| OMOmco Midwest Roll Forming | Pierceton | IN | — | ◇ UNVERIFIED |
| OPOmni Products, INC. | Lincolnton | NC | — | ◇ UNVERIFIED |
| OMO'neal Manufacturing Services | Ambridge | PA | — | ◇ UNVERIFIED |
| OSOps Sales Company | Birmingham | AL | — | ◇ UNVERIFIED |
| OUOpta USA Inc/affival INC | New Kensington | PA | — | ◇ UNVERIFIED |
| OSOregon Steel Mills-fontana Div | Fontana | CA | — | ◇ UNVERIFIED |
| OROttawa River Steel | Detroit | MI | — | ◇ UNVERIFIED |
| OSOutokumpu Stainless | Richburg | SC | — | ◇ UNVERIFIED |
| OSOutokumpu Stainless USA LLC | Haverhill | MA | — | ◇ UNVERIFIED |
| OSOwens Steel Fabricators, INC. | Dallas | GA | — | ◇ UNVERIFIED |
| PSPacific Steel Group | Bloomington | CA | — | ◇ UNVERIFIED |
| PGPanther Global Technologies | Wixom | MI | — | ◇ UNVERIFIED |
| PMPanther Machine INC | Wixom | MI | — | ◇ UNVERIFIED |
| PCParamit Corporation | Morgan Hill | CA | — | ◇ UNVERIFIED |
| PMParamount Metals & Supply CO | Paramount | CA | — | ◇ UNVERIFIED |
| PTPatterson Tubular Services | Liberty | TX | — | ◇ UNVERIFIED |
| PIPaughco, INC | Mound House | NV | — | ◇ UNVERIFIED |
| PSPennsylvania Sintered Metals INC | Emporium | PA | — | ◇ UNVERIFIED |
| PFPenny Fabrication | Johnstown | OH | — | ◇ UNVERIFIED |
| PUPetmin USA Incorporated (0204012023) | Ashtabula | OH | — | ◇ UNVERIFIED |
| POPhlebotomists on Wheels | Pompano Beach | FL | — | ◇ UNVERIFIED |
| PSPhoenix Services LLC Georgetown | Georgetown | SC | — | ◇ UNVERIFIED |
| PSPhoenix Services LLC Pig Iron Caster | Gary | IN | — | ◇ UNVERIFIED |
| PSPhoenix Svc LLC - Johnstown Slag Prep Facility | Johnstown | PA | — | ◇ UNVERIFIED |
| PFPittsburgh Flatroll Company | Pittsburgh | PA | — | ◇ UNVERIFIED |
| PSPkm Steel Service - Salina (s Ave C) | Salina | KS | — | ◇ UNVERIFIED |
| PSPowers Solar Frames, LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| PSPowers Steel & Wire Products INC | Phoenix | AZ | — | ◇ UNVERIFIED |
| PMPrecision Machine Shop Inc | Houston | TX | — | ◇ UNVERIFIED |
| PSPrecision Specialty Metals INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| PTPrecision Tooling Technologies, LLC | Zeeland | MI | — | ◇ UNVERIFIED |
 Prentex Alloy Fabricators, Incorporated | Dallas | TX | — | ◇ UNVERIFIED |
| PRProfessional Refinishing Org | La Puente | CA | — | ◇ UNVERIFIED |
| PIProfiles INC | Palmer | MA | — | ◇ UNVERIFIED |
| PDProtech Design | Anaheim | CA | — | ◇ UNVERIFIED |
| PFPrototype Fabricators Co. | Cleveland | OH | — | ◇ UNVERIFIED |
| PMPyron Metal | Niagara Falls | NY | — | ◇ UNVERIFIED |
| QAQuailty Automotive | Westminster | CA | — | ◇ UNVERIFIED |
 Quality Aluminum Forge INC | Long Beach | CA | — | ◇ UNVERIFIED |
| QEQuality Engineered Steels, LLC Dba Wv Cold Drawn | Point Pleasant | WV | — | ◇ UNVERIFIED |
 Quality Metal Works | Plant City | FL | — | ◇ UNVERIFIED |
| QQQuick Quack Car Wash Coe | Roseville | CA | — | ◇ UNVERIFIED |
| RGRaiden Group Site Development | Atwood | KS | — | ◇ UNVERIFIED |
| RFRebellion Fabrication LLC | Wahoo | NE | — | ◇ UNVERIFIED |
| RSRecticon/allied Steel CORP. | Parker Ford | PA | — | ◇ UNVERIFIED |
| RSRegional Steel CORP | Fontana | CA | — | ◇ UNVERIFIED |
| RTReliable Temps, INC. | Palmer | MA | — | ◇ UNVERIFIED |
| RWReliable Welding, INC. | Tampa | FL | — | ◇ UNVERIFIED |
| RERepublic Engineered Products, LLC - Gary Dunes Plant | Gary | IN | — | ◇ UNVERIFIED |
| RERepublic Engineered Steel, INC | Naperville | IL | — | ◇ UNVERIFIED |
