| BOBruce Oakley INC | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CCCarus Chemical CO | Ottawa | IL | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| CRCimco Recycling Ottawa INC | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CCovia | Ottawa | IL | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| PGPeltier Glass Site | Ottawa | IL | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| SASigan America LLC | Ottawa | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| SRStarved Rock Adventures, INC. | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| AWAllied Waste Services of North America LLC | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| BBB & B Electronics Manufacturing Company | Ottawa | IL | Computer and Electronic Product Manufacturing334111 | — | ◇ UNVERIFIED |
| CWClifford W. Estes, Co., INC. | Ottawa | IL | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| CAConroys Amoco | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ELExpress Lane INC 59 | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| FMF & M Landscape | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ICIllinois Cement CO LLC | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| JOJmp Ottawa Petroleum | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| JPJohnson Pattern and Machine Works, INC. | Ottawa | IL | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| LTLmk Technologies | Ottawa | IL | Textile Product Mills314999 | — | ◇ UNVERIFIED |
| MBMidwest Barge Terminal LLC | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| OFOttawa Forward Warehouse, Ottawa Illinois | Ottawa | IL | Food Manufacturing311611 | — | ◇ UNVERIFIED |
| PEProactive Environmental Services | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SOShell Oasis | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
 Southern Precision Sands LLC | Ottawa | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| SSSouthside Shell | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCStott Contracting LLC | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| VSVoss Sandworks West | Ottawa | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
