| RIRegal Industrial Corporation | Donora | PA | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| RSReynolds Services INC | Greenville | PA | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| RMRivers Metal Products INC | Lincoln | NE | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SISabre Industries | Fort Worth | TX | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SFSapulpa Faclty | Sapulpa | OK | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SSSchenectady Steel CO INC | Schenectady | NY | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
Schuff Steel Midwest | Ottawa | KS | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SSSeah Steel USA | Houston | TX | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| SMService Machine | Dothan | AL | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| SLShaw Lake Charles LLC | Lake Charles | LA | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
Shepard Steel CO INC | Hartford | CT | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SISinco, INC. | Conway | AR | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SCSippel CO INC Dba Sippel Steel Fab | Ambridge | PA | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SJSmi Joist:cayce | Cayce | SC | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SCSoutheastern Construction & Maintenance | Mulberry | FL | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SOSouthern Ohio Fabricators | Batavia | OH | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SCStandard Coating INC. | Madison Hts | MI | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SIStandard Iron Works | Scranton | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SBSteel Boss International | Dallas | TX | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
Steelfab INC of Alabama | Roanoke | AL | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
Steel Structures, INC. | Madera | CA | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SWSteel West Incorporated | Pocatello | ID | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SESterling Engineering & Fabrication | Carrollton | GA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SBStone Bridge Iron and Steel INC | Gansevoort | NY | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SMSummertown Metals LLC | Summertown | TN | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SMSunbelt Metals & Manufacturing | Apopka | FL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SKSunland Kori Services LLC | Eunice | LA | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| SISwf Industrial | Wrightsville | PA | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| SISwva INC | Huntington | WV | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| SFSystems Fab & Machine, INC. | El Dorado | AR | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| TTassco | Birmingham | AL | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| TFTate Fabricating Company, INC | White House | TN | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| TITishler Industries INC | Saint Louis | MO | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| TITitan Industries | Spring | TX | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| TSTri-fab Steel INC | Birmingham | AL | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
Trinity Design Group LLC | Pell City | AL | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| TFTrinity Fabricators INC | Green Cove Springs | FL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| UMUnique Metal Fabrication INC | Pittsburg | KS | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| UIUnistrut International Corporation | Wayne | MI | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| USUniversal Steel INC | Lithonia | GA | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| USUniversal Steel of Nc, LLC | Thomasville | NC | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| VJValley Joist | Fort Payne | AL | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| VMValley Machine Company, INC. | Alexandria | AL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| VMVestal Manufacturing Company | Sweetwater | TN | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| VIVfp INC | Duffield | VA | Nonmetallic Mineral Product Manufacturing327390 | 100-499 | ◐ LIKELY ACTIVE |
| VLV & L Tool LLC | Waukesha | WI | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| WSWabash Steel Company LLC | Vincennes | IN | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| WLWald L L C | Maysville | KY | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| WIWare Industries, INC. D/b/a Marino/ware | East Chicago | IN | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| WTWatco Tanks INC. | Floresville | TX | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |