Van der Moolen Holding N.V. is a securities trading firm that principally engages in the trading of equities, equity options, equity index options and bonds on securities exchanges in both the United States and Europe. Operating four business segments: VDM Specialists, United States Option Business, European Trading and Other, which are comprised of 10 principal subsidiaries, the Company functions as a low-cost liquidity provider, providing liquidity in different time zones on exchange floors and electronic trading systems through its role as specialist or proprietary traders. Acting as a counterparty to market professionals such as banks and brokerage firms, the Company performs an average of over 75,000 transactions a day.