| AIAk Industries, INC. Plant 3 | Plymouth | IN | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| BIBomarko, INC. | Plymouth | IN | Paper Manufacturing322220 | 20-99 | ◐ LIKELY ACTIVE |
| PFPlymouth Foundry Incorporated | Plymouth | IN | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| AIAK Industries Plant 2 | Plymouth | IN | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| AIAK Industries Plant 4 | Plymouth | IN | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| CMComplexus Medical Plymouth | Plymouth | IN | Miscellaneous Manufacturing339112 | 20-99 | ◐ LIKELY ACTIVE |
| IWIndiana Wheel Company, LLC | Plymouth | IN | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| LBLaSalle Bristol PIN 3801 | Plymouth | IN | Plastics and Rubber Products Manufacturing326191 | 20-99 | ◐ LIKELY ACTIVE |
| LCLear Corporation - Plymouth | Plymouth | IN | Transportation Equipment Manufacturing336320 | 20-99 | ◐ LIKELY ACTIVE |
| PPPatty Processing, Inc. | Plymouth | IN | Paper Manufacturing322220 | 20-99 | ◐ LIKELY ACTIVE |
| PIPlymouth IN - Valmont Telecommunications, Inc. | Plymouth | IN | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| RPRBC Plymouth | Plymouth | IN | Fabricated Metal Product Manufacturing332991 | 20-99 | ◐ LIKELY ACTIVE |
| UGU.S. Granules Corporation - Plymouth Facility | Plymouth | IN | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| VPViking Paper Corp. | Plymouth | IN | Paper Manufacturing322211 | 20-99 | ◐ LIKELY ACTIVE |
| WGWitt Galvanizing - Plymouth, LLC | Plymouth | IN | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |