Default [Q] Xperia Z2 .402 firmware updates not showing in US?

Hi guys,

I was searching the web to see what the latest firmware is for the Xperia Z2, and it appears to be .402, though I also saw some mention of .438.

However, I'm in the US and am still sitting on .314. Sony PC Companion says I am up to date and does not detect any available updates.

Am I missing something, or is .314 really the latest available firmware version?