Check out which companies are making headlines after the bell Wednesday:
Zumiez - The specialty retailer lowered its fourth-quarter outlook, with shares dropping in after-hours trading.
Bed Bath & Beyond - The retailer's shares dropped sharply after it lowered fourth-quarter guidance below Wall Street's expectations.
T-Mobile US - The wireless carrier said it added 1.645 million net quarters in the fourth quarter, up from 1.023 million the prior quarter. Shares edged higher in after-hours trade.
—By CNBC's Kate Gibson.
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