Check out which companies are making headlines after the bell Monday:
American International Group - The insurer reported earnings per share of $1.25 on revenue of $8.53 billion in revenue, versus expectations of EPS of $1.05 a share on $7.72 billion in sales. Shares gained in after-hours trading.
Avis Budget Group - The car-rental company raised its full-year earnings and revenue guidance, with its shares rising in after-hours trading.
CVS Caremark - The drugstore chain rose in after-hours trading ahead of its scheduled earnings before Tuesday's open.
LeapFrog Enterprises - The maker of educational toys fell in after-hours trading after posting weak first-quarter results and full-year guidance that disappointed.
Tenet Healthcare - The operator of hospitals and related facilities fell in after-hours trading after posting second-quarter results.
—By CNBC's Kate Gibson
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