Today, when the individual mindset has increased, the employees in the institutions have begun to be evaluated with abstract variables such as personality traits rather than concrete objects. After determining the personality traits, the dark triad, which has recently been found in the literature, contains the personality traits of machiavellianism, psychopathy and narcissism. These personality traits are generally; self-interested behaviors are expressed as lack of emotion and empathy, manipulative behavior and egocentrism. In addition, individuals with dark triad personality traits do not care about the feelings and thoughts of the people around them and may engage in behaviors such as escaping information unless they are in their own interests. The behavior of whistleblowing, which is generally a concept that has negative connotations and is misunderstood, is briefly in the form of informing the solutionoriented units, considering the benefit of the institutions or the society, by the employees who notice an ethical or illegal situation. The whistleblowing behavior has been studied in the literature mostly with ethical issues and different personality traits. However, it has been observed that not all of the dark triad, which has many positive and negative aspects, are handled with whistleblowing behavior. In this study, the dark triad and whistleblowing were discussed in terms of employees and managers in corporate life, and the concepts they were affected by and influenced were examined.