| RERaf Electronic Hardware | Seymour | CT | Fabricated Metal Product Manufacturing332721 | 100-499 | ◐ LIKELY ACTIVE |
| TAThe Andersons Seymour Terminal | Seymour | IN | Chemical Manufacturing325311 | — | ◐ LIKELY ACTIVE |
| VLValeo Lighting Systems NA LLC | Seymour | IN | Electrical Equipment, Appliance & Component Manufacturing335110 | — | ◐ LIKELY ACTIVE |
| WRWhite River Soy Processing LLC | Seymour | IN | Food Manufacturing311224 | — | ◐ LIKELY ACTIVE |
| AUAisin USA Mfg INC | Seymour | IN | Transportation Equipment Manufacturing336350 | — | ◐ LIKELY ACTIVE |
| OAO&k American CORP | Seymour | IN | Primary Metal Manufacturing331111 | — | ◐ LIKELY ACTIVE |
| PPPerformance Pallet CORP | Seymour | WI | Wood Product Manufacturing321920 | 100-499 | ◐ LIKELY ACTIVE |
| CICummins Industrial Center | Seymour | IN | Machinery Manufacturing333618 | — | ◐ LIKELY ACTIVE |
| EREmmi Roth USA - Seymour | Seymour | WI | Food Manufacturing311513 | 20-99 | ◐ LIKELY ACTIVE |
| HPHome Products International INC | Seymour | IN | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| SPSchwarz Pharma Mfg. | Seymour | IN | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| BLBlalocks Lumber Company Concrete Plant 3 | Seymour | TN | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| ACABIMP Contech Engineered Solutions LLC | Seymour | TX | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| ABAxehead Beverage Company LLC | Seymour | MO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| CECjb Enterprise LLC | Seymour | TN | Food Manufacturing311919 | — | ◐ LIKELY ACTIVE |
| CACort Acres Breaker Plant | Seymour | IN | Food Manufacturing311999 | — | ◐ LIKELY ACTIVE |
| CSCummins Seymour Engine Plant | Seymour | IN | Machinery Manufacturing333618 | 500+ | ◐ LIKELY ACTIVE |
| DVDon Virgilio Winery & Vineyards | Seymour | MO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| EMExcel Manufacturing Inc. | Seymour | IN | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| FFabrication | Seymour | CT | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| GBGuardian Bikes | Seymour | IN | Transportation Equipment Manufacturing336991 | 100-499 | ◐ LIKELY ACTIVE |
Indiana Oxygen Company-Seymour | Seymour | IN | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| IHInduction Heat Treating Seymour Corp | Seymour | IN | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| KVKaren's Vineyard & Winery | Seymour | IN | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
Kenney Orthopedics of Seymour, LLC | Seymour | IN | Miscellaneous Manufacturing339113 | — | ◐ LIKELY ACTIVE |
| LALambs and Vines Winery, INC | Seymour | MO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| LGLydia Grove Estate Winery | Seymour | IN | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| MHMadden Hill Vineyard & Winery, LLC | Seymour | IN | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| MOMan of Steel Welding Services LLC | Seymour | CT | Fabricated Metal Product Manufacturing332323 | — | ◐ LIKELY ACTIVE |
| NSNippon Steel Pipe America Inc | Seymour | IN | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| OAO&k American - Seymour Plant | Seymour | IN | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| PDPorta Door Co., Inc. | Seymour | CT | Furniture and Related Product Manufacturing337110 | 20-99 | ◐ LIKELY ACTIVE |
| PFProvimi Foods, Inc. | Seymour | WI | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| PFProvimi Foods, Inc. | Seymour | WI | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SFSeymour Facility | Seymour | MO | Transportation Equipment Manufacturing336212 | 100-499 | ◐ LIKELY ACTIVE |
| SPSilgan Plastics | Seymour | IN | Plastics and Rubber Products Manufacturing326160 | 100-499 | ◐ LIKELY ACTIVE |
| SSSmalltown Spirits | Seymour | IN | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| SPSpaceGuard Products | Seymour | IN | Fabricated Metal Product Manufacturing332618 | 20-99 | ◐ LIKELY ACTIVE |
| TGThule Group | Seymour | CT | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| TSTRG Seymour | Seymour | IN | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| VMValent Mid-West Agricultural Research Center (MWARC) | Seymour | IL | Chemical Manufacturing325320 | 1-19 | ◐ LIKELY ACTIVE |
| VValeo | Seymour | IN | Transportation Equipment Manufacturing336320 | 500+ | ◐ LIKELY ACTIVE |
| WOWhispering Oaks Vineyard & Winery | Seymour | MO | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |