| RMRilco Manufacturing | Houston | TX | — | ◇ UNVERIFIED |
| RIR&k Industrial Products INC | Richmond | CA | — | ◇ UNVERIFIED |
| RFRmg Foundry | Mishawaka | IN | — | ◇ UNVERIFIED |
| RMR M Masonry | Richmond | VA | — | ◇ UNVERIFIED |
| RLRoastesso, LLC | Hialeah Gardens | FL | — | ◇ UNVERIFIED |
| RFRobinson Foundry INC | Alexander City | AL | — | ◇ UNVERIFIED |
| RIRobinson Industrial | Orange | CA | — | ◇ UNVERIFIED |
| RTRochester Tube Prod LTD | Shelby Twp | MI | — | ◇ UNVERIFIED |
| RCRockbridge Castings | Rockbridge | IL | — | ◇ UNVERIFIED |
| RHRock Hill Industrial Piping - Fabrication, INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| RRRock River Fabrication | Grand Rapids | MI | — | ◇ UNVERIFIED |
| RPRodriguez Pipe and Steel, INC. | Laredo | TX | — | ◇ UNVERIFIED |
| RSRomar Supply, Incorporated | Irving | TX | — | ◇ UNVERIFIED |
| RIRosenquist, INC. | N Wilkesboro | NC | — | ◇ UNVERIFIED |
| RBRoss Bending Dynamics LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| RCRoss Cast Metals | Lancaster | OH | — | ◇ UNVERIFIED |
| RSRoss Sand Casting Industries, Inc., Plan | Winchester | IN | — | ◇ UNVERIFIED |
| RSRoss Sand Casting Industry, LLC | Orrville | OH | — | ◇ UNVERIFIED |
| RWRoss Wheel Service INC | Bloomington | MN | — | ◇ UNVERIFIED |
| RSRr Street & CO INC | Chicago | IL | — | ◇ UNVERIFIED |
| RARs Automation, LLC. | Albion | NY | — | ◇ UNVERIFIED |
| RFRuiz Foods | Dinuba | CA | — | ◇ UNVERIFIED |
| SHSaar Holdings, LLC | Magna | UT | — | ◇ UNVERIFIED |
| SPS.A.E. Pipe Welding and Fabrication L.L.C. | Brigham City | UT | — | ◇ UNVERIFIED |
| STSalvadore Tool & Findings INC. | Providence | RI | — | ◇ UNVERIFIED |
| SASamir Aziz | North Hollywood | CA | — | ◇ UNVERIFIED |
| SFSamson Fabricators, LLC | Clute | TX | — | ◇ UNVERIFIED |
| SCSanders CO INC | Elizabeth City | NC | — | ◇ UNVERIFIED |
| SISandwich Iron Foundry | Plano | IL | — | ◇ UNVERIFIED |
| SMSather Mfg CO INC | Everett | WA | — | ◇ UNVERIFIED |
| SGSbi General & Mechanical INC. | Waterbury | NE | — | ◇ UNVERIFIED |
| SMSchadegg Mechanical INC | South Saint Paul | MN | — | ◇ UNVERIFIED |
 Schuff Steel Company | Salt Lake City | UT | — | ◇ UNVERIFIED |
| SFSchwarb Foundry | Warren | MI | — | ◇ UNVERIFIED |
| SISchwarb Industries INC | Troy | MI | — | ◇ UNVERIFIED |
| SEScott Engineering and Procurement, INC. (1431004456) | Loveland | OH | — | ◇ UNVERIFIED |
| SEScotty's Electric Motor Repair INC | Orland | CA | — | ◇ UNVERIFIED |
| SFSeaboard Foundry | Johnston, Town of | RI | — | ◇ UNVERIFIED |
| SASealed Air Corporation | Firebaugh | CA | — | ◇ UNVERIFIED |
| SBSelect Build INC | Escondido | CA | — | ◇ UNVERIFIED |
| SPSelling Precision INC. | West Milford | NJ | — | ◇ UNVERIFIED |
| SFSentry Fire Protection Incorporated | York | PA | — | ◇ UNVERIFIED |
| STSeparator Technology Solutions | San Leandro | CA | — | ◇ UNVERIFIED |
| SBSequoia Brick | Lindsay | CA | — | ◇ UNVERIFIED |
| SIServend International INC | Sellersburg | IN | — | ◇ UNVERIFIED |
| SBService Brass & Aluminum Foundry, INC. | Wichita | KS | — | ◇ UNVERIFIED |
| SESewer Equipment CO. of Florida, INC. | New Smyrna Beach | FL | — | ◇ UNVERIFIED |
| SCShaw Connex Incorporated | Troutville | VA | — | ◇ UNVERIFIED |
| SCShaw Constructors INC - Sw Region - Sulphur Facility | Sulphur | LA | — | ◇ UNVERIFIED |
| SFShaw Fabricators | Houston | TX | — | ◇ UNVERIFIED |
