1993/94
Bissier, Klee, Tobey, Kunstmuseum St. Gallen, Switzerland
1994
Dream of the Absolute - From Malevich to Ryman, Galerie Beyeler, Basel, Switzerland
Morris Graves. Mark Tobey, Schmidt Bingham Galleries, New York
1995
Wer hat Angst vor Rot ..?, Galerie Beyeler, Basel, Switzerland
Augenschein und Inbegriff - Wandlungen der gegenstandsfreien Kunst, Galerie Döbele, Stuttgart, Germany
The Exhibition of Swiss Private Collections, Hokkaido Museum of Art, Sapporo; Huis ten Bosch Museum of Art and Municipal Museum of Art, Kyoto; Mitsukoshi Museum of Art, Tokyo, Japan
1996
Signs & Symbols, Barbara Mathes Gallery, New York
1997
Affinities with the East, Robert Miller Gallery, New York
1998
Three Americans, Tobey - Francis - Jenkins, Galerie Iris Wazzau, Davos, Switzerland
Original Scale, Apex Art Curatorial Program, New York
1999/2000
Kunstwelten im Dialog - Von Gauguin zur globalen Gegenwart, Museum Ludwig, Cologne, Germany
2000
Zen und die westliche Kunst, Museum Bochum, Germany
Native American Influences on 1930s & 1940s Modernists, David Findlay Jr. Fine Art, New York
Cross-Currents in Modern Art, Achim Moeller Fine Art, New York
2001
La espiritualidad del vacío / The spirituality of the void, Fundación Bancaja, Valencia, Spain