C# Minor Major 9th, 1st inversion (E in the bass)
Also written as C#m(maj9)/E.
Notes, from the bass up
E (bass)G#B#D#C#
The same notes as C# Minor Major 9th (E, G#, B#, D# and C#), rearranged so E is the lowest note. Use it to move between chords with smaller jumps across the keyboard.