• WHSmith
• WIDA - Waterford Intellectual Disability Association
• WSP Global Inc
• Wallace Myers International
• Walsh Waste
• Ward Personnel Ltd
• Wayflyer
• Webrecruit
• Wellington Professional Recruitment
• West Wood Club - West Wood Club limited
• Westbourne IT Global Services
• Westcare Homecare Ltd.
• Western Care Association
• Western Union
• Westgrove Hotel
• Wexford Car Centre
• Wgnstar
• Wheelchair Cars Ireland
• White Sands Hotel
• Windmill Healthcare
• Winthrop Technologies
• Wisetek
• WuXi Biologics Ltd.