| RMRocky Mountain Rebar | Delta | CO | — | ◇ UNVERIFIED |
| RMRosedale Marketing Dba Port-a Stall | Erie | CO | — | ◇ UNVERIFIED |
| RTR&R Tool, Inc. | Holland | MI | — | ◇ UNVERIFIED |
| RWRt Welding | Hesperia | CA | — | ◇ UNVERIFIED |
| RLRtz, LLC | Winchester | VA | — | ◇ UNVERIFIED |
| RTRubicon Technology | Batavia | IL | — | ◇ UNVERIFIED |
| RSRush Steel Supply Incorporated | El Centro | CA | — | ◇ UNVERIFIED |
| STSalem Tube Inc/greenville Reynolds Ind Pk | Greenville | PA | — | ◇ UNVERIFIED |
| SSSamuel, Son & CO. (usa) INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| SCSanta Clara Windustrial | Fremont | CA | — | ◇ UNVERIFIED |
| SPSchnitzer Puerto Rico, INC. | Salinas | PR | — | ◇ UNVERIFIED |
| SXSchulz Xtruded Products | Robinsonville | MS | — | ◇ UNVERIFIED |
| SIScot Industries | Muscoda | WI | — | ◇ UNVERIFIED |
| SIScot Industries, INC. | Talladega | AL | — | ◇ UNVERIFIED |
| SNSerimax North America | Theodore | AL | — | ◇ UNVERIFIED |
| SSService Steel Framing, Inc. | Auburn | IN | — | ◇ UNVERIFIED |
| STSeymour Tubing INC. | Dunlap | TN | — | ◇ UNVERIFIED |
| STSeymour Tubing Incorporated | Seymour | IN | — | ◇ UNVERIFIED |
| SMSG Metals, LLC (JJKF Properties, LLC | Sea Girt | NJ | — | ◇ UNVERIFIED |
| SMShardy Machine Services LLC | Burghill | OH | — | ◇ UNVERIFIED |
| SCShasta Capt Haz Waste Operation | Aliquippa | PA | — | ◇ UNVERIFIED |
| SNShaw Naptech | Clearfield | UT | — | ◇ UNVERIFIED |
| SNSheldon North Yard | Channelview | TX | — | ◇ UNVERIFIED |
| SDSierra Design & Manufacturing | Modesto | CA | — | ◇ UNVERIFIED |
| SIS & I Ironworks Corp. | Miami | FL | — | ◇ UNVERIFIED |
| SISinnott Industries, INC. | Philadelphia | PA | — | ◇ UNVERIFIED |
| SCSix C Fabrication, INC. (1667070022) | Rootstown | OH | — | ◇ UNVERIFIED |
| SPSkinz Protective Gear | Paynesville | MN | — | ◇ UNVERIFIED |
 Skyline Steel | Canon City | CO | — | ◇ UNVERIFIED |
| Skyline Steel | Kissimmee | FL | — | ◇ UNVERIFIED |
| SASlob and Sons Pipe & Casing, INC. | Marion | OH | — | ◇ UNVERIFIED |
| SESnelling Employment, LLC | Odessa | TX | — | ◇ UNVERIFIED |
| SSSouthern Steel Specialists | Clermont | GA | — | ◇ UNVERIFIED |
| SSSovereign Steel Manufacturing, LLC | Allentown | PA | — | ◇ UNVERIFIED |
| SSpacerak | Marlette | MI | — | ◇ UNVERIFIED |
| SISpacewalker, INC. | Bonne Terre | MO | — | ◇ UNVERIFIED |
| SWSparkster Welding Fabrication & | Springtown | TX | — | ◇ UNVERIFIED |
 Springs Fabrication, INC | Loveland | CO | — | ◇ UNVERIFIED |
| SMStar Metals, Inc. | Jurupa Valley | CA | — | ◇ UNVERIFIED |
| SPStar Pipe Products | Houston | TX | — | ◇ UNVERIFIED |
| STStar Tubular Services Division | Lone Star | TX | — | ◇ UNVERIFIED |
| SPSteel Pipe Fabricators, LLC | Norcross | GA | — | ◇ UNVERIFIED |
| SSSteel Serevices INC | Norfolk | VA | — | ◇ UNVERIFIED |
 Steel Service Center, INC. | Lewiston | ME | — | ◇ UNVERIFIED |
| SSSteel Suppliers Erectors INC. | Wilmington | DE | — | ◇ UNVERIFIED |
| SPSterling Pipe & Tube, INC. | Toledo | OH | — | ◇ UNVERIFIED |
| SSSteven Steel Supply | Columbus | OH | — | ◇ UNVERIFIED |
| SGStone Gryphon Tactical LLC | Chula Vista | CA | — | ◇ UNVERIFIED |
| SCStupp CORP | Baton Rouge | LA | — | ◇ UNVERIFIED |
| S7Subsea 7 Ingleside | Ingleside | TX | — | ◇ UNVERIFIED |
| SGSummit Global Contractors, INC. | Vidor | TX | — | ◇ UNVERIFIED |
| SISummit Iron Works Group INC | Gardena | CA | — | ◇ UNVERIFIED |
