- Dietrich Industries, Inc.
- Digital Audiovisual Services Inc.
- Digital Designs Inc.
- Digital Preservation Strategies
- Dignity Health - Mercy General Medical Center
- Dignity Health - Mercy Hospital of Folsom
- Dignity Health - Methodist Hospital of Sacramento
- Dignity Health - Sierra Nevada Memorial Hospital
- Dignity Health - St. Rose Dominican Hospitals, Rose de Lima Campus
- Dignity Health - St. Rose Dominican Hospitals, San Martin Campus
- Dignity Health - St. Rose Dominican Hospitals, Siena Campus
- Dignity Health - Woodland Memorial Hospital
- Dignity Health Arizona General Hospital
- Dignity Health AZ General Hospital Emergency Room - Chandler
- Dignity Health AZ General Hospital Emergency Room - Mesa
- Dignity Health Group
- Dillard's 448
- Dimella Shaffer Associates Inc.
- DINEX
- Dining Management Resources, Inc.
- DinnerReview.com
- Diocese of Tucson
- DIOMED
- Diplomat Specialty Pharmacy
- Direct Feedback
- Direct Marketing Concepts
- Direct Selling Association
- Direct Supply Healthcare Equipment
- DirectMail.com
- Director of New Jersey
- Directorate of Maintenance
- Disabled American Veterans
- Disaster Recovery Institute International
- Discover Albany
- Discover Card Corporate Office
- Discover Financial
- Discover Financial Services
- Discover Long Island
- Discover Newport
- Discover Puerto Rico
- Distilled Spirits Council of the United States
- District #1Greenlee County, Arizona
- District #4
- District of Columbia Area Health Education Center
- District of Columbia Primary Care Association
- Distrito 51 Oeste de los Clubes de Leones
- Division For Early Childhood
- Dixie Regional Medical Center
- Dixie State College
- DM Services, Inc.