In 1991 Galerie Marc Jancou was established in Zurich. Marc Jancou initially supported the work of then-emerging artists, featuring exhibitions of many prominent figures such as: Miroslaw Balka, Karen Kilmnik, Raymond Petition, Hiroshi Sugimoto and John Wesley, among others. In 1996 Jancou, moved to London with his London Projects gallery showcasing an expanding diversity of Contemporary artists, which included: Chris Burden, Carroll Dunham, Martin Kippenberger and Cindy Sherman. Marc Jancou was established in 2003 in New York. From 2006 to 2007, the gallery residency program based at the Me.di.um Gallery on the Caribbean island of Saint Barthélemy facilitated 25 residencies, and several exhibitions by artists including: David Noonan, Steve Claydon, Kelley Walker and Carter, among others. 2011 marked the opening of a second exhibition space in Geneva, in the heart of the city’s art community, Le Quartier des Bains. The new space created a trans-Atlantic creative dialogue. The galleries presented solo exhibitions by artists such as John Miller, Mike Kelley, Sherrie Levine, and Larry Johnson, Stéphane Kropf, Albrecht Schnider, Alan Uglow, Nick Lowe, Michael Cline, Marnie Weber, and Erica Baum.
Since opening his first gallery in 1991, Marc Jancou has supported numerous contemporary art projects and artists at various stages in their careers. Through residency programs, solo exhibitions, gallery publications, and collaborations with creative organizations and institutions he has been a key proponent in the development of both established and emerging artist alike.