- Aon Insurance Managers (Isle of Man) Limited
- Castletown Insurance Services Limited
- CGI Group
- DSG international Insurance Services Limited
- Isle of Man Insurance Management Limited
- LCL Services (IOM) Limited
- Marsh Management Services Isle of Man Ltd
- Royal Insurance Service Company (IOM) Limited
- Thomas Miller Risk Management (IOM) Limited
- West Insurance Management Limited
- Willis Management (Isle of Man) Limited
