[jhylau]

I believe these types of trusts (without knowledge of the exact trust setup) are to limit the inheritance tax when he dies, by having the trust own the shares at an early stage (lower valuation, lower inheritance tax). It can appreciate within the trust without accumulating additional inheritance tax on the appreciation. The downside is the trust owns the shares and he can't liquidate it for his own use, which he doesn't need to cos he's already rich enough.