As FedEx told its investors, only 1.3 percent of its 2018 revenue came from Amazon. It says it's prepared to serve "thousands" of retailers in the e-commerce space, which it expects to grow from 50 million packages to 100 million packages per day in the US by 2026. "We are excited about the future of e-commerce and our role as a leader in it," FedEx said. This decision won't impact international deliveries or contracts between Amazon and other FedEx business units, such as FedEx Ground.

The news may not be too concerning for Amazon, as the company has other carriers to choose from. It's also working on its own drone delivery service. Just this week, it released new details, stating that it hopes the drones will have a 15-mile range and the ability to haul packages under 5lbs to customers within 30 minutes. It's not yet clear when the fleet will be ready or if the loss of this FedEx contract will be any incentive to speed things up.

Update: An Amazon spokesperson has responded to the move with a one-line statement.