Check out the companies making headlines after the bell:
Shares of Red Hat surged nearly 5 percent after hours after the open-source software company reported its fourth-quarter earnings. The company reported earnings per share and revenue that beat Wall Street expectations. Sales rose 23 percent year over year to $772 million in the fourth quarter.
AnaptysBio shares rallied over 12 percent post-market. The drug developer announced positive peanut allergy treatment data on Monday afternoon. Analysis of the mid-stage trial data pointed to nearly half of patients treated showing peanut tolerance.
Following AnapstysBio's good news, shares of Aimmune Therapeutics fell nearly 2 percent. Aimmune's drug to treat peanut allergy in children succeeded in a late-stage study in February.
SM Energy stock gained over 2 percent in extended trading. The natural gas exploration company announced that it completed a previously announced sale of the majority of its assets in the Powder River Basin for $500 million. The company plans to use the proceeds for general corporate purposes, including debt reduction.