Ticketmaster (NASDAQ: TMCS) is the largest ticket distributor in the US. In 2001, they sold more than 86.7 million tickets, valued at more than $3.6 billion. Ticketmaster is majority owned by USA Networks, Inc. (NASDAQ: USAI) and is a part of its Interactive Group. Ticketmaster has the exclusive right to sell tickets to all major venues in the US. They also sell tickets to events in Canada, Australia, Canada, Denmark, Ireland, Mexico, Netherlands, Norway, and the United Kingdom. Tickets sold through Ticketmaster are subject to various fees and taxes. These may add up to 20-30% of the face price of the ticket. These don't include special shipping options, which may be another $15-25. TMCS also owns Match.com, Citysearch, Evite, ReserveAmerica, PacerCats, Admission.com, Synchro.com, and Ticketweb.

Most of this info from aboutticketmaster.com