Hey Suz,
Universal Stock is traded under Vivendi Universal. I think Sony has some play with this as well. The ticker symbol is just V. It is traded in the New York Stock Exchange (NYSE). Keep in mind, Universal Studios Theme Parks is just one line of business done by Vivendi Universal. They have other businesses they run under this one symbol. I would suggest you research the company in detail before buying into the stock. Although, the way Universal Theme Parks are growing it might be a great buy.
Hope this help!!
ADP