A man walks by the New York Stock Exchange in New York City.

Check out the companies making headlines after the bell:

United Airlines shares jumped as much as 6 percent following a strong top and bottom line beat for the airline's fourth-quarter earnings report. United turned in a profit of $2.41 a share for the most recent quarter, better than the $2.04 a share expected by Wall Street. The airline also gave a forecast for first-quarter earnings of $1 a share, topping analyst estimates of 84 cents a share.