- Institute-Respiratory & Sleep
- Integrated Liner Technologies
- Inter Print
- Interfaith Housing Dev
- Interfaith Housing Dev Corp
- Interstate Security Inc
- Inverter Systems Inc
- Iron Mountain
- Isaac Masel Co
- Italian Family Pizza
- Italian Mutual Aid-Fifth Ward
- Its Trucking
- Ivanhoe Industries Inc
- Ivanhoe Rubber Co Inc
- J & C Dollar Store
- J & R Personal Financial Inc
- J & S Inc
- J & T Hobbies
- J A Carosi Heating & Air
- J B Rogers Furniture
