- Cache School District
- CAE USA
- Cain Brothers
- CAL - CAL Energy Commission
- Cal Inc.
- Calais Regional Hospital
- Calamos Asset Management, Inc.
- Caldwell UNC Health Care
- Calgon Carbon Corp.
- Calhoun County Commission
- California Almond Growers Exchange, dba Blue Diamond
- California Area Health Education Center AHEC)
- California Association of Career and Technology Education
- California Association of Homes and Services for the Aging
- California Association of Marriage and Family
- California Association of Realtors
- California Clinical Trials
- California Conference of Masons Contractors Association
- California Environmental Protection Agency
- California Examiner - San Diego
- California First National Bank
- California Highway Patrol
- California Hospital Association
- California Hospital Medical Center
- California Independent System Operator Corp.
- California Joint Powers Insurance Authorit
- California Lodging Industry Association
- California Optometric Association
- California Pacific Medical Center
- California Pacific Medical Center Van Ness Campus
- California Society of Certified Public Accountants
- California Society of Professional Engineers
- California State University
- California State University - Fresno
- California State University - Stanislaus
- California State University-Sacramento
- California Transplant Donor Network
- California Travel Industry Association
- Call Federal Credit Union
- Callaway County United Way
- Callaway District Hospital
- Callery Consulting LLC
- Callister, Nebeker and McCullough
- Calmoseptine, Inc.
- Caltronics Business Systems
- Calvary Baptist Church
- Calvert County Dept. of Economics Development
- CalvertHealth Medical Center
- Calvin College
- Calvin Community