Traders work the floor of the Dow Jones at the closing bell of the New York Stock Exchange.

Check out which companies are making headlines before the bell:

United Continental — Shares of the airline, which is caught up in a public relations nightmare, are trading slightly higher Wednesday morning, recovering losses of as much as 4 percent on Tuesday. Chief Executive Oscar Munoz appeared on ABC's "Good Morning America" Wednesday morning, issuing a more formal apology and promising "this will never happen again."