Two high-profile floats next week will see digital group Scout24 and Bayer's plastics unit Covestro join the ranks of German companies going public that have already propelled activity in 2015 to an eight-year high.

Private equity-backed Scout24, which is in the bookbuilding phase of its initial public offering, will begin trading on the Frankfurt Stock Exchange on October 1, the same day that Covestro expects to finish taking subscriptions for its own IPO and the day before it hopes to list, according to statements from the firms.