National Electrical Carbon Products, INC | Fostoria | OH | Electrical Equipment, Appliance & Component Manufacturing335991 | 100-499 | ● ACTIVE |
| PBPoet Biorefining - Fostoria LLC (0374010235) | Fostoria | OH | Chemical Manufacturing325193 | 20-99 | ● ACTIVE |
Archer Daniels Midland Company | Fostoria | OH | Food Manufacturing311222 | — | ◐ LIKELY ACTIVE |
| MMMennel Milling CO | Fostoria | OH | Food Manufacturing311211 | — | ◐ LIKELY ACTIVE |
| RCRoppe Corporation (0374010077) | Fostoria | OH | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| AAutolite (0374010117) | Fostoria | OH | Transportation Equipment Manufacturing336320 | — | ◐ LIKELY ACTIVE |
| ITInland Tarp & Liner LLC | Fostoria | OH | Textile Product Mills314910 | — | ◐ LIKELY ACTIVE |
| NUNox US LLC (0374012005) | Fostoria | OH | Plastics and Rubber Products Manufacturing326130 | — | ◐ LIKELY ACTIVE |
| ACAlpha Coatings, INC. | Fostoria | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MPMaterial Processing and Handling CO | Fostoria | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| SWSeneca Wire & Mfg CO * | Fostoria | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| TCThyssenkrupp Crankshaft CO LLC | Fostoria | OH | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| AMAviation MFG | Fostoria | OH | Machinery Manufacturing333517 | 20-99 | ◐ LIKELY ACTIVE |
| CGCustom Glass Solutions | Fostoria | OH | Nonmetallic Mineral Product Manufacturing327215 | 100-499 | ◐ LIKELY ACTIVE |
| CGCustom Glass Solutions Fostoria, LLC | Fostoria | OH | Nonmetallic Mineral Product Manufacturing327215 | — | ◐ LIKELY ACTIVE |
| FFFilmtec Fabrications, LLC | Fostoria | OH | Machinery Manufacturing333519 | 20-99 | ◐ LIKELY ACTIVE |
| IFITL Fostoria | Fostoria | OH | Textile Product Mills314910 | 20-99 | ◐ LIKELY ACTIVE |
| MMMennel Milling Fostoria Mill | Fostoria | OH | Food Manufacturing311211 | 100-499 | ◐ LIKELY ACTIVE |
| MPMennex Processing & Packing | Fostoria | OH | Food Manufacturing311824 | 20-99 | ◐ LIKELY ACTIVE |
| NCNSI Crankshaft | Fostoria | OH | Transportation Equipment Manufacturing336310 | 20-99 | ◐ LIKELY ACTIVE |
| THThe Honey Bee Winery | Fostoria | OH | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| ACAlpha Coatings INC. | Fostoria | OH | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BGBoc Gases | Fostoria | OH | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| CPCallies Performance Products, INC. | Fostoria | OH | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| IPInnovation Plastics LLC | Fostoria | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| KRKohart Recycling of Fostoria | Fostoria | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MTMachine Tool Design & Fab LLC | Fostoria | OH | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| NBNorth Branch Machining & Engineering | Fostoria | MI | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| NUNox US | Fostoria | OH | Plastics and Rubber Products Manufacturing326112 | — | ◇ UNVERIFIED |
| OIO.k. Industries, INC. | Fostoria | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| PBPoet Bioprocessing | Fostoria | OH | Chemical Manufacturing325193 | — | ◇ UNVERIFIED |
| TUThe UrbanWoody Brewery | Fostoria | OH | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |