Check out which companies are making headlines after the bell Monday:
Amgen - The biotechnology company reported earnings per share of $2.30, excluding items, on $5.03 billion in revenue versus expectations of an EPS of $2.11 on sales of about $4.96 billion. Its shares gained in after-hours trading.
Buffalo Wild Wings - The operator of franchise restaurants climbed in after-hours trading after reporting third-quarter earnings that beat expectations.
Crocs - The maker of casual footwear declined after reporting results for the third quarter, which included disappointing revenue guidance for the fourth quarter.