We see countless cases of human rights violations committed by corporations every day. Human rights violations range from modern slavery up to complicity in war crimes. States should prevent such violations, but in many cases they are unable or unwilling. Large corporations have inexhaustible resources. As a result, domestic regulations, and the enforcement of existing norms, have proven to be flawed and largely inexecutable.In the context of new power structures throughout a globalising world the question is raised if multi-national corporations are beyond the reach of the law?This thesis submits that multinational companies can be held responsible for their human rights violations, based on existing international law.First the legal personality of multinational companies in international law demonstrating the continuing on-going shift of a paradigm is addressed, expanding the doctrine of states as sole subjects of international law to a multi-stakeholder approach. The next step gives a general overview of these different sources of law and the existing norms, further dividing in norms existing on the international level and the regional European level. The following Chapter deals with issues of the complex relations between parent and subsidiary companies, mainly, the problem of establishing jurisdiction due to the widespread global connections of multinational companies. Moreover, controversial judicial subjects are analysed; it shows the current state of discussion and evolving international standards in fields like the impact of the assessment of the sphere of influence or about due diligence standards and procedures.The last Chapter discusses briefly the hypothesis and the facts put forward, concluding, that indeed the legal basis for holding corporate legal persons liable is already existing.