Many commercial companies that give out stocks must have a share register somewhere. Here one should be able to find the people who have shares of the company. This is a vulnerable item in terms of personal data protection. Who should have access to this register? Who should know who has shares in what? Should the general public know what shares the prime minister buys from his salary that is granted by tax payers from their money? I haven't seen any discussion about this, but I think it's only a matter of time.