The importance of leadership is in following, because without following there is no leading. Leadership is focused on interaction between people, people-oriented. It deals with overcoming changes and does not care about the position an individual occupies in the organization. The functions of leadership are setting direction, involving people, motivating and inspiring. The leader must set realistic frameworks that are the basis for creating their shared vision, in order to instill faith in his vision in employees. It achieves this by "supporting positive energy and joint contribution in the creation and implementation of joint plans". A democratic leader has a two-way relationship with his employees, therefore, he directs and leads, but at the same time listens and learns. Leadership style is manifested in the way in which the leader stimulates employees to perform tasks. Of course, leadership style is determined not only by the characteristics of the leader, but also by the characteristics of subordinates and the specific situation. Successful operations and creation of client satisfaction leads to significant results in the banking sector and the achievement of organizational goals. This paper shows successful management in the banking sector using the example of PBZ. The factors that lead the PBZ group to the very top of Croatian banking are listed and described in detail. They measure their success not only by business results, but by social responsibility and contribution to sustainable development.