IRESS Limited is an Australian software company specialising in the development of software systems and services for financial markets and wealth management. The company provides services to stockbrokers, financial institutions and research analysts. IRESS has its corporate office situated in Melbourne, with overseas offices located in South Africa, New Zealand, Canada, Hong Kong, Singapore and the United Kingdom. It is listed on the Australian Securities Exchange, and is a member of the S&P/ASX 200 index. The ASX is a major shareholder of IRESS, owning 18.8%.