0% The original idea will inevitably morph into a completely different thing. Edit: If you must give something ( because it strikes your fancy) , then ensure

0% The original idea will inevitably morph into a completely different thing. Edit: If you must give something ( because it strikes your fancy) , then ensure they are non-voting shares and that he cannot prevent any ( and I mean any) amendments to the by-laws, shareholders agreement or the articles of incorporation. ( to the full extent of your laws)