| SMShapiro Metal Supply Company | Saint Louis | MO | — | ◇ UNVERIFIED |
| SMSheet Metal Specialties LLC | Monroe | LA | — | ◇ UNVERIFIED |
| SMSheffield Metals, International | Denver | CO | — | ◇ UNVERIFIED |
| SIShellpro INC | Lockeford | CA | — | ◇ UNVERIFIED |
| SFSho-Me Fabrication LLC | Springfield | MO | — | ◇ UNVERIFIED |
| SBShouldice Bros Sheet Metal Mfg & Millwrights | Battle Creek | MI | — | ◇ UNVERIFIED |
| SIShumaker Ind/northumberland Plt | Northumberland | PA | — | ◇ UNVERIFIED |
| SCSi Chem LLC | Marietta | GA | — | ◇ UNVERIFIED |
| SISidco, INC (0575010226) | Sidney | OH | — | ◇ UNVERIFIED |
| SISidel, INC. | Norcross | GA | — | ◇ UNVERIFIED |
| SISierra International Machinery LLC | Bakersfield | CA | — | ◇ UNVERIFIED |
| STSierra Technologies | Tulsa | OK | — | ◇ UNVERIFIED |
| SISigntech INC | San Diego | CA | — | ◇ UNVERIFIED |
 Silver Ring Splint Company | Charlottesville | VA | — | ◇ UNVERIFIED |
| SLSimair, LTD | Bixby | OK | — | ◇ UNVERIFIED |
| SISimtek INC. | Amityville | NY | — | ◇ UNVERIFIED |
| SUSimt Usa, LLC | Fairburn | GA | — | ◇ UNVERIFIED |
| SMSirk Mechanical Services, INC. | Philadelphia | PA | — | ◇ UNVERIFIED |
| SLSistek LLC | Somerset | TX | — | ◇ UNVERIFIED |
| SHSJT Holding Corp. | Bayamon | PR | — | ◇ UNVERIFIED |
| SRSkf Reelcraft Industries | Columbia City | IN | — | ◇ UNVERIFIED |
| SSSk Sales Company, INC. | Mountain Top | PA | — | ◇ UNVERIFIED |
| SGSkyground Group Inc | Clearbrook | MN | — | ◇ UNVERIFIED |
| SGSkyground Group Inc. | Clearbrook | MN | — | ◇ UNVERIFIED |
| SISkylon INC | Sugar Grove | PA | — | ◇ UNVERIFIED |
| STSky Tec Container Corporation | Grand Rapids | MI | — | ◇ UNVERIFIED |
| SLS L Auburn INC | Auburn | NY | — | ◇ UNVERIFIED |
| SMSmc Metal Fabricators INC | Oshkosh | WI | — | ◇ UNVERIFIED |
| SMS. M. F., Inc. | O'Fallon | MO | — | ◇ UNVERIFIED |
| SCSmi Construction, INC. | San Leandro | CA | — | ◇ UNVERIFIED |
| SBSmith Brothers Racing Products, INC. | Redmond | OR | — | ◇ UNVERIFIED |
 Smiths Interconnect INC | South Deerfield | MA | — | ◇ UNVERIFIED |
| SSSmith SS, LLC | Bowling Green | OH | — | ◇ UNVERIFIED |
| SMSmj Metal Co., INC | Amherst | MA | — | ◇ UNVERIFIED |
| SMS.m.k. Machine & Fabrication, INC. | Ringgold | GA | — | ◇ UNVERIFIED |
| SMSmoky Mountain Rod & Customs, LLC | Knoxville | TN | — | ◇ UNVERIFIED |
| SESMP Engineering, Inc. | Arcadia | CA | — | ◇ UNVERIFIED |
| SISms Industries, LLC. | Las Vegas | NV | — | ◇ UNVERIFIED |
| SMSmtc Manufacturing CORP of Massachusetts | Franklin | MA | — | ◇ UNVERIFIED |
| STSnapp Tool & Die, Inc. | El Paso | TX | — | ◇ UNVERIFIED |
| SESnowline Engineering | Shingle Springs | CA | — | ◇ UNVERIFIED |
| SESnyder Equipment Co., INC. | Nixa | MO | — | ◇ UNVERIFIED |
 Snyder Manufacturing, Inc. | Salamanca | NY | — | ◇ UNVERIFIED |
| SPSolidification Products International, INC | North Haven | CT | — | ◇ UNVERIFIED |
| SMSollock Metal Works, LLC | Clute | TX | — | ◇ UNVERIFIED |
| SISomething in the Orange | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SMSondrol Machining LLC | Sunburg | MN | — | ◇ UNVERIFIED |
| SPSooner Pipe Crosby Yard | Crosby | TX | — | ◇ UNVERIFIED |
| SISos/aaa Iron Works INC | Mobile | AL | — | ◇ UNVERIFIED |
| SPSouriau Paande Sequim | Sequim | WA | — | ◇ UNVERIFIED |
| SASouth Austin Workshop, LLC | Austin | TX | — | ◇ UNVERIFIED |
| SESoutheastern Engineering Sales INC | Colonial Heights | VA | — | ◇ UNVERIFIED |
