Check out which companies are making headlines after the bell Wednesday:
Apple - The iPhone maker continued to edged lower in extended-hours trading. The stock plunged more than 6 percent in the regular session, logging its worst one-day decline since 2008, following news that the tech giant's margin requirements were being raised to 60 percent from 30 percent by COR Clearing.
- The semiconductor company narrowed its fourth-quarter revenue guidance to between $2 billion and $2.1 billion, mostly in line with estimates, and raised its gross margin outlook. Shares gained in extended-hours trading.
Deutsche Bank - The bank failed to recognize up to $12 billion in paper losses during the financial crisis, according to the Financial Times, citing three former employees. Shares slumped in extended-hours trading.
Stryker - The medical-equipment maker raised its quarterly dividend by 25 percent to 26.5 cents a share and authorized an additional $405 million stock buyback plan. Shares edged higher in extended-hours trading.
Citrix Systems - The software company signed a definitive agreement to buy mobile device management company, Zenprise. While financial terms were not disclosed, Citirix expects the acquisition to close during the first quarter of next year.
Dick's Sporting Goods - The sports equipment retailer declared a special dividend of $2 a share and announced that CFO Tim Kullman will retire in 2013. Kullman will continue in his current role until a successor is named. Shares climbed in extended-hours trading.
Crocs - The specialty shoe manufacturer was initiated with an "outperform" rating at Imperial Capital with a price target of $16.
Men's Wearhouse - The men's clothing retailer posted earnings of 95 cents a share on revenue of $631 million, missing estimates for a profit of 97 cents cents a share on sales of $636 million. The company also cut its current-quarter earnings expectations, sending shares lower in extended-hours trading.
Finisar - The maker of networking and communications devices posted earnings of 15 cents a share, excluding one-time items, topping estimates by a penny a share, while revenue was in line with expectations. In addition, the company handed in current-quarter guidance that were mostly in line with forecasts, sending shares higher in extended-hours trading.
Ascena Retail - The parent company of Dress Barn and Lane Bryant reported earnings of 39 cents a share, ex-items, topping estimates for 34 cents a share, while revenue matched forecasts. The company added that sales rose 4 percent in its fiscal first quarter. Shares rallied in extended-hours trading.
(Read More: CNBC's Market Insider Blog)
—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)
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