The world's largest commercial jets are used as private jets, but it is often difficult to know exactly what assets the mega-rich possess. Details about their wealth are often opaque, and establishing ownership can be complicated by holding assets in self-companies or trusts. These are also reasons why it can be difficult to know what the most expensive private jets are in the world. The list of the largest private jets in the world is constantly changing and is likely incomplete, but here are some of the known giant private jets.