The present dissertation analyses possible implications arising from the fundamental right of the protection of
personal data within corporations in their every day business. A focus is laid on the mergers and acquisition
business, as the accquisition of corporations (as well as shares in those corporations) meanwhile means a common
transaction in todays business life. Due to this procedures, legal restructurings of the concerned corporations are
almost unavoidable. These restructurings regulary also cause the use of a big amount of personal data. For the
potential purchaser especially important information is usually unfolded in due diligences, thereby it is often a
comprehensive providing with personal data, which in the end can be crucial for the success or fallure of an
accquisition. Analysing the legal circumstances of the use of this personal data is one of the main subjects of the
dissertation, a detailed examination is given on the question, whether the universal succession in civil law also
results a data protection fact. Furthermore specific questions in corporate concern structures are examined, as well
as an overlook about the category groups IT-security, employer-employee relationship and e-commerce under a
data protection point of view is given. The analysis ceases in an exursus concerning data protection in the field of
public sector information.