DESIGN STUDIO

うちみたいな社名多いだろうなと調べたら「O（オー）」に空きがあるようです笑。（ググってでたのをピックアップ。リンク先は調べてません）
Design Studio A
Design Studio B
Design Studio C
Design Studio D
E Design Studio
Design Studio F
Studio G Design
Design Studio H
i Design Studio
Studio J Design
Design Studio K
Design Studio L
Design Studio M
N Design Studio
Studio-P Design
Q Design Studio
R design studio
Design Studio S
design studio T.
Design Studio U
Studio V Design
Studio W Design
Design Studio X
DesignStudio Y
Studio Z Design
数字も。
Design Studio ZERO
Studio 1 Design
Design Studio2
Studio 3 Design
Design Studio 4
Design Studio 5
Design Studio 6
Studio7 Design
DESIGNSTUDIO8
Design Studio 9
DESIGN STUDIO TEN
＜追記＞
「O（オー）」じゃないけど、OH! Design Studioはあった。