2016-09-26
Couple of days back Sony Slovakia held a press conference where the company via a presentation slide leak the information about when it's Xperia devices will start receiving the Android Nougat update.
As you can see in the above depicted slide image, the Sony Xperia X Performance and Xperia Z will be the first two devices to receive the update, something which will happen "around October". Next batch of the smartphone includes the Xperia X and X Compact sometime "around November".
And the December will see the update of Xperia Z5 series, the Xperia Z3+ and the Z4 tablet and the Xperia XA and XA ultra will receive the update in early 2017.
Source