A Augmented Major 7th, 3rd inversion (G# in the bass)
Also written as Aaug(maj7)/G#.
Notes, from the bass up
G# (bass)AC#E#
The same notes as A Augmented Major 7th (G#, A, C# and E#), rearranged so G# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.