UPS CEO Carol Tome said on a call with investors that Amazon is UPS’ largest customer but that it isn't its most profitable ...

UPS announced a seismic shift in the relationship with its largest customer, Amazon, prompting a sharp stock price drop ...

Its ability to make money has been constrained by the fact that Amazon is both its largest customer and competitor ...

Full-service fulfillment companies offer up an end-to ... you'll want to use the major package delivery companies--Federal Express, UPS or the U.S. Postal Service, since they're considered the ...