Abstract Although research confirms that company mission and organizational values may influence the performance of individual employees as well as the company, it is evident that explicitly or implicitly codified statements of company mission and organizational values are simply not enough. Employees should feel the meaning of the mission and values, they should exercise them passionately and positively. It is therefore not only important for companies to define such statements but spread such ideas among the employees. By focusing on literature review and empirical research, the paper illustrates and verifies the significance of written and communicated company missions and organizational values. The study is based on a sample of Slovenian companies. In the study, we confirm positive connections between the existence of company mission and organizational values and their communication within a company on one hand and some of the non-financial aspects of company performance on the other.