In this study, we examine the internationalization processes and reverse knowledge transfer of Turkish multinational companies. Case study was used with the aim of revealing exploratory knowledge because there is no enough study in the related literature. In-depth interviews were conducted with senior executives of a Turkish multinational company. This company has subsidiaries operating in developed and developing host countries. When the findings are evaluated, it is seen that reverse knowledge transfer takes place not only from developed host countries but also from other developing host countries. It turns out that reverse knowledge transfer helps to improve processes in the head firm and between branches by providing benefits in terms of time and cost. In addition to reverse knowledge transfer, they widely use formal and informal channels of effective information transfer, both from the head office to the branches and between the branches. In addition, when the findings are evaluated in general, it is seen that a single internationalization theory will not be sufficient to explain the internationalization processes of Turkish multinational companies and it would be more accurate to consider multiple theories together.