Check out the companies making headlines after the bell Monday.
Shares of Thor Industries soared more than 10 percent in after-hours trading, after the Indiana-based recreational vehicle manufacturer posted record earnings and revenue that beat Wall Street expectations.
UnitedHealth Group shares slipped more than 1 percent in extended trading, after the health-insurance giant revealed a lighter-than-expected earnings forecast for 2018.
Tech Data shares climbed more than 4.5 percent after the bell Monday, after the IT distribution company posted third-quarter financial results.
Shares of Iqvia Holdings slipped more than 1 percent after the bell. The biopharmaceutical development and commercial outsourcing services provider announced a new share-buyback program.