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Solidis AG - EN
Solidis AG - EN
Martin-Disteli-Strasse 9
4600 Olten, CH
Tel. +41 62 207 30 40
revision@solidis.ch
Solidis AG - EN
Solidis AG - EN
AdobeStock 357211458 ¦ Insight

History

We have been here for you for more than 100 years!

Solidis Revisions AG & Solidis Treuhand AG

Logo Solidis

2021

Tamara Schwarzenbach becomes a partner

2021

Thomas Frischknecht withdraws as a partner and leaves “Solidis”

2020

Dominik Frauchiger becomes a partner

2020

Peter Gubler und Kurt Frauchiger withdraw as partners but remain with us as advisors

2014

Karin Trümpy becomes a partner

2014

Consolidation of our locations to Martin-Disteli-Strasse 9 in Olten


Sudan Partner AG

Logo Sudan Partner AG

2014

Change of name to Solidis Revisions AG

2014

Philipp Schlatter becomes a partner

1998

Change of name to Sudan Partner AG

1994

Reto Gribi becomes a partner

1985

Kurt Frauchiger becomes a partner

1983

Peter Gubler becomes a partner

1978

Edmund J. Blum introduces the partnership model

1976

Change of legal form to Adr. Sudan AG für Revision und Steuerberatung

1941

Adrien Sudan takes over the office and continues to manage it as a sole proprietorship

1917

Eugen Nagel founds a notary’s office in Olten


TRO Treuhand & Revisions AG

Logo TRO Treuhand & Revisions AG

2014

Change of name to Solidis Treuhand AG

2014

“TRO” is taken over by Sudan Partner Holding AG

1971

Change of legal form to Treuhand & Revisions AG Olten “TRO”

1946

Founding of the general partnership Schenker & Daetwiler

1941

Ernst Schenker opens a business services office as a sole proprietorship


Active partners

Our company has been managed by the owners as a partnership since it was founded in 1917. Currently, the responsibility is shared by 5 partners.