Check out which companies are making headlines after the bell Monday:
Caterpillar - The heavy-equipment maker updated its 2015 earnings forecast to between $12 a share and $18 a share and revenue to between $80 billion and $100 billion.
"Just as we have done in the past, Caterpillar is ready to act if we enter a recession," said CEO Doug Oberhelman in a press release. "We don't think it's likely, but if it happens, we are prepared to react and would expect to remain attractively profitable and to maintain our dividend."
Shares slipped in extended-hours trading. (Click here for after-hours quote.)
Facebook and Apple - Both tech stocks were narrowly mixed. Facebook tumbled more than 9 percent in the regular session, while Apple declined nearly 1.5 percent. (Click here for after-hours quotes.)
Pandora - Nomura initiated coverage of the Internet radio operator with a "reduce" rating and a price target of $8.50. (Click here for after-hours quote.)
Red Hat - The software company posted earnings of 28 cents a share, excluding one-time items, on revenue of $323 million. Analysts expected the company to post earnings of 29 cents a share on revenue of $322 million. Shares tumbled in extended-hours trading. (Click here for after-hours quote.)
Paychex - The payroll and human resource service company posted earnings of 42 cents a share, edging past expectations for 41 cents a share. But the firm reported a lighter-than-expected revenue at $578 million versus expectations for $584 million. Shares wobbled in extended-hours trading. (Click here for after-hours quote.)
—By CNBC’s JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)
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