| RSRepublic Steel, Lackawanna | Blasdell | NY | — | ◇ UNVERIFIED |
| RTRepublic Technologies International LLC | Harvey | IL | — | ◇ UNVERIFIED |
| RMReserve Marine Terminal | Chicago | IL | — | ◇ UNVERIFIED |
| RCRidgeline Capital Holding Corp. | Waltham | MA | — | ◇ UNVERIFIED |
| RPRiw Plan of Steel, LP | Raleigh | NC | — | ◇ UNVERIFIED |
| RJR J R Drying, INC. | East Chicago | IN | — | ◇ UNVERIFIED |
| RMRoler Machine Shop Incorporated | Brownsville | TX | — | ◇ UNVERIFIED |
| RFRoll Former Corporation | Chalfont | PA | — | ◇ UNVERIFIED |
| RTRolling, Tank and Fabrication Inc | Eighty Four | PA | — | ◇ UNVERIFIED |
| RSRouge Steel CO | Dearborn | MI | — | ◇ UNVERIFIED |
| RPR P M Centerless Grinding CO | Norco | CA | — | ◇ UNVERIFIED |
| RTRr Traders & Import Export LLC | Lewis Center | OH | — | ◇ UNVERIFIED |
| RIRusselloy Iron Foundry, LLC | Coralville | IA | — | ◇ UNVERIFIED |
| RIRyerson INC. | Eldridge | IA | — | ◇ UNVERIFIED |
| SSSamuel Steel Pickling CO * | Cleveland | OH | — | ◇ UNVERIFIED |
| SHSamuel-whittar Holdings INC | Troy | MI | — | ◇ UNVERIFIED |
| SISamuel-whittar INC | Detroit | MI | — | ◇ UNVERIFIED |
| SRSa Recycling LLC | Missouri | MO | — | ◇ UNVERIFIED |
| SBSbc Building Systems, LLC. | Ambridge | PA | — | ◇ UNVERIFIED |
 Schlosser Forge Company Rancho Plant #2 | Fontana | CA | — | ◇ UNVERIFIED |
| SSSchultz & Sons Salvage INC | Denton | MD | — | ◇ UNVERIFIED |
| SISearing Ind | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| SFSefi Fabricators; IMC Teddy; Bayone Stainless Products | Amityville | NY | — | ◇ UNVERIFIED |
| SESet Enterprises INC | New Boston | MI | — | ◇ UNVERIFIED |
| SWSeverstal Wheeling/allenport | Allenport | PA | — | ◇ UNVERIFIED |
| SPShawcor Pipe Protection LLC. | Fontana | CA | — | ◇ UNVERIFIED |
| SSSheffield Steel Products INC | Macedonia | OH | — | ◇ UNVERIFIED |
| SFSherwood Friction Materials | Detroit | MI | — | ◇ UNVERIFIED |
| SMShieldalloy Metallurgical | Newfield | NJ | — | ◇ UNVERIFIED |
| SRShipping Rail Red Line | Blytheville | AR | — | ◇ UNVERIFIED |
| SSShoreline Steel Supply INC | New Haven | MI | — | ◇ UNVERIFIED |
| SASierra Alloys Company | Azusa | CA | — | ◇ UNVERIFIED |
| SDSigma DG Corporation Inc. | Vancouver | WA | — | ◇ UNVERIFIED |
| SWSkipper Wright INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
 Skyline Steel CORP | Brooklyn | NY | — | ◇ UNVERIFIED |
| SLSlater Lemont CORP | Lemont | IL | — | ◇ UNVERIFIED |
| SSSmi Steel Arkansas (dba Cmc Steel Ar) | Magnolia | AR | — | ◇ UNVERIFIED |
| SMSms Mill Services LLC Contractor of Ace | Burns Harbor | IN | — | ◇ UNVERIFIED |
| SMSnl-iov Montclair Owner LLC | Montclair | CA | — | ◇ UNVERIFIED |
| SSSolid Steel Sales, INC. | Acworth | GA | — | ◇ UNVERIFIED |
| SISolsil Incorporated (0684000225) | Beverly | OH | — | ◇ UNVERIFIED |
| SPSouthern Perfection Fabrication Holdings, INC. | Byron | GA | — | ◇ UNVERIFIED |
| SSSouthern Star Steel Services LLC | Lorena | TX | — | ◇ UNVERIFIED |
| SSSouthern Steel Fabricators | Metairie | LA | — | ◇ UNVERIFIED |
| SSSouthern Steel Products CO | Clarksburg | WV | — | ◇ UNVERIFIED |
| SMSouthwind Milling Company, LLC | Pine Bluff | AR | — | ◇ UNVERIFIED |
| SMSpg Mechanical | Pocatello | ID | — | ◇ UNVERIFIED |
| SMSquires Metal Fabrication INC. | Tyler | TX | — | ◇ UNVERIFIED |
| SMSsab Minnesota INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| SSS & S Custom Iron Works Llc | Redmond | WA | — | ◇ UNVERIFIED |
