International Biotechnology Trust plc invests in development-stage and late-stage companies, primarily smaller and mid-capitalization quoted companies, with a minority in larger quoted companies. It makes long-only investments, favoring quoted or unquoted biotechnology and life sciences companies focused on drug discovery and development, as well as related sectors such as microbiology, life sciences, pharmaceutical R&D, gene R&D, medical devices, and healthcare services. The fund also invests in the therapeutic sub-sector, specialty pharmaceuticals, and life science tools. It typically invests in the United States but may also invest in Western Europe, Australia, and Asia, with initial investments between $1 million and $4 million.