Complex Biosystems GmbH is an emerging venture capital-backed biotechnology company based in Heidelberg, Germany. Complex owns a suite of drug delivery platform technologies for peptide and protein therapeutics and for selected natural products and small molecules. Complex is active in the area of metabolic diseases and offers access to its transient PEGylation (TransPEG) technology through research partnerships and technology licensing.

Company was acquired by Ascendis Pharma A/S