| RIRennco INC | Homer | MI | Machinery Manufacturing333993 | 20-99 | ◐ LIKELY ACTIVE |
| RERiley Equipment | Vincennes | IN | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| RSRmf Steel Products | Grandview | MO | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| RPRoper Pump Company | Commerce | GA | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| RURoxell USA INC | Anderson | MO | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| RMRuland Manufacturing CO. INC | Marlborough | MA | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| SCSaelens CORP | Johnson Creek | WI | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
Schroeder Industries | Cumberland | MD | Machinery Manufacturing333999 | 20-99 | ◐ LIKELY ACTIVE |
| SIScotchman Industries INC | Philip | SD | Machinery Manufacturing333512 | 20-99 | ◐ LIKELY ACTIVE |
| SMScreen Machine Industries LLC | Pataskala | OH | Machinery Manufacturing333120 | 20-99 | ◐ LIKELY ACTIVE |
| SMSemco Morrilton | Morrilton | AR | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| SCSev-rend CORP | Collinsville | IL | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| SESew Eurodrive INC | Hayward | CA | Machinery Manufacturing333611 | 20-99 | ◐ LIKELY ACTIVE |
| SSSeymour Sheridan INC | Monroe | CT | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| SPShuman Plastics INC | Depew | NY | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| SISkoflo Industries INC | Woodinville | WA | Fabricated Metal Product Manufacturing332911 | 20-99 | ◐ LIKELY ACTIVE |
| SCSkutt Ceramic Products, INC. | Portland | OR | Machinery Manufacturing333994 | 20-99 | ◐ LIKELY ACTIVE |
| SMSmalley Manufacturing CO. INC. | Knoxville | TN | Machinery Manufacturing333922 | 20-99 | ◐ LIKELY ACTIVE |
| SDSolitron Devices INC | West Palm Beach | FL | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| SESterling Electric | Indianapolis | IN | Machinery Manufacturing333612 | 20-99 | ◐ LIKELY ACTIVE |
| SLSt Louis Gear CO INC | Keokuk | IA | Machinery Manufacturing333612 | 20-99 | ◐ LIKELY ACTIVE |
| SMSummers Manufacturing CO | Devils Lake | ND | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| SMSund Manufacturing | Newburg | ND | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| SFSuperior Fabrication CO LLC | Kincheloe | MI | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| SWSuperior Welding & Manufacturing INC | Hermansville | MI | Machinery Manufacturing333318 | 20-99 | ◐ LIKELY ACTIVE |
| SPSweco Products, INC. | Sutter | CA | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| SISyncroflo INC | Norcross | GA | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| SESystems Engineering & Sales CO | Fort Wayne | IN | Machinery Manufacturing333911 | 20-99 | ◐ LIKELY ACTIVE |
| TMTabor Machine Company | Princeton | WV | Machinery Manufacturing333131 | 20-99 | ◐ LIKELY ACTIVE |
| TTTawas Tool Company | East Tawas | MI | Machinery Manufacturing333515 | 20-99 | ◐ LIKELY ACTIVE |
| TTTaylor-winfield Technologies, INC. | Youngstown | OH | Machinery Manufacturing333511 | 20-99 | ▲ REPORTED CLOSED |
| TRTei Rock Drills INC | Montrose | CO | Machinery Manufacturing333120 | 20-99 | ◐ LIKELY ACTIVE |
| TATessy Automation LLC | Meadville | PA | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| TTTexas Toolmakers, INC. | San Antonio | TX | Fabricated Metal Product Manufacturing332710 | 20-99 | ▲ REPORTED CLOSED |
| TEThermal Engineering Corporation | Columbia | SC | Machinery Manufacturing333994 | 20-99 | ◐ LIKELY ACTIVE |
| TPThermo Products, LLC. | Denton | NC | Machinery Manufacturing333414 | 20-99 | ◐ LIKELY ACTIVE |
| TWThe Witte Company INC | Washington | NJ | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| TITimberpro INC | Shawano | WI | Machinery Manufacturing333120 | 20-99 | ◐ LIKELY ACTIVE |
| TWTitan West | Linn | KS | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| TMTitletown Manufacturing | Green Bay | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
Topcon Positioning Systems | Fort Atkinson | WI | Machinery Manufacturing333997 | 20-99 | ◐ LIKELY ACTIVE |
| TCTower Components, INC. | Ramseur | NC | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| THTwo Harbors Machine Shop | Two Harbors | MN | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| UEUnion Electric Steel Corporation | Valparaiso | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| UTUnion Tool CORP the | Warsaw | IN | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| UIUniversal Industries | Cedar Falls | IA | Machinery Manufacturing333922 | 20-99 | ◐ LIKELY ACTIVE |
| VMValley Machine Company, INC. | Alexandria | AL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| VVVenco Venturo LLC | Cincinnati | OH | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| VMVista Metals INC | Mc Keesport | PA | Machinery Manufacturing333514 | 20-99 | ◐ LIKELY ACTIVE |
| VMVrc Metal Systems LLC | Box Elder | SD | Machinery Manufacturing333519 | 20-99 | ◐ LIKELY ACTIVE |