- Integris Health Ponca City Hospital
- INTEGRIS Southwest Medical Center
- Integrium
- Intellivolve
- InterAct. Public Safety Systems
- Interamerican Bank
- Interchurch Center
- Interdigital Communications Corp.
- Interfaith Medical Center
- Interim HealthCare
- Interim HealthCare of Lake Superior
- Interiors Market Place - The Floor Club
- Interiors Marketplace - Baltimore Flooring
- Intermarket Corp.
- Intermountain Clinical Research
- Intermountain End-Stage Renal Disease Network, Inc,
- Intermountain Healthcare
- Intermountain Medical Center
- Intermountain Tissue Center
- Internal Revenue Service
- International Association for Exhibition Management IAEM)
- International Association for Organ Donation
- International Association of Chief of Police
- International Association of Convention and Visitor Bureaus
- International Association of Convention and Visitors Bureau
- International Association of Lighting Designers
- International Association of Refrigerated Warehouses
- International Biometric Association
- International Black Women's Congress
- International Code Council
- International Dairy Foods Association
- International Destinations, Inc.
- International Erosion Control Association
- International Freight Forwarders Customs Brokers Association of New Orleans
- International Hearing Society
- International History Week Awards Committee
- International Imaging Materials, Inc
- International Institute of Wisconsin Inc.
- International Life Sciences Institute
- International Lighthouse Group, Inc.
- International Loss Preventions, Inc.
- International Magnesium Association
- International Managed Care Service of Puerto Rico, Inc.
- International Managed Care Services
- International Marketing Managers
- International Mutual Assistance Association
- International Palms Hotel International Drive, Orlando
- International Paper
- International Paper, Inc.
- International Police Mountain Bike Association