- Innovative Print and Media Group, Inc.
- Inova Alexandria Hospital
- Inova Fair Oaks Hospital
- Inova Fairfax Hospital
- Inova Loudoun Hospital
- Inova Mount Vernon Hospital
- InSight 3
- Insight Chicago
- Insightful
- Inspira Health Network
- Inspire Specialty Hospital
- Inspired Life Cremation
- Inspired Life Memorials & Cremation
- Institute For HealthCare Improvement IHI)
- Institute for the Puerto Rican Hispanic Elderly, Inc.
- Institute of Environmental Sciences and Technology
- Instituto de Guencios Forenses
- Instrumentation Group
- Insurance Women of Buffalo, Inc.
- Integrated Alliance L.P.
- Integrated Circuit Systems Inc.
- Integrated Electrical Services, Inc.
- Integrated Software Solutions, Inc.
- Integrex
- INTEGRIS Bass Baptist Medical Center
- INTEGRIS Canadian Valley Hospital
- INTEGRIS Grove Hospital
- INTEGRIS Health
- INTEGRIS Health Baptist Medical Center Portland Avenue
- INTEGRIS Health Edmond Hospital
- INTEGRIS Health Miami Hospital
- 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