What is reiner schmidt-ruthenbeck?

As an AI language model, I don't have access to a complete and accurate information database about all people in the world, but from what I know, Reiner Schmidt-Ruthenbeck is a German entrepreneur who became known as one of the investors on the TV show "Die Höhle der Löwen" (German version of Shark Tank). He has a background in marketing and has worked for several international firms such as L'Oréal, Procter & Gamble, and Unilever. He is also the founder of his own marketing agency and has invested in various startups throughout his career.