| SSShaw Shreveport Shreveport Facility | Shreveport | LA | — | ◇ UNVERIFIED |
| SSShaw Sunland Fabricators, LLC | Walker | LA | — | ◇ UNVERIFIED |
| SWShaw Word Ind. Fabricators | Tulsa | OK | — | ◇ UNVERIFIED |
| SFShelco Foundries Div of Gnutti Cado USA | Jacksonville | AL | — | ◇ UNVERIFIED |
| SFSherman Foundry | Sherman | TX | — | ◇ UNVERIFIED |
| SMSimmons Manufacturing Company | Mcdonough | GA | — | ◇ UNVERIFIED |
| SMSimonz Machine Dba Hyve Technologies | San Diego | CA | — | ◇ UNVERIFIED |
| SHSlack Horner Foundry | Longmont | CO | — | ◇ UNVERIFIED |
| SMSlinger Manufacturing CO INC | Slinger | WI | — | ◇ UNVERIFIED |
| SMSlinger Mfg CO INC Plant 1 | Slinger | WI | — | ◇ UNVERIFIED |
| SSSmeal Sfa LLC | Snyder | NE | — | ◇ UNVERIFIED |
| SISmith-cooper International | Commerce | CA | — | ◇ UNVERIFIED |
| SFSmith Foundry Company | Minneapolis | MN | — | ◇ UNVERIFIED |
| SISnap-tite INC / Nat'l Fire Ho | Compton | CA | — | ◇ UNVERIFIED |
| SSSoftrol Systems, INC | Acworth | GA | — | ◇ UNVERIFIED |
| SCSomerset Consolidate/somerset | Somerset | PA | — | ◇ UNVERIFIED |
| SISort-rite International, INC. | Harlingen | TX | — | ◇ UNVERIFIED |
| SSSo Safe Equipment | Motley | MN | — | ◇ UNVERIFIED |
| SCSoutheast Culvert, INC. | Cleveland | AL | — | ◇ UNVERIFIED |
| SCSouthern Cast INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| SISouthern Industrial Mechanical Maintenance Company Ii, LLC | Brownsville | TN | — | ◇ UNVERIFIED |
| SISouthern Industrial Mechanical Maintenance Company, LLC | Shreveport | LA | — | ◇ UNVERIFIED |
| SNSouthern Natural Gas - Mdc | Pinson | AL | — | ◇ UNVERIFIED |
| STSouthern Thermal Solutions, INC. | Sanford | NC | — | ◇ UNVERIFIED |
| STSouthern Tube Form | Clinton | TN | — | ◇ UNVERIFIED |
| SPSouthland Pipe CORP. | Rialto | CA | — | ◇ UNVERIFIED |
| SPSouthland Pipe Corporation | Hesperia | CA | — | ◇ UNVERIFIED |
| SFSpanish Fork Metals | Spanish Fork | UT | — | ◇ UNVERIFIED |
| SFSparta Foundry INC | Sparta | MI | — | ◇ UNVERIFIED |
| SBSpecialty Branded Products | Fresno | CA | — | ◇ UNVERIFIED |
| SFSpecialty Foundry | Brockton | MA | — | ◇ UNVERIFIED |
| SFSpecified Fittings INC | Bellingham | WA | — | ◇ UNVERIFIED |
| SBSpike Brewing, LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| SFSpitz Foundry INC | Hastings | NE | — | ◇ UNVERIFIED |
| SWSpotless Water Systems, LLC | Punta Gorda | FL | — | ◇ UNVERIFIED |
| SSSpray Sys INC | Pomona | CA | — | ◇ UNVERIFIED |
| SCSpring City Elec/spring City | Spring City | PA | — | ◇ UNVERIFIED |
| SISpringfield Iron Works INC | Chicopee | MA | — | ◇ UNVERIFIED |
| SCSps Companies INC Dba Pipe Fabricators | Osseo | MN | — | ◇ UNVERIFIED |
| SSS & S Tube INC | Bay Port | MI | — | ◇ UNVERIFIED |
| STStandard Thomson CORP | Waltham | MA | — | ◇ UNVERIFIED |
 Stang Industries INC | Corona | CA | — | ◇ UNVERIFIED |
| SPStang Precision INC | Paynesville | MN | — | ◇ UNVERIFIED |
| SUStant USA CORP | Romeo | MI | — | ◇ UNVERIFIED |
| SLState Line Foundries INC | Roscoe | IL | — | ◇ UNVERIFIED |
| SFStaver Foundry CO | Virginia | MN | — | ◇ UNVERIFIED |
| SMStealth Manufacturing, LLC | Leon | KS | — | ◇ UNVERIFIED |
| SPSteel Pipe Fabricators, LLC | Norcross | GA | — | ◇ UNVERIFIED |
| SISteico Industries INC a Subsidiary at Senior Operation LLC | Oceanside | CA | — | ◇ UNVERIFIED |
 Stephens Pipe & Steel, LLC | Wyoming | MI | — | ◇ UNVERIFIED |
