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Isle of Man

We have been operating under the same ownership since 1987, although we can trace our origins back even further. We provide a range of services to clients, including private individuals and public companies listed on international stock exchanges.  We act for investment funds, fund administrators, insurance companies, fiduciary service providers, property companies, retailers, farms and local trading companies. All of our staff have a detailed knowledge of the Isle of Man economy and the regulations our clients face.

“We are a long-established local firm and have a complement of highly qualified and efficient staff who are specialists in their fields and have extensive knowledge of the issues facing all manner of businesses operating on the Isle of Man.”

Dennis McGurgan, Managing partner

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Global strength

Grant Thornton is one of the world’s leading organisations of independent assurance, tax and advisory firms. With more than 73,000 Grant Thornton people, across 149 markets, we are focused on making a difference to clients, colleagues and the communities in which we live and work.

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Why Grant Thornton

The firm has a wide range of clients, from captive insurance companies, insurance managers and mutual funds, to local corporations. The services we provide reflect this diversity: in addition to a full range of auditing and accounting functions, the firm also offers specialised services required to conduct business in a low tax jurisdiction.


Grant Thornton is an award-winning globally recognised professional services network. Here are some of our awards:

Universum Most Attractive Employers 2020
Universum Most Attractive Employers 2020
Universum Top 50 Employer for Diversity & Inclusion 2019
Universum Top 50 Employer for Diversity & Inclusion 2019