After-hours buzz: Qualcomm, Gap, & more

Check out which companies are making headlines after the bell Monday:

Qualcomm - The chipmaker agreed to pay $975 million to the Chinese government to settle a 14-month long probe into alleged anticompetitive practices. The stock rose more than 1 percent in extended trading.

Gap - Shares declined about 1 percent after the apparel retailer announced overall same-store sales rose 2 percent in the fourth quarter. - The stock plunged after the discount provider forecast first-quarter revenue of between $52 million and $54 million, well below Wall Street's estimates of $66.3 million. Shares tumbled more than 31 percent in after-hours trading.

Qualys - Shares of the cloud security provider rose more than 3 percent as fourth-quarter revenue grew 26 percent, year-over-year, while adjusted profit increased 30 percent.

Aeropostale - The teen retailer's shares shot up some 23 percent after it narrowed the range of its expected loss for the fourth quarter.

Computer Sciences - The stock fell about 6 percent after the IT provider missed Steet revenue expectations.

United Continental - Shares edged higher after the airline provider reported traffic rose 1.1 percent in January.