The company must keep shareholders up to date with relevant information and figures on the course of business. The professional management of a share register and the processing of legal contracts also costs either time or money. The shareholder, in turn, must be able to evaluate the information provided on the course of business, particularly in order to make a decision on whether to hold or sell the share position. In the case of private companies, a quick sale is also not possible. Here, the legal contracts must first be agreed, signed and possibly even a buyer found.