| SHSalem Heating & Sheet Metal INC | Dallas | OR | — | ◇ UNVERIFIED |
| SHSalem Heating & Sheet Metal INC | Salem | OR | — | ◇ UNVERIFIED |
| SHSalem Heating & Sheet Metal INC | Salem | OR | — | ◇ UNVERIFIED |
| SHSalem Heating & Sheet Metal INC | Salem | OR | — | ◇ UNVERIFIED |
| SHSalem Heating & Sheet Metal INC | Salem | OR | — | ◇ UNVERIFIED |
| SSSan-co Steel, LTD | Donna | TX | — | ◇ UNVERIFIED |
| SMSan Mateo, INC. | Bensenville | IL | — | ◇ UNVERIFIED |
| SCSanmina Corporation | Fremont | CA | — | ◇ UNVERIFIED |
| SSanmina-sci | Westbrook | ME | — | ◇ UNVERIFIED |
| SFSanta Fe Enameling & Metal Finishing CO | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| SMSantee Metal Works LLC | Littleton | CO | — | ◇ UNVERIFIED |
| SISaqaf Inc. | Dallas | TX | — | ◇ UNVERIFIED |
| SSScafco Steel Stud Manufacturing | Stockton | CA | — | ◇ UNVERIFIED |
| SCSchefers Construction Services INC. | Grain Valley | MO | — | ◇ UNVERIFIED |
| SFSchetchl Fab LLC | Newark | NJ | — | ◇ UNVERIFIED |
| SSSchneider Simpson Sheet Metal | Tacoma | WA | — | ◇ UNVERIFIED |
| SMScreed Master Products INC | El Cajon | CA | — | ◇ UNVERIFIED |
| SSScs Sheet Metal | Grain Valley | MO | — | ◇ UNVERIFIED |
| STSeal Tite LLC | Hillsboro | OH | — | ◇ UNVERIFIED |
| SCSechrist-hall CO | Corpus Christi | TX | — | ◇ UNVERIFIED |
| SMSedalia Machine Works Inc.* | Sedalia | MO | — | ◇ UNVERIFIED |
| SCSeelye Craftsman CO | Minneapolis | MN | — | ◇ UNVERIFIED |
| SISelecsource, INC. | Suwanee | GA | — | ◇ UNVERIFIED |
| SDSemco Duct and Acoustical Products, INC. | Roanoke | VA | — | ◇ UNVERIFIED |
| SISemco Incorporated | Morrilton | AR | — | ◇ UNVERIFIED |
| SISemco Incorporated | Roanoke | VA | — | ◇ UNVERIFIED |
| SSSemco Southeastern Metals | Jacksonville | FL | — | ◇ UNVERIFIED |
| SCSenju Comtek Corporation | San Jose | CA | — | ◇ UNVERIFIED |
| SCSerra CORP. | Nevada City | CA | — | ◇ UNVERIFIED |
| SISerrano Industries | El Paso | TX | — | ◇ UNVERIFIED |
| SMService Metal Fabricating INC | Rockaway | NJ | — | ◇ UNVERIFIED |
| SPService Partners Gutter Supply LLC | Jackson | TN | — | ◇ UNVERIFIED |
| SWSetzers Welding and Manufacturing | Beatrice | NE | — | ◇ UNVERIFIED |
| SPSeven Peaks, LLC & Bratek Engineering & Manufacturing, Inc. | Denver | CO | — | ◇ UNVERIFIED |
| SSSg Steel Services CO. | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| SVShady Vent Aluminum Products INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| SCShaklee CORP | Pleasanton | 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 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 |
| SIShelton Industrial Pattern INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| SSSheridan Sheet Metal CO | New Hope | MN | — | ◇ UNVERIFIED |
