The public investment GmbH & Co KG is a mixed typ of company, which is widespread in Austria and in Germany. This special typ of comany is a development of the economical praxis, which first of all showed advantage because of tax advantages. Objective of a public investment company is to increase the value of the investors capital.Despite all concerns the GmbH & Co KG is a accepted and gladly used typ of company. Above all the flexibility of the individual company law brings a lot of benefits in the creation of the company with it. Because the rules of the individual company law are fragmentary and rudimental, the contract of a GmbH & Co KG is essential.Frequently to meet in practice is a fiduciary, who will be embedded in the company law relationship. Ostensibly this is made for simplification, because the KG will then only have have to share one legal relationship with the trustee and not with all investors.The organisation of a public investment company features some important specifications, like ?mittelbare Fremdorganschaft?. Many times also a ?Beirat? can be found.Because the public investment company searches for investors at capital markets, the rules of the KMG are applicable. For this reason involved is the question about prospectliability.Because investors join a company and do not buy a obligational investment, the question arises how investorprotection plays a role in the system of individual company law.