Sony offers up a list of its planned Marshmallow upgrades

Here's the list in full:

Xperia Z5
Xperia Z5 Compact
Xperia Z5 Premium
Xperia Z4 Tablet
Xperia Z3+
Xperia Z3
Xperia Z3 Compact
Xperia Z3 Tablet Compact.
Xperia Z2
Xperia Z2 Tablet
Xperia M5
Xperia C5 Ultra
Xperia M4 Aqua
Xperia C4