Shares are maintained by share persons:

The share persons are the brokers who work in buying and selling of shares by people and companies for brokerage. The commission is the brokerage amount they are given when they are involved in dealing with shares. The brokers will contact the people who have shares in their agency and they will tell the market that time. According to the decisions of the people they either buy or sell shares. Many useful suggestions are also given by the share brokers