Art & Project (Firma) (1968-2001)(4)
Cusack Gallery (Houston, Tex.)(2)
Bayerische Staatsgemäldesammlungen(1)
Galerie Yvon Lambert (1966-2014)(1)
Heiner Friedrich (Firma) (1970-1980)(1)
Jack Wendler Gallery (London)(1)
Konrad Fischer Galerie (1997-)(1)
Leo Castelli Gallery (1957-)(1)