A major add9 chord is created by adding a 9th degree to any major chord. For example, a Cadd9 chord contains the notes C, E, G and D (1, 3, 5 and 9). Here are some common open major add9 chord shapes.
Cadd9

Dbadd9

Dadd9

Ebadd9

Eadd9

Bbadd9

Gadd9

Fadd9

F#add9

Abadd9

Aadd9

Badd9
