iPhone 6, Apple Pay help keep Apple ranked 15th in global Fortune 500 rankings

The Global 500 charts the world's biggest corporations according to revenue for the fiscal year ending March 31. By Forbes' tally, Apple's revenue hit nearly $182.8 billion, up 7 percent from 2014. The company reaped $39.5 billion in profits, an increase of 6 percent.

Because Fortune's data ends in March, the list doesn't account for Apple's latest quarterly results, which saw $49.6 billion in revenue. It also doesn't factor in the launches of the Apple Watch or Apple Music.

One of Apple's chief rivals, Samsung Electronics, held on to 13th place with $195.8 billion in revenue. The company operates in a much broader array of product categories however, including TVs, cameras, home appliances, and computer parts.

Maintaining the top spot on the list was discount retailer Walmart, which saw revenue rise to $485.7 billion. Other companies in the top 10 were typically petroleum giants like Sinopec, Shell, and Exxon Mobil, some exceptions being carmakers Toyota and Volkswagen, and Chinese utilities giant State Grid.