After-hours buzz: Amazon, Starbucks, Zynga & More

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

Amazon.com - The online retailer reported a loss of 2 cents a share on sales of $15.7 billion, missing expectations for earnings of 5 cents a share on sales of $15.73 billion. Shares declined in extended-hours trading.

(Read more: Stocks squeeze out gains in choppy session; FB skyrockets 30%)

Starbucks - The coffeehouse giant posted earnings of 55 cents a share on revenue of $3.74 billion, edging past expectations for 53 cents a share on sales of $3.72 billion. In addition, the company handed in full-year guidance that topped current estimates, sending shares higher in extended-hours trading.

Zynga - The social video game maker posted a loss of a penny a share on sales of $188 million, topping expectations for a loss of 4 cents a share on revenue of $183 million. But the company handed in current-quarter guidance that widely missed forecasts. In addition, the company said it has decided not to pursue a license for real money gambling in the U.S. Shares dropped in extended-hours trading.

Gilead Sciences - The biotechnology company posted earnings of 50 cents a share, excluding one-time items, matching Wall Street expectations, on sales of $2.77 billion, topping forecasts for $2.66 billion. Shares advanced in extended-hours trading.

Expedia - The travel website posted earnings of 64 cents a share, excluding one-time items, on revenue of $1.21 billion, disappointing analysts who had expected 79 cents a share on sales of $1.26 billion. Shares plunged sharply in extended-hours trading. Shares of rivals Priceline and Orbitz also dipped in extended-hours trading following the announcement.

Tempur Sealy - The mattress manufacturer reported earnings of 36 cents a share, excluding one-time items, on revenue of $661 million, missing expectations for 40 cents a share on sales of $663 million. In addition, the company cut its full-year outlook, sending shares sharply lower in extended-hours trading.

KLA-Tencor - The semiconductor-equipment manufacturer posted quarterly results that beat expectations, but handed in current-quarter guidance that disappointed Wall Street analysts. Shares tumbled in extended-hours trading.

CBS - The broadcasting company raised its share buyback program to $6 billion, an increase of $5.1 billion. Shares climbed in extended-hours trading.

Newmont Mining - The mining company cut its dividend to 25 cents a share from 35 cents a share, due to the decline in gold prices. Still, shares rose in extended-hours trading.

Cliffs Natural Resource – The coal mining company posted earnings of 82 cents a share on sales of $1.49 billion, exceeding Wall Street projections for 58 cents a share on revenue of $1.41 billion. Shares rallied in extended-hours trading.

SolarWinds – The tech company posted earnings of 40 cents a share, excluding one-time items, on sales of 78 million, versus projections for 36 cents a share on revenue of $79 million. But the company handed in current-quarter and full-year outlook that missed estimates, sending shares sharply lower in extended-hours trading.

HealthSouth – The inpatient rehabilitative hospital operator posted earnings of 51 cents a share on sales of $565 million, easily topping expectations for 41 cents a share on revenue of $554 billion. In addition, the company initiated a quarterly dividend of 18 cents a share. Shares were largely unchanged in extended-hours trading.

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

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