| SSSummit Steel Corporation | Chagrin Falls | OH | — | ◇ UNVERIFIED |
| SMSuperior Metal Fabricators, INC. | Las Vegas | NV | — | ◇ UNVERIFIED |
| SSSusini Specialty Steels, INC. | Natrona Heights | PA | — | ◇ UNVERIFIED |
| STSwepco Tube LLC | Clifton | NJ | — | ◇ UNVERIFIED |
| SSSxp Schulz Xtruded Products LLC | Hernando | MS | — | ◇ UNVERIFIED |
| TSTampa Steel & Supply | Tampa | FL | — | ◇ UNVERIFIED |
| TITasco Iron & Metal, LLC | Lake Havasu City | AZ | — | ◇ UNVERIFIED |
| TMTaylor Metal Works & Pipe Co., INC. | Port Arthur | TX | — | ◇ UNVERIFIED |
| TQTeam Quality Services, INC. | Panama City | FL | — | ◇ UNVERIFIED |
| TTTech Tube Inc/upper Merion | King of Prussia | PA | — | ◇ UNVERIFIED |
| TTTeda Tpco America Corporation | Gregory | TX | — | ◇ UNVERIFIED |
| TCTenaris Coiled Tubes - Seacat | Houston | TX | — | ◇ UNVERIFIED |
| TMTenaris Mesa | Houston | TX | — | ◇ UNVERIFIED |
| TSTetra Steel Corporation | Montclair | NJ | — | ◇ UNVERIFIED |
| TSTetra Steel Corporation | Bronx | NY | — | ◇ UNVERIFIED |
| TSTexas Specialty Steel, LLC | San Antonio | TX | — | ◇ UNVERIFIED |
| TTTexas Tubular Products | Lone Star | TX | — | ◇ UNVERIFIED |
| TPThompson Pipe Group Pressure | Grand Prairie | TX | — | ◇ UNVERIFIED |
| TEThormax Enterprises, LLC | Columbus | IN | — | ◇ UNVERIFIED |
| TEThormax Enterprises, LLC | Columbus | IN | — | ◇ UNVERIFIED |
| TCThriller Car Company, Inc. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| TATi Automotive (formerly Bundy Corportation) | Warren | MI | — | ◇ UNVERIFIED |
| TATi Automotive Systems | Auburn Hills | MI | — | ◇ UNVERIFIED |
| TFTi Fluid Systems | Tallassee | AL | — | ◇ UNVERIFIED |
| TGTi Group Automotive System, LLC | Cynthiana | KY | — | ◇ UNVERIFIED |
| TGTi Group Automotive Systems LLC | Auburn Hills | MI | — | ◇ UNVERIFIED |
| TMTomco Machining INC | Dayton | OH | — | ◇ UNVERIFIED |
| TTTotten Tubes INC - Santee | Santee | CA | — | ◇ UNVERIFIED |
| TMTransMachine MTT Inc. | Aurora | IL | — | ◇ UNVERIFIED |
| TTTrent Tube | Carrollton | GA | — | ◇ UNVERIFIED |
| TPTricon Piping System, INC. | Canastota | NY | — | ◇ UNVERIFIED |
| TPTrinity Products, INC. | Saint Charles | MO | — | ◇ UNVERIFIED |
 Trinity Stainless INC. | Nixa | MO | — | ◇ UNVERIFIED |
| TSTri-state Steel of Nevada LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| TVTri Valley Iron INC. | Palisades | NY | — | ◇ UNVERIFIED |
| TSTryad Service CORP. | Shafter | CA | — | ◇ UNVERIFIED |
| TUTubacex US Holding INC / Tubacex US Holding INC | Durant | OK | — | ◇ UNVERIFIED |
| TBTube Bending Specialists & Machinery, LLC | Hayward | CA | — | ◇ UNVERIFIED |
| TNTubetech North America, INC. | E Palestine | OH | — | ◇ UNVERIFIED |
| TSTuboscope Sheldon South Inspection Facility | Channelview | TX | — | ◇ UNVERIFIED |
| TPTubular Perforating Manufacturing of Conroe, LTD. | Conroe | TX | — | ◇ UNVERIFIED |
| TPTubular Processing Houston Operations | Houston | TX | — | ◇ UNVERIFIED |
| TPTubular Products Company, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| TSTubular Steel, INC. | Hazelwood | MO | — | ◇ UNVERIFIED |
| TSTubular Structures International, L.l.c | Mc Gregor | TX | — | ◇ UNVERIFIED |
| TPTurning Point Custom Machine LLC | De Pere | WI | — | ◇ UNVERIFIED |
| TMTy M. Wright | Portland | OR | — | ◇ UNVERIFIED |
| UHUltimate Highway Sales, INC. | Palos Heights | IL | — | ◇ UNVERIFIED |
