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After-hours buzz: Fitbit, Spirit Airlines, Sonic & more

Trader on the floor of the New York Stock Exchange.
Brendan McDermid | Reuters
Trader on the floor of the New York Stock Exchange.

Check out the companies making headlines after the bell Tuesday:

Fitbit stock dipped in after-hours trading on Tuesday. Earlier in the day, the fitness wearables manufacturer unveiled its new $200 Apple Watch-like model, Blaze, at the Consumer Electronics Show in Las Vegas. At the market's close, Fitbit shares were already down more than 18 percent.

Shares of Spirit Airlines edged up in extended-hours trading. The discount airline's stock jumped in the regular session after the company named a new CEO on Tuesday. Robert Fornaro, who formerly headed AirTran before its merger with Southwest, will now take over for Ben Baldanza as Spirit's CEO. The leadership shuffle comes as competing airlines decided to raise ticket prices a bit.

Pioneer Natural Resources shares dropped sharply after the bell on Tuesday. Earlier in the day, the company announced that it would begin publicly offering 10.5 million shares of its common stock. Bank of America, Citigroup, Credit Suisse and JPMorgan are overseeing the offering. Oil prices were also down on Tuesday, nearing 11-year lows.

Shares of Sirius XM Holdings increased slightly after the satellite radio company announced that it exceeded its 2015 subscriber forecast. Sirius XM ended the year with about 2.3 million net subscriber additions, surpassing the company's increased guidance of 2 million net subscriber additions. It's expecting 1.4 million in net additions in 2016.

Sonic stock fell after the bell, even though the fast-food chain met Wall Street's expectations in its earnings announcement. Sonic shares hit $31.43 at the market's close, a climb of 16 percent over the last 12 months.

— Reuters and the Associated Press contributed to this report.