How fast is the Islamic finance industry growing? The Banker attempts to answer this question with the launch of a new listing: Top 500 Islamic Financial Institutions. The pioneering role of the listing is to provide a benchmark for the future, which can be improved on for the good of the industry. Better disclosure is expected to flow from the publication of listings such as this as greater competition puts pressure on institutions to increase transparency in this area. Stephen Timewell and Joe DiVanna report.