The Access-backed firm, which promotes itself as the world's largest internet incubator, is set to float in Frankfurt later in 2014.

Rocket Internet, the Germany-based internet investor backed by investors including industrial group Access Industries, is looking to go public at a valuation of over €3bn ($4.1bn), Bloombeg has reported, citing two people familiar with the situation.

Founded by the Samwer brothers in 2007, Rocket Internet operates in the space between an incubator and a venture capital fund, and although it is based in Berlin, its offices span 25 countries.

Rocket is most famous for taking online business models pioneered elsewhere…