Check out the companies making headlines after the bell Wednesday:
Five Below: The discount retailer reported adjusted first-quarter earnings of 8 cents a share, beating estimates by a penny, while revenue came in at $154 million, topping forecasts of $151 million. The company also gave strong second-quarter and full-year revenue guidance, sending shares about 7 percent higher after-hours.
FireEye: The security solutions provider announced a new partnership with Visa in a joint venture that it says will help merchants and banks "quickly detect and respond to attacks against their IT and payment infrastructure." FireEye shares rose about 2 percent on the news, but Visa shares barely budged.
Bluebird Bio: The biotech firm announced that its existing collaboration agreement with Celgene had been amended and restated. The company's shares fell more than 2 percent in extended trading, while Celgene shares were unchanged.
Verint Systems: The intelligence solutions provider reported first-quarter earnings of 66 cents a share on $269.5 million in revenue. The stock fell more than 3 percent in after-hours trading.