| SSaukville | Saukville | WI | Fabricated Metal Product Manufacturing332913 | 20-99 | ◐ LIKELY ACTIVE |
Savannah Company, LLC | Waunakee | WI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SFScot Forge - Clinton | Clinton | WI | Fabricated Metal Product Manufacturing332111 | 100-499 | ◐ LIKELY ACTIVE |
| SIScot Industries - Muscoda | Muscoda | WI | Fabricated Metal Product Manufacturing332813 | 100-499 | ◐ LIKELY ACTIVE |
| SIScot Industries - Pewaukee | Pewaukee | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| SFSharpe Fabrication Inc | New Berlin | WI | Fabricated Metal Product Manufacturing332323 | 20-99 | ◐ LIKELY ACTIVE |
| S1Shop 1 | Marshfield | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| SCSilgan Containers Corporate Center Drive | Oconomowoc | WI | Fabricated Metal Product Manufacturing332431 | 100-499 | ◐ LIKELY ACTIVE |
| SCSilgan Containers Menomonie | Menomonie | WI | Fabricated Metal Product Manufacturing332431 | 100-499 | ◐ LIKELY ACTIVE |
| STSjoberg Tool & Manufacturing Corp. South Facility | Hartland | WI | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| SMSL Montevideo Technology, Inc - Muskego | Muskego | WI | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| SISnap-on Incorporated | Kenosha | WI | Fabricated Metal Product Manufacturing332216 | — | ◐ LIKELY ACTIVE |
| SPSOS Prescott, Inc. | Prescott | WI | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| SISpecSys Inc Prentice | Prentice | WI | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SBSpincraft Beloit | New Berlin | WI | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| SISpiros Industires, Inc | West Bend | WI | Fabricated Metal Product Manufacturing332613 | 20-99 | ◐ LIKELY ACTIVE |
| SMSPVG Marinette | Marinette | WI | Fabricated Metal Product Manufacturing332420 | 100-499 | ◐ LIKELY ACTIVE |
| SStandard | Saukville | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| SIStandard Iron Sumner | Hartford | WI | Fabricated Metal Product Manufacturing332313 | 100-499 | ◐ LIKELY ACTIVE |
| SCSt Croix Falls | Saint Croix Falls | WI | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| SCSt Croix Machine Tool | Somerset | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| SMStecker Machine Co., Inc. | Manitowoc | WI | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| SCStructural Components Corporation | Green Bay | WI | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| SPSummit Place | West Allis | WI | Fabricated Metal Product Manufacturing332311 | 100-499 | ◐ LIKELY ACTIVE |
| SSSunspan Systems INC | New Berlin | WI | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| SCSupreme Cores Holdings, LLC - Milwaukee, WI Facility | Milwaukee | WI | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| STSwanstrom Tools USA | Superior | WI | Fabricated Metal Product Manufacturing332216 | 20-99 | ◐ LIKELY ACTIVE |
Synergy Manufacturing Services LLC | Grafton | WI | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SLSystems, LLC (Plant 2) | Richfield | WI | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| TTTank Technology, inc. | Princeton | WI | Fabricated Metal Product Manufacturing332420 | 20-99 | ◐ LIKELY ACTIVE |
| TMT&d Machine, INC. | Butler | WI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| TMTenere Metals Division Dresser | Dresser | WI | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| TMTenere Metals Division Osceola | Osceola | WI | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| TWTenneco - Waupun | Waupun | WI | Fabricated Metal Product Manufacturing332117 | 100-499 | ◐ LIKELY ACTIVE |
| TBTHE BLAST SHOP LLC - Location 1 | Kenosha | WI | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| TBTHE BLAST SHOP LLC - Location 2 | Kenosha | WI | Fabricated Metal Product Manufacturing332812 | 1-19 | ◐ LIKELY ACTIVE |
| TKThe Kinetic Co., Inc. | Greendale | WI | Fabricated Metal Product Manufacturing332216 | 100-499 | ◐ LIKELY ACTIVE |
| TVThe Vollrath Company LLC., Kewaunee East | Kewaunee | WI | Fabricated Metal Product Manufacturing332215 | 20-99 | ◐ LIKELY ACTIVE |
| TVThe Vollrath Company LLC., Sheboygan | Sheboygan | WI | Fabricated Metal Product Manufacturing332215 | 500+ | ◐ LIKELY ACTIVE |
| TMTk Machine LLC | Elroy | WI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| TMTobin Machining, Inc. | Fond Du Lac | WI | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| TMTomahawk Manufacturing, Inc. (Hartland) | Hartland | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| TNTop Notch Welding INC | De Forest | WI | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| TNTop Notch Welding INC | Deforest | WI | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| TDTransmotion - De Pere | De Pere | WI | Fabricated Metal Product Manufacturing332912 | 20-99 | ◐ LIKELY ACTIVE |
Trigger Precision Products INC | Janesville | WI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| TDTritek Defense Products | Ashland | WI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| USUnited States Supply Network LLC | Wausau | WI | Fabricated Metal Product Manufacturing332119 | — | ◐ LIKELY ACTIVE |
| UWUnited Welding & Mfg. Co., Inc. | Cudahy | WI | Fabricated Metal Product Manufacturing332313 | 20-99 | ◐ LIKELY ACTIVE |
| UAUS Aluminum Inc | Wauwatosa | WI | Fabricated Metal Product Manufacturing332431 | 20-99 | ◐ LIKELY ACTIVE |