The C major sixth-ninth chord (abbreviated "C6/9 chord") is a five-note chord consisting of the notes C, E, G, A, and D. The chord is formed by adding a major sixth and a major ninth to a C major chord.

Name
C major sixth-ninth chord
Notes
C E G A D
Intervals
1 3 5 6 9
Chord symbol
C6/9
Alternative symbols
C6add9 C6(add9)
Type
Pentad (five-note chord)

C6/9 chord on piano

C6/9 chord on guitar

C6/9 chord on ukulele

C6/9 chord on the staff