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After-hours buzz: JC Penney, Micron, Sonic & more

Wall Street subway station NYSE
Scott Mlyn | CNBC

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

JC Penney — The department-store operator jumped in after-hours trading after saying it expects fourth-quarter sales would come in at the high end of expectations.

KaloBios Pharmaceuticals — The drug developer fell in after-hours trading after reporting disappointing data from a study of a treatment for lung infections for patients with cystic fibrosis.

Micron Technology — The chipmaker edged higher in after-hours trading after reporting mixed first-quarter results.

Sonic — The restaurant-chain operator rallied in after-hours trading after reporting first-quarter earnings that beat expectations.

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