| CIChromasource INC | Columbia City | IN | Paper Manufacturing322220 | 20-99 | ◐ LIKELY ACTIVE |
| BPBreyden Products LLC | Columbia City | IN | Textile Product Mills314994 | 20-99 | ◐ LIKELY ACTIVE |
| FWFort Wayne Foundry- Columbia City Div. I | Columbia City | IN | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
Numerix INC | Columbia City | IN | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| SDSteel Dynamics Structural | Columbia City | IN | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
Undersea Sensor Systems, INC. | Columbia City | IN | Computer and Electronic Product Manufacturing334511 | 500+ | ◐ LIKELY ACTIVE |
| CGCf Gomma USA INC | Columbia City | IN | Transportation Equipment Manufacturing336214 | — | ◐ LIKELY ACTIVE |
| HCHolmes & Company LLC | Columbia City | IN | Furniture and Related Product Manufacturing337215 | 20-99 | ◐ LIKELY ACTIVE |
| PWPdq Workholding LLC | Columbia City | IN | Fabricated Metal Product Manufacturing332111 | 100-499 | ◐ LIKELY ACTIVE |
| ESEssex Solutions USA LLC | Columbia City | IN | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| MEMc Equipment, LLC | Columbia City | IN | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| NLNovae LLC | Columbia City | IN | Machinery Manufacturing333924 | 20-99 | ◐ LIKELY ACTIVE |
| RCR & C Machining LLC | Columbia City | IN | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| SDSteel Dynamics, Inc. - Structural and Rail | Columbia City | IN | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| 1K107791 - Kc Jones Plating Company | Columbia City | IN | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| CCColumbia City Mill Services | Columbia City | IN | Nonmetallic Mineral Product Manufacturing327992 | — | ◐ LIKELY ACTIVE |
Reelcraft Industries Incorporated | Columbia City | IN | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| AMAdvanced Materials Development | Columbia City | IN | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| AFAlliance Feed | Columbia City | IN | Food Manufacturing311119 | 20-99 | ◐ LIKELY ACTIVE |
| DVDulcius Vineyards | Columbia City | IN | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| LCLear Corporation - Columbia City | Columbia City | IN | Transportation Equipment Manufacturing336360 | 500+ | ◐ LIKELY ACTIVE |
| LELevy Environmental Services Company dba Columbia City Mill Services | Columbia City | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| LFLignetics - Forest Energy OR | Columbia City | OR | Wood Product Manufacturing321999 | 20-99 | ◐ LIKELY ACTIVE |
| MDMedical Division | Columbia City | IN | Machinery Manufacturing333515 | 1-19 | ◐ LIKELY ACTIVE |
| P1Plant 1 | Columbia City | IN | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| PCPyrotek Columbia City | Columbia City | IN | Nonmetallic Mineral Product Manufacturing327999 | 20-99 | ◐ LIKELY ACTIVE |
| SStafco | Columbia City | IN | Fabricated Metal Product Manufacturing332420 | 20-99 | ◐ LIKELY ACTIVE |