Take a look at some of Monday's after-hours buzz:
Juniper Networks moved lower in after-hours trade on news that Rami Rahim would replace Shaygan Kheradpir as CEO.
Rackspace rose more than 1 percent in extended-hours trade after the cloud computing company posted third-quarter earnings and revenue that beat expectations.
Caesars Entertainment fell more than 6 percent in after-hours trade after third-quarter results showed a loss of $6.29 a share.
Halcon Resources fell more than 7 percent in extended-hours trade after the oil and gas producer said it is cutting about half the rigs it had planned to operate next year because of the slide in crude oil prices.
Hertz Global declined more than 1 percent in after-hours trade after the car rental company said it would delay filing its quarterly report.
Alibaba continued to gain in extended-hours trade as the first hour of Singles' Day in China brought in $1 billion.
FireEye edged lower in after-hours trade on the cybersecurity firm's report about a vulnerability in Apple's iOS operating system that could allow hackers to access sensitive data and control iPhones and iPads. Apple did not move significantly in extended-hours trade.
Reuters contributed to this report.