The Max Planck Fellow Programme promotes cooperation between outstanding university professors and Max Planck Society researchers. The appointment of university professors as Max Planck Fellows is limited to a five-year period and also entails the supervision of a small working group at a Max Planck institute. Institutes have been able to apply for an extension to the funding period for Max Planck Fellows on a one-off basis since 2009. The option of a one-off extension also exists here.