Maharashtra has an above average knowledge industry in India with the Pune Metropolitan area being the leading IT hub in the state. Approximately 25% of the top 500 companies in the IT sector are situated in Maharashtra. The state accounts for 28% of the software exports of India. The state houses important financial institutions such as the Reserve Bank of India, the Bombay Stock Exchange, the National Stock Exchange of India, the SEBI and the corporate headquarters of numerous Indian companies and multinational corporations. It is also home to some of India's premier scientific and nuclear institutes like BARC, NPCL, IREL, TIFR, AERB, AECI, and the Department of Atomic Energy.