You insurer may not ask, but they will ask for the name of the TITLE HOLDER of the vessel and if that says "XYZ Corp" the gig is up. Not to mention, if you fail to disclose material facts (i.e. the vessel is a personal pleasure craft versus a business asset supposedly used for business purposes) the insurer can step aside and say you defrauded them, you've got no coverage.
If the corporation has no bona fide business purpose, and the boat is not used as part of the business, in the US it can be declared a sham corporation and actions taken against whoever really owns it for whatever purposes. Having the business own it on paper, and having the boat be an actual working business asset, are two very different things. The folks who have been called out over this will tell you it is a very painful experience.
So unless the corporation is chartering out the boat, or using it to test new technologies, or as a showroom, etcetera...all you'll accomplish is paying the steeper commercial
rates for your insurance.