Take a look at some of Tuesday's after-hours buzz:
American Express gained more than 1 percent in after-hours trade after the firm announced it will repurchase up to 150 million common shares and increase dividends by 12 percent.
Vertex Pharmaceuticals surged more than 8 percent in extended-hours trade, opening at 4:45 p.m after being halted in the morning. A Food and Drug Administration advisors recommended approval for the firm's "Orkambi" drug that treats cystic fibrosis, a deadly hereditary disease.
GoDaddy fell more than 2 percent in after-hours trade despite reporting a 17.5 percent revenue increase from added consumers. The website hosting service said net losses narrowed to $43.4 million from $51.3 million in the year-ago period.
McKesson gained 1.5 percent in extended-hours trade after reporting earnings for fiscal 2015 year that showed a 30 percent increase from the same period last year. The health care information technology firm also raised its earnings outlook and the board approved a new $500 million share repurchase program.
Zillow jumped as much as 5 percent after reopening in extended-hours trade on reporting earnings of 5 cents a share, beating estimates of an 11 cent loss. The online real estate listings site reaffirmed full-year revenue guidance above Street expectations.
Vivint Solar plunged more than 7.5 percent in after-hours trade after the provider of home solar panel services reported first quarter earnings that showed a 63 percent loss from operations, year-over-year.
AES fell 3 percent in extended-hours trade on the announcement of a secondary offering of 60 million shares in common stock. The international electricity generator and distributor also said it will repurchase 20 million shares of common stock.