| SISelecsource, INC. | Suwanee | GA | — | ◇ UNVERIFIED |
 Select Fabricators, INC. | Canandaigua | NY | — | ◇ UNVERIFIED |
| SMSelmco Metal Fabricators, INC. | Sidney | OH | — | ◇ UNVERIFIED |
| SISemco Incorporated | Roanoke | VA | — | ◇ UNVERIFIED |
| SOSenior Operations LLC Dba Senior Aerospace Metal Bellows | Sharon | MA | — | ◇ UNVERIFIED |
| SCSenju Comtek Corporation | San Jose | CA | — | ◇ UNVERIFIED |
| SSSentry Siren, INC. | Canon City | CO | — | ◇ UNVERIFIED |
| SHSeollo Holdings LLC | Riverside | CA | — | ◇ UNVERIFIED |
| SSerco | San Diego | CA | — | ◇ UNVERIFIED |
| SWSerenity Woodworks LLC | Chesapeake | VA | — | ◇ UNVERIFIED |
| SISerrano Industries | El Paso | TX | — | ◇ UNVERIFIED |
| SGService Graphics LLC | Rickreall | OR | — | ◇ UNVERIFIED |
| SPService Partners Gutter Supply LLC | Jackson | TN | — | ◇ UNVERIFIED |
| SPService Pro Sign & Lighting Maintenance LLC | Marlboro | NJ | — | ◇ UNVERIFIED |
| SWSetzers Welding and Manufacturing | Beatrice | NE | — | ◇ UNVERIFIED |
| SPSeven Peaks, LLC & Bratek Engineering & Manufacturing, Inc. | Denver | CO | — | ◇ UNVERIFIED |
| SGSfc Global Supply Chain, INC. | Pottstown | PA | — | ◇ UNVERIFIED |
| SFS & F Custom Sign CORP. | Hartselle | AL | — | ◇ UNVERIFIED |
| SFS & F Machining and Finishing, INC. | Kenosha | WI | — | ◇ UNVERIFIED |
| SLSggb, LLC | Sussex | WI | — | ◇ UNVERIFIED |
| SISg Investment America, INC | Vacaville | CA | — | ◇ UNVERIFIED |
| SBSGJB Business Holdings, Inc. | Circle Pines | MN | — | ◇ UNVERIFIED |
| SSSg Steel Services CO. | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| SVShady Vent Aluminum Products INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| SCShaklee CORP | Pleasanton | CA | — | ◇ UNVERIFIED |
| SIShaman Investment Ventures Inc. | Naples | FL | — | ◇ UNVERIFIED |
| SSShane Signs, LLC | Jamaica Plain | MA | — | ◇ UNVERIFIED |
| SMShapiro Metal Supply Company | Saint Louis | MO | — | ◇ UNVERIFIED |
| SISharpa, INC. | Cincinnati | OH | — | ◇ UNVERIFIED |
| SSShaun Squared LLC | Westville | IN | — | ◇ UNVERIFIED |
| SAShawn Adams | Seaside | CA | — | ◇ UNVERIFIED |
| SMSheet Metal Designs | Jamesport | MO | — | ◇ UNVERIFIED |
| SMSheet Metal Engineers, INC. | Martinez | GA | — | ◇ UNVERIFIED |
| SMSheet Metal Forms L.l.c. | Glendale | AZ | — | ◇ UNVERIFIED |
 Sheet Metal Solutions INC | Tangent | OR | — | ◇ UNVERIFIED |
| Sheet Metal Solutions INC | Tangent | OR | — | ◇ UNVERIFIED |
| SMSheet Metal Specialist of Edmond, LLC | Edmond | OK | — | ◇ UNVERIFIED |
| SMSheet Metal Specialties Inc | Bismarck | ND | — | ◇ UNVERIFIED |
| SMSheet Metal Specialties LLC | Monroe | LA | — | ◇ UNVERIFIED |
| SMSheet Metal Systems, INC | Pinellas Park | FL | — | ◇ UNVERIFIED |
| SMSheet Metal Unlimited PL Inc. | Sunrise | FL | — | ◇ UNVERIFIED |
| SMSheet Metal Works | West Valley City | UT | — | ◇ UNVERIFIED |
| SMSheet Metal Works LLC | Nashville | TN | — | ◇ UNVERIFIED |
| SMSheffield Metals, International | Denver | CO | — | ◇ UNVERIFIED |
| SIShellpro INC | Lockeford | CA | — | ◇ UNVERIFIED |
| SIShelton Industrial Pattern INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| SSSheridan Sheet Metal CO | New Hope | MN | — | ◇ UNVERIFIED |
| SUShick U.s.a. | Kansas City | MO | — | ◇ UNVERIFIED |
| SIShiloh Industries, LLC | Dover | PA | — | ◇ UNVERIFIED |
| SIShiloh Industries, LLC | New Freedom | PA | — | ◇ UNVERIFIED |
