Check out the companies making headlines after the bell Monday:

Traders work on the floor of the New York Stock Exchange on March 18, 2015, in New York City.

IBM - The chip maker beat first-quarter earnings expectations, but revenue trailed as the company hardware business declined 23 percent from a year ago, while software sales fell 8 percent. Total revenue tumbled 12 percent from a year ago, marking IBM's 12th straight quarter of year-over-year declines. The stock rose about 2 percent before turning lower.