| SASmith Art Conservation LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| SBSmith Brothers Racing Products, INC. | Redmond | OR | — | ◇ UNVERIFIED |
| SSSmith Signs INC | San Francisco | CA | — | ◇ UNVERIFIED |
 Smiths Interconnect INC | South Deerfield | MA | — | ◇ UNVERIFIED |
| SSSmith & Sons Machine, Inc. | Brockton | MA | — | ◇ UNVERIFIED |
| SSSmith SS, LLC | Bowling Green | OH | — | ◇ UNVERIFIED |
| STSmith Tool & Machine, LLC | Temperance | MI | — | ◇ UNVERIFIED |
| SISmithworks Iron and Design Inc. | Decatur | GA | — | ◇ UNVERIFIED |
| SISmithworks Iron & Design, Inc. | Decatur | GA | — | ◇ 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 |
| SMS & M Ventures LLC | Draper | UT | — | ◇ UNVERIFIED |
| SMSmyth Metal Works LLC | Montpelier | VT | — | ◇ 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 |
| SOSolar of Michigan | Coopersville | MI | — | ◇ UNVERIFIED |
| STSolchroma Technologies INC | Billerica | MA | — | ◇ UNVERIFIED |
| SISolher Iron, Inc. | San Francisco | CA | — | ◇ UNVERIFIED |
| SPSolidification Products International, INC | North Haven | CT | — | ◇ UNVERIFIED |
| SRSolid Rock Gate Supply, INC Dba Welding Fabrication Services | Post Falls | ID | — | ◇ UNVERIFIED |
| SSSolid Scope Machining CO INC | Carson | CA | — | ◇ UNVERIFIED |
| SMSollock Metal Works, LLC | Clute | TX | — | ◇ UNVERIFIED |
| SSSol Signs & Graphics INC. | Columbia | MD | — | ◇ UNVERIFIED |
| SISomething in the Orange | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SMSondrol Machining LLC | Sunburg | MN | — | ◇ UNVERIFIED |
| SBSonja's Banners Plus, L.l.c. | Yuma | AZ | — | ◇ UNVERIFIED |
| SWSonoma Welding & Fabrication LLC | Cape May | NJ | — | ◇ UNVERIFIED |
| SCSonoran Capital Group, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| SPSooner Pipe Crosby Yard | Crosby | TX | — | ◇ UNVERIFIED |
| SISos/aaa Iron Works INC | Mobile | AL | — | ◇ UNVERIFIED |
| SPSouriau Paande Sequim | Sequim | WA | — | ◇ UNVERIFIED |
| SASouth Anna Stair & Rail | Norfolk | VA | — | ◇ UNVERIFIED |
| SASouth Austin Workshop, LLC | Austin | TX | — | ◇ UNVERIFIED |
| SBSouth Bay Iron, INC | Buena Park | CA | — | ◇ UNVERIFIED |
| SESoutheastern Engineering Sales INC | Colonial Heights | VA | — | ◇ UNVERIFIED |
| SMSoutheastern Metal Fabricator | Rockland | MA | — | ◇ UNVERIFIED |
| SPSoutheastern Plateworks | Birmingham | AL | — | ◇ UNVERIFIED |
| SSSoutheastern Sign Company INC | Brandon | MS | — | ◇ UNVERIFIED |
| SASouthern Aluminum Finishing D.b.a. Saf Metal Fab | Villa Rica | GA | — | ◇ UNVERIFIED |
| SASouthern Aluminum Finishing D.b.a. Saf Metal Fab | Atlanta | GA | — | ◇ UNVERIFIED |
| SBSouthern Boiler & Tank Works, Incorporat | Memphis | TN | — | ◇ UNVERIFIED |
| SCSouthern Custom Fabrication | Carencro | LA | — | ◇ UNVERIFIED |
| SESouthern Enterprises of Southeast Louisiana, INC. | Ponchatoula | LA | — | ◇ UNVERIFIED |
| SESouthern Erectors INC | Pensacola | FL | — | ◇ UNVERIFIED |
