Nauti Expert is the maritime insurance division of Groupe Lanthier Assurance, established in St-Lambert since 1955. The Nauti Expert program is a new initiative aimed at offering the best products and services in Quebec.
Partnering with Groupe Lanthier Assurance is a privilege as we operate under strict guidelines that enable us to implement best practices.
We work with the leading insurers in the market, including Aviva, Chubb, APRIL Marine, Intact Insurance and Pacific Marine, to offer our clients comprehensive coverage tailored to their vessel and the way they navigate.
Thanks to our special brokerage licence issued by the Autorité des marchés financiers (AMF), we also have access to premier international markets, including Lloyd’s of London underwriters and several other globally recognized partners. This expertise allows us to find solutions for the most complex marine risks when the local market has none to offer. Sail or power, your boat will be in good hands with our team of experts.
Boat insurance is about more than just the premium. Coverage, exclusions, limitations, navigation options and claims settlement terms can vary considerably from one insurer to another. That’s why we take the time to advise you and answer your questions so you can make an informed choice. Request a quote and discover the Nauti Expert difference: marine experts serving boaters.
Our team specializes in boat insurance. Whether you own a yacht, catamaran, cruiser, pontoon, fishing boat, or other vessels, we offer products from multiple specialized maritime insurers, providing high-quality coverage.
Our passion for boating drives us to go above and beyond, caring for your boat insurance as if it were our own.
With over 30 years of experience in marine insurance, Guillaume Larosée, President, built his expertise by working with some of the top underwriters and boat insurance brokers in Quebec. After a two-year professional break, he relaunched in 2018, with great passion, a dedicated division within Groupe Lanthier Assurances, which he successfully developed over seven years alongside Marie-Soleil Phermigion.
In 2026, the merger of Groupe Lanthier with Groupe DPA Assurances marked a significant turning point and led to the creation of Nauti Expert Inc. Alongside his key employee, now partner, Marie-Soleil Phermigion also became Vice President. Nauti Expert Inc. is an exclusive boat insurance brokerage and is also one of the few firms in Quebec able to insure boats internationally; the firm also holds a special brokerage license.
Groupe DPA also joined the ownership structure, further strengthening this strategic alliance. This collaboration now allows us to offer our clients a complete and integrated service, meeting all their insurance needs with expertise, proximity, and a forward-looking vision.
