You are not born to be a leader but can develop into one. A number ofdevelopmental theories describe the way adults can develop towards morecomplex and differentiated ways of under-standing themselves and the world,measured e.g. by a research-based test, the Washington University SentenceCompletion Test (WUSC).A case study of a highly competitive bank in Sweden with a humanistic corporateculture was conducted through a multimethod study including the WUSC test. Theaim was to investigate in which ways this kind of culture, where learning isconsidered as a part of everyday work and employees actively participate in thebusiness planning process, is related to development.Results show that the vast majority of employees (including managers) represent aspecific developmental level where people still are task- rather than goaloriented.The developmental level of managers were important for how theirleadership was thought of by employees and for how successful they were ininvolving employees in the business planning process. Thus developmentalaspects seem to be important for maintaining and further developing a culturethat supports learning.