- Anglo Irish Bank
- Aon Insurance Managers (Isle of Man) Limited
- Bank of Ireland (I.O.M.) Limited
- Bank of Scotland International
- Barclays Wealth Intermediaries & Corporates
- BlackRock (Isle of Man) Limited
- Bradford & Bingley
- Cains Advocates Limited
- Castletown Insurance Services Limited
- CGI Group
- Deloitte & Touche
- Dickinson Cruickshank
- Dougherty Quinn Ltd
- DSG international Insurance Services Limited
- Ernst & Young
- Horwath Clark Whitehill Audit LLC
- Isle of Man Insurance Management Limited
- KPMG
- LCL Services (IOM) Limited
- Lloyds TSB Offshore
- London & Capital Asset Management Limited
- Marsh Management Services Isle of Man Ltd
- Moore Stephens
- PricewaterhouseCoopers
- Royal Insurance Service Company (IOM) Limited
- Simcocks
- Standard Bank Isle of Man Limited
- The Royal Bank of Scotland International Limited
- Thomas Miller Risk Management (IOM) Limited
- West Insurance Management Limited
- Willis Management (Isle of Man) Limited
