After-Hours Buzz: EBAY, CBS & More

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

Ebay - The online auction company posted earnings of 70 cents, excluding one-time items, on revenue of $3.99 billion, edging past expectations for 69 cents a share on sales of $3.98 billion. Meanwhile, the company handed in a weaker-than-expected first-quarter outlook, while full-year guidance was mostly in line with expectations. Shares fluctuated in extended-hours trading.

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CBS - The media company announced a pair of strategic initiatives regarding its CBS Outdoor operating segment, sending shares sharply higher in extended-hours trading.

General Motors - The Treasury has hired Citigroup and JPMorgan to sell the automaker's shares, sources told CNBC. Shares were unchanged in extended-hours trading.

Amgen - The biopharmaceutical company announced that the phase 3 of its Aranesp study failed to meet its primary endpoint, sending shares lower in extended-hours trading. Separately, the company said it plans to build a new manufacturing facility in Singapore for nearly $200 million.

Williams-Sonoma - The kitchenware retailer reported a 4.4 percent gain in holiday comparable brand revenue. Additionally, the company provided fourth-quarter earnings guidance of between $1.21 a share and $1.28 a share and revenue of between $1.36 billion and $1.4 billion versus current Wall Street estimates for $1.20 a share on sales of $1.4 billion. Shares edged lower in extended-hours trading.

Kinder Morgan - The energy company increased its quarterly dividend by 2.8 percent to 37 cents a share from 36 cents a share. Shares edged higher in extended-hours trading.

Thor Industries - The RV manufacturer named Dominic Romeo its new CFO. Romeo was formerly the vice president and CFO of IDEX.

Jefferies lifted its rating on GT Advanced Technologies to "hold" from "underperform" and reduced its rating on Itron and Cree to "hold" from "buy" and to "underperform" from "buy," respectively. Itron and Cree slipped in extended-hours trading.

—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)

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