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Check out which companies are making headlines after the bell Tuesday:
Amgen - The biotechnology company advanced in extended-hours trading after tallying better-than-estimated fourth-quarter profit.
Apple - The maker of consumer technology gained in after-hours trading after reporting beats on both its top and bottom lines.
AT&T - The wireless carrier rose in extended-hours trading after it reported fourth-quarter revenue above estimates.
Electronic Arts - The video game publisher advanced after posting an almost 40 percent gain in quarterly profit.
Yahoo - The search engine jumped after saying it would spin off its remaining stake in Alibaba Group Holding.
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