https://www.gamespot.com/articles/nintendo-switch-outsold-xbox-one-and-ps4-in-decemb/1100-6456109/

The NPD Group will release its report for December 2017 video game hardware and game sales in the United States later this month. It appears Microsoft has already seen this report, as Xbox marketing boss Aaron Greenberg shared some results on Twitter recently.

He announced on Twitter that the Xbox One had its "highest console share" ever in December in the US. The Xbox One outsold the PlayStation 4 in December, according to NPD's data, though it was the Nintendo Switch that sold the most units overall during the month.