNVERIFIED |
| UTUnion Tank Car CO - Valdosta Facility | Valdosta | GA | — | ◇ UNVERIFIED |
| UCUrs Corporation | Casper | WY | — | ◇ UNVERIFIED |
| UDUS Dol Osha- Augusta, Maine Ao | Windham | ME | — | ◇ UNVERIFIED |
| UOUsdol Osha Lubbock | Merkel | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Atmore | AL | — | ◇ UNVERIFIED |
| UMU.s. Manufacturing Co., LLC | Middleboro | MA | — | ◇ UNVERIFIED |
| VPValley Pump & Machine Works, INC. | Casa Grande | AZ | — | ◇ UNVERIFIED |
| VVVent-rite Valve Corporation | Randolph | MA | — | ◇ UNVERIFIED |
| VFVertex Fab & Design, LLC | Middleboro | MA | — | ◇ UNVERIFIED |
| WRWa317934822 - Rate INC | Kelso | WA | — | ◇ UNVERIFIED |
| WPWa317938216 - P S F Industries INC | Seattle | WA | — | ◇ UNVERIFIED |
| WGWa317942712 - Greer Tank INC | Lakewood | WA | — | ◇ UNVERIFIED |
| WGWa317949403 - Greenberry Industrial LLC | Wallula | WA | — | ◇ UNVERIFIED |
| WPWa317949562 - Packaging Corporation of America | Wallula | WA | — | ◇ UNVERIFIED |
| WGWa317950652 - Greenberry Industrial LLC | Wallula | WA | — | ◇ UNVERIFIED |
| WCWessels Company | Greenwood | IN | — | ◇ UNVERIFIED |
| WIWestmor Industries LLC - Truck | Morris | MN | — | ◇ UNVERIFIED |
| WKWhite Knuckle Kustoms | Windham | ME | — | ◇ UNVERIFIED |
| WFWitherup Fabrication & Erection INC | Kennerdell | PA | — | ◇ UNVERIFIED |
| WSW.m. Sprinkman | Waukesha | WI | — | ◇ UNVERIFIED |
| WWWorley Welding Works, INC. | Levelland | TX | — | ◇ UNVERIFIED |
| WIWorthington Industries (0285030456) | Wooster | OH | — | ◇ UNVERIFIED |
| WWW W Welding INC | Frenchburg | KY | — | ◇ UNVERIFIED |
| ZBZierke Built Manufacturing INC | Winnebago | MN | — | ◇ UNVERIFIED |
| ZBZierke Built Manufacturing INC | Winnebago | MN | — | ◇ UNVERIFIED |
| ZWZ W INC. | Pampa | TX | — | ◇ UNVERIFIED |
