Shortselling and loan of shares are becoming a common complement to"traditional"trade in shares. To be able to lend shares, it is necessary to reregister the shares so that the shortseller is competent to sell these shares further. In a legal sense, the proprietorship of the shares has changed hands, though it is not obvious for those involved to see what happens to the prorietorship. The obscurity is principally whether a complete changeover of the proprietorship is made between those concerned. This essay makes clear which legal consequences loan of shares and Shortselling get concerning the proprietorship, and how a conflict between the lender and the third party should be solved if the shortseller becomes bankrupt.