Serono International SA is one of the world's largest biotechnology companies with sales in 2004 of almost US$2.5bn made in over 90 countries. The company presently has eight biotechnology products and operates in four market areas: neurology, reproductive health, growth and metabolism, and dermatology. Serono's shares are traded on the Swiss Exchange as well as the virt-x exchange and its American depositary receipts (ADRs) are traded on the New York Stock Exchange. Its results were released on 1st February, 2005. The company has its headquarters in Geneva.