| SMSoutheastern Metal Fabricator | Rockland | MA | — | ◇ UNVERIFIED |
| SCSouthern Custom Fabrication | Carencro | LA | — | ◇ UNVERIFIED |
| SESouthern Enterprises of Southeast Louisiana, INC. | Ponchatoula | LA | — | ◇ UNVERIFIED |
| SISouthern Industrial Metal Fabricators INC | Smyrna | GA | — | ◇ UNVERIFIED |
| SMSouthern Metal Processing Company | Oxford | AL | — | ◇ UNVERIFIED |
| SMSouthern Metal Restoration Company, LLC | Newnan | GA | — | ◇ UNVERIFIED |
| SMSouthern Miscellaneous Columbia LLC | West Columbia | SC | — | ◇ UNVERIFIED |
| SPSouthern Perfection Fabrication Holdings, INC. | Byron | GA | — | ◇ UNVERIFIED |
| SRSouthern Rust Furniture LLC | Monroe | NC | — | ◇ UNVERIFIED |
| SVSouthern Vac, LLC | Grand Prairie | TX | — | ◇ UNVERIFIED |
| SCSouth-land Carbon Products, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| SMSouthland Manufacturing INC | Douglasville | GA | — | ◇ UNVERIFIED |
| SLSouthline - Lpgs Tanforan LLC | South San Francisco | CA | — | ◇ UNVERIFIED |
| SPSouth Plains Steel, INC. | Lubbock | TX | — | ◇ UNVERIFIED |
| SMSouthwark Metal Manufacturing CO. | Fremont | NE | — | ◇ UNVERIFIED |
| SESouthwest Engineering Company | Oklahoma City | OK | — | ◇ UNVERIFIED |
| SCSpaid Corporation, INC. | Pittsburgh | PA | — | ◇ UNVERIFIED |
| SSSpare Skid Plate | Aurora | CO | — | ◇ UNVERIFIED |
| SESparkman Enterprises LLC | Tucson | AZ | — | ◇ UNVERIFIED |
| SSSpartan Steel LLC | Pocatello | ID | — | ◇ UNVERIFIED |
| SMSpartech Marine Industries Florida | Rockledge | FL | — | ◇ UNVERIFIED |
| SBSpec Built Systems INC | Chula Vista | CA | — | ◇ UNVERIFIED |
| SFSpecial Fab & Machine, INC. | Lexington | NC | — | ◇ UNVERIFIED |
| SFSpecial Fleet Service | Harrisonburg | VA | — | ◇ UNVERIFIED |
| SBSpeciality Bar Products Company | Blairsville | PA | — | ◇ UNVERIFIED |
| SMSpeciality Manufacturing | Nazareth | PA | — | ◇ UNVERIFIED |
| SFSpecialized Fabrication & Machine INC | Eugene | OR | — | ◇ UNVERIFIED |
| STSpecialized Turning, INC. | Peabody | MA | — | ◇ UNVERIFIED |
| SASpecialty Applications | Ponchatoula | LA | — | ◇ UNVERIFIED |
| SESpecialty Engineering Tool & Die, LLC | Huntington | IN | — | ◇ UNVERIFIED |
| SMSpecialty Machine and CNC Inc. | Battle Ground | IN | — | ◇ UNVERIFIED |
| SPSpecialty Performance LLC | Dahlonega | GA | — | ◇ UNVERIFIED |
| SSSpecialty Support Systems, INC. | Levittown | PA | — | ◇ UNVERIFIED |
| SSSpecific Systems, LLC | Tulsa | OK | — | ◇ UNVERIFIED |
| STSpede Tool Mfg CO -yucca Rd | Adelanto | CA | — | ◇ UNVERIFIED |
| SBSpike Brewing, LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| SMSpill-stop Mfg. LLC | Melrose Park | IL | — | ◇ UNVERIFIED |
| SSSportsman Steel Safe Company | Long Beach | CA | — | ◇ UNVERIFIED |
| STSportsman Trailers | Santa Fe | TX | — | ◇ UNVERIFIED |
| SLSportswire LLC | Langley | OK | — | ◇ UNVERIFIED |
 Sportworks Global LLC | Mukilteo | WA | — | ◇ UNVERIFIED |
| SSSpraying System CO | Wheaton | IL | — | ◇ UNVERIFIED |
| SKSpray King Mfg INC | Fresno | CA | — | ◇ UNVERIFIED |
| SWSpringfield Welding & Mfg CO INC | Waunakee | WI | — | ◇ UNVERIFIED |
| SMSpring Metal Recycling,llc | Atlanta | GA | — | ◇ UNVERIFIED |
 Springs Fabrication - Waynoka | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SQS. Q. Fabrication, INC. | Andalusia | AL | — | ◇ UNVERIFIED |
| SLSquare10Source, LLC | Plant City | FL | — | ◇ UNVERIFIED |
