National Holdings Corporation, through its subsidiaries, provides financial services in the United States. It operates through two segments, Brokerage and Advisory Services, and Tax and Accounting Services. The company offers retail brokerage services include execution of purchases and sale of stocks, options, bonds, mutual funds, annuities, and various other securities; and investment advisory services for individual, corporate, and institutional clients. It also provides investment banking services, such as underwriting the sale of securities to the public in initial and follow-on offering, and arranging for the private placement of securities with investors; and financial and corporate advisory services comprising mergers and acquisitions, project financing, capital structure, and specific financing opportunities to micro, small, and mid-cap high growth companies. In addition, the company trades in securities, including making markets in micro and small-cap stocks listed on various exchanges. Further, it provides asset management advisory services to retail clients; fixed insurance products, including life insurance, disability insurance, long-term care insurance, and fixed annuities; and tax preparation services to individuals, primarily in the middle and upper income tax brackets, as well as accounting services to small and midsize companies. Additionally, the company offers licensed mortgage brokerage services; and investment products and services, which comprise stocks, bonds, mutual funds, annuities, insurance, and managed money accounts. The company was formerly known as Olympic Cascade Financial Corporation and changed its name to National Holdings Corporation in March 2006. The company was founded in 1947 and is headquartered in New York, New York.