The list:  (in alphabetical order, or at least it should be and some helpful letters to like they have in Wikipedia)

#

100%

15&

24K

2eyes 

4Ten

A

A.DE

After School

A-JAX

AlphaBat

APRIL

B

B1A4

BEATWIN

Bestie 

B.I.G.

Bigflo 

BIGSTAR

Boyfriend

Boys24

Boys Republic

Brave Girls

BULLDOK

C

C-Clown (Crown Clown)

CLC

Cosmic Girls

Crayon Pop

Cross Gene

D

Dal Shabet

Day6

DGNA (The Boss)

DIA 

DMTN

Dreamcatcher

E

F

F.Cuz

Fiesta

G

Gugudan

H

Hello Venus

HIGH4

History

HOTSHOT

I

I.B.I

Imfact

J

JJCC

K

K.A.R.D

KNK

L

Laboum

Ladies' Code

Lunafly

LU:KUS

M

Madtown

MAP6

MBLAQ

Melody Day

M.I.B

Momoland

Monsta X 

M.Pire

Mr.Mr

MYNAME

N

N.Flying

Nine Muses

N.Sonic

Nu'EST

O

Oh My Girl

P

Purflesh

Q

R

Rania

Romeo

Royal Pirates

S

SF9

Snuper

Speed

Spica

SS501

Ste