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After-hours buzz: Nike, Micron Technology, Baxalta & more

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Check out the companies making headlines after the bell Tuesday:

Nike stock popped after beating earnings expectations. The athletics giant is the best performing stock on the Dow Jones industrial average. During the holiday season, Nike has been benefiting from the athleisure trend as well as a lifetime deal with LeBron James.

Celegene shares rose about 7 percent after the bell when the company said it would allow for the sale of a generic version of its flagship multiple myeloma drug, Revlimid, in the United States over a year before patents covering the drug expire. The deal was part of a patent litigation settlement.

Micron Technology also posted earnings on Tuesday, beating Wall Street's expectations on the bottom line. Shares of the memory chip maker slumped in extended hours trading.

Foot Locker shares climbed higher after the bell. The rise coincided with rival retailer Nike's second-quarter earnings announcement.

Shares of Under Armour also saw similar movement after hours. The Wall Street Journal reported that the fitness company appointed new CFO Chip Molloy on Tuesday.

Baxalta stock inched upward in after-hours trading. This comes on the heels of a report that drugmaker Shire made a new acquisition offer to buy the biopharmaceutical company.

— Reuters and The Wall Street Journal contributed to this report.