NEW YORK (CNN/Money) - Tricon Global Restaurants Inc. logged a 41 percent jump in first-quarter profit, beating Wall Street expectations, the company said Monday, helped by rising sales at outlets open at least a year.

The operator of the Pizza Hut, Taco Bell and KFC food chains said earnings for the latest quarter jumped to $124 million, or 80 cents a share, from $88 million, or 59 cents a share, a year earlier. Analysts polled by earnings tracker First Call expected earnings of 77 cents a share.

The Louisville, Ky.-based company also raised guidance, saying it now expects second-quarter earnings of 83 to 87 cents a share, above Wall Street's 81-cent forecast. It also raised its full-year earnings estimate to $3.63 to $3.70 a share. Analysts are forecasting $3.63 a share, according to First Call.

Tricon (YUM: Research, Estimates), which plans to officially change its name to Yum, its trading symbol on the New York Stock Exchange, said first-quarter sales rose 7 percent, to $1.6 billion from $1.5 billion. The company said sales at restaurants open at least a year, a key retailing gauge known as same-store sales, boosted the bottom line.

Shares of Tricon slipped 33 cents to $61.27 Monday, less than $3 off its 52-week-high of $63.93.