Shares of Aztar ( AZR) were among the NYSE's winners Monday, surging 23% after the gaming company agreed to be bought by rival Pinnacle Entertainment ( PNK) in a deal valued around $2.1 billion. Pinnacle will pay $38 a share for Aztar, which represents a 24% premium over Friday's closing price of $30.70. The cash portion of the deal is valued around $1.45 billion; Pinnacle also will acquire about $723 million in debt. The combined company will have 12 gaming properties in the U.S., with a strong presence in Nevada, New Jersey, Louisiana, Missouri and Indiana. The deal is expected to close by the end of the year. Aztar shares recently traded at $37.81, up $7.11, while Pinnacle shares rose $2.13, or 8%, to $30.09. Shares of Top Tankers ( TOPT) jumped 13% after the oil tanker company announced the sale of 13 vessels and declared a special dividend of $5 a share. The company sold the vessels for roughly $550 million, with net proceeds of roughly $240 million. The company also signed a leaseback agreement on the 13 vessels for a period of five to seven years. Top Tankers, which plans to use the majority of the proceeds to pay the special $5 dividend, said that it plans to announce a second dividend of $2.50 a share by the end of March, bringing the total amount of its special dividends to $7.50 a share. The $5 dividend will be payable on March 27 to shareholders of record on March 22. Shares were trading up $1.83 to $15.65. Shares of eCollege ( ECLG) fell 8% after the company announced better-than-expected fourth-quarter earnings but warned that first-quarter results would fall below expectations. The company, which provides information services to the education industry, posted earnings of $2 million, or 9 cents a share. Excluding items, the company earned $3.4 million, or 15 cents a share. Analysts polled by Thomson First Call expected earnings of 14 cents a share, before items. ECollege reported revenue of $29.6 million, matching analysts' mean estimate. Last year, the company posted adjusted earnings, which exclude items, of $2.8 million, or 13 cents a share, on revenue of $24.4 million.