KEY POINTS
  • AWS finished the fourth quarter with 62 percent market share, down from 68 percent a year earlier, KeyBanc analysts said.
  • Microsoft's Azure growth is one reason that KeyBanc analysts raised their price target for the company heading into 2018.
Satya Nadella speaking at the 2016 World Economic Forum in Davos, Switzerland.

Amazon lost share in the public cloud business in the fourth quarter, while Microsoft continued to gain momentum, according to research from KeyBanc analysts.

Amazon Web Services had 62 percent market share in the quarter, down from 68 percent a year earlier, KeyBanc's Brent Bracelin and other analysts wrote in a note on Thursday. Microsoft Azure jumped from 16 percent to 20 percent, and Google's share increased from 10 percent to 12 percent, they said.