Since Berthold Kempinski and his wife Helena had no male children, they invited their son-in-law Richard Unger to join the business. Unger, who made a considerable contribution to the success and development of the firm, very soon took over its running. Berthold Kempinski finally transferred the firm to his son-in-law on condition that he kept the name Kempinski. Berthold Kempinski died on March 14, 1910.