Check out which companies are making headlines after the bell Tuesday:
Alcoa - The Dow component posted 3 cents a share, excluding one-time items, on revenue of $5.83 billion. Analysts expected the aluminum producer to post a break-even quarter on sales of $5.54 billion. Shares gained in extended-hours trading. (Click here for after-hours quote.)
(Read More: Dow Snaps 3-Day Rally, Global Worries Weigh)
Yum Brands - The parent company of Pizza Hut and KFC posted earnings of 99 cents a share, edging past expectationsfor 97 cents a share. Revenue was $3.57 billion, slightly lighter than expected. The company raised its full-year earnings forecast to at least $3.24 a share, but the guidance was still below Street expectations for $3.26 a share. Shares climbed in extended-hours trading. (Click here for after-hours quote.)
Chevron - The oil giant reported in its interim report that third-quarter earnings are expected "substantially lower" than in the previous quarter. The company is scheduled to post results on November 2. Shares were lower in extended-hours trading. (Click here for after-hours quote.)
Zynga - The social game services provider fell in extended-hours trading after Piper Jaffray downgraded its rating on the stock to "neutral" from "overweight." Last week, the company cut its outlook for the full year. Facebook also traded lower after-hours. (Click here for after-hours quotes.)
Cummins - The heavy-equipment manufacturer lowered its full-year 2012 revenue guidance, sending shares sharply lower in extended-hours trading. In addition, the company said it plans to cut 1,000 to 1,500 employees by the end of the year. (Click here for after-hours quote.)
Best Buy - CFO Jim Muehlbauer will leave the consumer-electronics retailer at the end of the 2013 fiscal year. (Click here for after-hours quote.)
Microsoft - The tech giant announced Netflix CEO Reed Hastings will not seek re-election to Microsoft's board at the company's 2012 annual shareholders meeting. Hastings joined the board in March 2007.
Separately, Microsoft's board reduced CEO Steve Ballmer's bonus for violation of EU browser agreement and for weakness in the company's online division, according to the Wall Street Journal. Ballmer's total compensation in fiscal year 2012 will be $1.3 million, versus $1.4 million in fiscal year 2011, according to the report. (Click here for after-hours quotes.)
International Paper - The paper company boosted its quarterly dividend to 30 cents a share from 26 cents a share. (Click here for after-hours quote.)
Piper Jaffray upgraded its rating on retailers Abercrombie & Fitch and Ralph Lauren to "overweight" from "neutral." Meanwhile, the brokerage downgraded American Eagle to "neutral" from "overweight." (Click here for after-hours quotes.)
(Read More:CNBC's Market Insider Blog)
—By CNBC’s JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)
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