Doertenbach & Co. GmbH is a German investment banking and financial advisory firm. The Firm specializes in mergers and acquisitions, corporate finance, debt and equity placements, valuations and fairness opinions, and strategic advisory services. The Firm's clients include companies from the automotive, chemicals, consumer products/services, life science, machinery, media, and retail sectors. Doertenbach & Co. GmbH was established in 1989 and is based in Frankfurt.