The enterprises of major families generally concentrate their shares on one person in order to maintain their status.
Take the Chu Corporation, for example. Suppose the Chu Corporation's future stocks are divided into three parts and distributed equally among three children. In that case, the Chu Corporation will be divided and the stocks will be dispersed once the three children start their own families.
In such a scenario, none of the three children will have significant influence within the company.
Moreover, if the three children have their own children in the future, further division will occur. If someone is determined enough to collect scattered stocks exceeding the Chu family's holdings, the Chu Corporation will essentially change its surname.
Therefore, in most large families, they choose one person as the heir while the remaining children only have some dividend rights.