The celares GmbH is recognized as the leader in PEGylation services including process development, analytical characterization of PEG conjugates and manufacturing of activated PEGs for almost two decades. Recently, we extended our core competences to ?bioconjugation? and to ?polymers for drug delivery? in a more general sense, while maintaining PEGs and PEGylation as part of our extended services. Most recently, we were inspected by the local authorities and received GMP certificates for the release analytics of drug substances and for the manufacturing of conjugate vaccines. In addition, we have developed novel multimerization technologies that will benefit the developments of our customers and we offer these technologies in reasonable license agreements.