Check out which companies are making headlines after the bell Tuesday:
Facebook - The social-networking giant posted earnings of 12 cents a share, excluding one-time items, on sales of $1.26 billion, edging past estimates for 11 cents a share on sales of $1.23 billion. Shares jumped more than 7 percent after in extended-hours trading. (Click here for after-hours quote)
(Read More: Stocks End Sharply Lower; Apple Falls 3%)
Meanwhile, shares of Zynga jumped in extended-hours trading. The provider of social game services is scheduled to post earnings Wednesday after the close. (Click here for after-hours quote)
Netflix - The online movie-streaming website posted earnings of 13 cents a share. The company posted revenue of $905 million, in line with expectations. Shares plunged in extended-hours trading. (Click here for after-hours quote)
SiriusXM - The radio company announced that CEO Mel Karmazin will be leaving the company at the beginning of February, following the expiration of his contract. Karmizan will also leave the board. Shares tumbled in extended-hours trading. (Click here for after-hours quote)
Dow Chemical - he chemical company announced a restructuring program that will result in a net reduction of nearly 2,400 jobs, or 5 percent of its global workforce. The company also said it will take charges totaling 50 cents to 60 cents a share in the fourth quarter of 2012. Shares were slightly lower in extended-hours trading. (Click here for after-hours quote)
Amgen - The biopharmaceutical company posted earnings $1.67 a share, excluding one-time items, on sales of $4.32 billion, topping estimates for $1.47 a share on revenue of $4.25 billion. In addition, the company lifted its full-year 2012 earnings and sales guidance to above Street forecasts, sending shares higher in extended-hours trading. (Click here for after-hours quote)
Gilead Sciences - he biotechnology company posted earnings of $1 a share, excluding one-time items on sales of $2.43 billion, topping estimates for 94 cents a share on revenue of $2.34 billion. Shares edged higher in extended-hours trading. (Click here for after-hours quote)
Norfolk Southern - The railroad company posted earnings of $1.24 a share, beating expectations by a penny, but revenue was slightly lighter than expected. Shares were flat in extended-hours trading. (Click here for after-hours quote)
Juniper Networks - he networking equipment manufacturer posted earnings of 22 cents a share on revenue of $1.12 billion, topping estimates for 17 cents a share on sales of $1.06 billion. Shares gained in extended-hours trading. (Click here for after-hours quote)
Panera Bread - The bakery and cafe chain posted earnings of $1.24 a share on revenue of $529 million, topping estimates for $1.19 a share on sales of $522 million. In addition, the company raised its fourth-quarter and full-year 2012 earnings guidance, sending shares higher in extended-hours trading. (Click here for after-hours quote)
Buffalo Wild Wings - The casual dining restaurant and sports bar chain posted earnings of 57 cents a share on revenue of $247 million, missing estimates for 60 cents a share on revenue of $254 million. Shares declined in extended-hours trading. (Click here for after-hours quote)
Tempur-Pedic - The mattress producer posted earnings of 70 cents a share on revenue of $348 million. Analysts expected the company to post earnings of 69 cents a share on revenue of $364 million. In addition, the company slashed its full-year 2012 earnings and revenue guidance, sending shares sharply lower in extended-hours trading. (Click here for after-hours quote)
RF Micro Devices - he tech company posted earnings and revenue that topped estimates, sending shares sharply higher in extended-hours trading. (Click here for after-hours quote.)
VMWare - The tech company posted earnings of 70 cents a share, topping expectations for 63 cents a share, and revenue that matched estimates. Shares edged higher in extended-hours trading. (Click here for after-hours quote)
HCA Holdings - The private operator of health care facilities announced a special dividend of $2.50 a share, which is expected to be funded through borrowings under the company's credit facilities. (Click here for after-hours quote)
(Read More: CNBC's Market Insider Blog)
—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)
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