EFH give margin loans to Directors etc on the shares they own and it is not reportable. So let’s say someone had 200m shares and can’t sell them on market (looks bad if director selling) they take a loan against them, those shares can then be used to trade by EFH and if the owner of the shares pays to get them back they would have to buy them back on market to return them. But if the company is going out the back door then everyone’s a winner. No paying back the loan and no buying back on market. And moving to another exchange would make it all the more hard to trace.