- West-MEC Western Marisopa Education Center
- Westar Energy
- WESTAT
- Westchester County Clerk
- Westchester County Department of Senior Programs and Services
- Westchester County Tourism
- Westchester Medical Center
- Westcoast Hotels
- Westcon Group
- Westel Inc.
- Western Arizona Regional Medical Center
- Western Branch High School
- Western Carolina Medical Society
- Western Carolina University
- Western Dairyland Community Action Agency
- Western Gas Resources
- Western Health Advantage
- Western Highlands Network
- Western Illinois University
- Western Kentucky University School of Nursing and Allied Health
- Western Michigan University
- Western Michigan University, College of Health and Human Services
- Western North Carolina Baptist Retirement Home
- Western North Carolina Regional Air Quality Agency
- Western Ohio Education Association
- Western Pacific Renal Network, LLC
- Western Piedmont Community College
- Western Society of Periodontology
- Western Wats Center
- Westfield Memorial Hospital
- Westfields Hospital
- Westfields Marriott Washington Dulles
- Westgate Resorts Foundation
- Westin Atlanta Airport
- Westin Bonaventure Hotel and Suites
- Westin Convention Center
- Westinghouse Electric Company
- Westminster at LakeRidge
- Westminster Canterbury Richmond
- Westminster Christian Academy
- Westminster College
- Westminster Communities of Florida
- Westminster Towers
- Westminster Village
- Westminster Village
- Westminster Village at Allentown
- Westminster Winter Park
- Westmoreland Federal Savings and Loan Association
- Weston Solutions
- Westover Consultants Inc.