Amazon's cloud business exceeded analyst estimates, with revenue climbing 49 percent in the first quarter.
Amazon Web Services reported sales on Thursday of $5.44 billion, compared to the $5.26 billion average estimate of analysts surveyed by FactSet. AWS contributed about 11 percent of Amazon's total revenue for the period, up from 8.5 percent in the prior quarter.
AWS continues to be a big revenue driver and even larger profit engine for its parent company, which dominates the low-margin e-commerce market. In cloud-computing infrastructure, Amazon has a substantial market share lead over Microsoft Azure, Google's Cloud platform and IBM, as well as other players like Alibaba and Oracle.