There are no securities exchanges in Nevada. Approximately 553 brokers and dealers organizations perform securities transactions in Nevada, involving over 1,000 employees. Additionally, 47 organizations are registered to vend advice regarding investment in securities. The state headquarters 38 NASDAQ-listed companies, and has incorporated nine NYSE-listed companies; the top five in terms of revenues being: Harrah's Entertainment, Mandalay Resort Group, MGM Grand, Sierra Health Services, and Boyd Gaming Corp.