| RCRuskin CO. - Parsons | Parsons | KS | — | ◇ UNVERIFIED |
| RWR W Harper and Son, INC. | Richmond | VA | — | ◇ UNVERIFIED |
| RMRW Metal Spinning Inc | San Leandro | CA | — | ◇ UNVERIFIED |
| SFSacco Family Limited Partnership | Mankato | MN | — | ◇ UNVERIFIED |
| SESae Engineering, INC. | Morgan Hill | CA | — | ◇ UNVERIFIED |
| SAS & a Enterprises, Incorporated | Rosedale | MD | — | ◇ UNVERIFIED |
| SHSalem Heating & Sheet Metal INC | Salem | OR | — | ◇ UNVERIFIED |
| SHSalem Heating & Sheet Metal INC | Salem | OR | — | ◇ UNVERIFIED |
| SHSalem Heating & Sheet Metal INC | Dallas | 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 |
| SSSanmina - Sci | Newark | 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 |
| SFSchwabel Fabricating Com INC | Tonawanda | NY | — | ◇ 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 | Roanoke | VA | — | ◇ UNVERIFIED |
| SISemco Incorporated | Morrilton | AR | — | ◇ 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 |
| SPSheco Plant 2 | Tuscaloosa | AL | — | ◇ 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 |
| SUShick U.s.a. | Kansas City | MO | — | ◇ UNVERIFIED |
| SIShiloh Industries, LLC | New Freedom | PA | — | ◇ UNVERIFIED |
| SIShiloh Industries, LLC | Dover | PA | — | ◇ UNVERIFIED |
| SHS & H Metal Products Inc | Topeka | IN | — | ◇ UNVERIFIED |
| SRShon Reim | San Jacinto | CA | — | ◇ UNVERIFIED |
| SRShon Reim | Temecula | CA | — | ◇ UNVERIFIED |
| SIShouldice Industrial Manufacturers & Contractors INC. | Battle Creek | MI | — | ◇ UNVERIFIED |
| SBSign Builders, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| SCSii Companies, INC. | Sun Valley | CA | — | ◇ UNVERIFIED |
| SSSilver Stone Sheet Metal Fabrications Corp. | Brooklyn | NY | — | ◇ UNVERIFIED |
| SSSilver Stone Sheet Metal Fabrications Corp. | Millstone Township | NJ | — | ◇ UNVERIFIED |
| SISimar Industries, INC. | Ocala | FL | — | ◇ UNVERIFIED |
| SJS & J Tube, INC. | Wapello | IA | — | ◇ UNVERIFIED |
| SFSka Fab Steel, LLC | Durango | CO | — | ◇ UNVERIFIED |
| SCSketch Consulting INC | North Hills | CA | — | ◇ UNVERIFIED |
| SMSlabaugh Metal Fab | Bremen | IN | — | ◇ UNVERIFIED |
| SMSlatem Metals LLC | Great Falls | MT | — | ◇ UNVERIFIED |
| SISlaughter Industrial Fabrication Company, LLC | Houston | TX | — | ◇ UNVERIFIED |
| SMSlh Metals | Corunna | MI | — | ◇ UNVERIFIED |
| SLS. L. M., Inc. | Broadview Heights | OH | — | ◇ UNVERIFIED |
| SMSmart Metals | Lawrence | MA | — | ◇ UNVERIFIED |
| SVSmart Vent Products Inc | Juno Beach | FL | — | ◇ UNVERIFIED |
| SESmithco Engineering INC | Tulsa | OK | — | ◇ UNVERIFIED |
| SWSmith Welding | Cedartown | GA | — | ◇ UNVERIFIED |
| SISms Industries LLC | Hamden | CT | — | ◇ UNVERIFIED |
| SISmt Incorporated - Raleigh Plant | Raleigh | NC | — | ◇ UNVERIFIED |
| SASnappy Adp Div of Standex International | Detroit Lakes | MN | — | ◇ UNVERIFIED |
| SMSnappy Manufacturing | Medina | NY | — | ◇ UNVERIFIED |
| SSSnodgrass Sheet Metal | Lanett | AL | — | ◇ UNVERIFIED |
| SISnyder Industries | Houston | TX | — | ◇ UNVERIFIED |
| SSSolutions Sheetmetal Inc. | Brooklyn | NY | — | ◇ UNVERIFIED |
| STSo-semi Technologies Dba Optopax | San Jose | CA | — | ◇ UNVERIFIED |
| SSSouthbridge Sheet Metal | Southbridge | MA | — | ◇ UNVERIFIED |
| SCSouth County Sheet Metal & Specialties INC | La Pine | OR | — | ◇ UNVERIFIED |
| SMSoutheastern Metal Products LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| SMSoutheastern Metals | Jacksonville | FL | — | ◇ UNVERIFIED |
| SSSoutheastern Stud & Components, INC. | Montgomery | AL | — | ◇ UNVERIFIED |
| STSoutheastern Tool & Die | Aberdeen | NC | — | ◇ UNVERIFIED |
 Southern Fabricators, INC. | Polkton | NC | — | ◇ UNVERIFIED |
| SHSouthern Heat Exchanger | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| SSSouthern Sheet Metal, INC. | Suffolk | VA | — | ◇ UNVERIFIED |
