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3/17/15: Botox-manufacturer Allergan Inc. (NYSE: AGN), which is in the process of being acquired by pharmaceutical giant Actavis Plc. (NYSE: ACT), is being replaced on the S&P 500 index by American Airlines (NYSE: AAL). The addition of AAL will take place after the close of trading on March 20.
Actavis Plc. (NYSE: ACT) agreed to acquire Allergan on Nov. 17, 2014, for $66 billion in the year's biggest anticipated pharmaceutical deal. AGN shares gained 89.71% for the year, ending at $212.59. The market value of Allergan is currently $71.26 billion.