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Solidis AG - EN
Martin-Disteli-Strasse 9
4600 Olten, CH
Tel. +41 62 207 30 40
AdobeStock 324473547 ¦ Partnership


TAG Alliances® ¦ Globally Connected. Locally Respected.


TAG Alliances® is one of the world’s largest multi-disciplinary alliances of independent professional service providers with more than 290 member companies in over 110 countries and more than 18,000 specialists. The combination of TAGLaw®, TIAG® (The International Accounting Group) and TAG-SP® (Strategic Partners) makes TAG Alliances a relationship-oriented, global community of law firms, accountants and other professional service providers with the goal of offering high-quality, cost-efficient, value-oriented services.

Logo netzwerkTREUHAND ch

>> is an active association of seven independent business services and auditing companies. Our approximately 35 experts and 75 employees throughout Switzerland can offer more than 600  years of combined industry experience.


BMU Treuhand AG, Chur

Merki Treuhand AG, Baden 

Rotmonten Treuhand AG, St. Gallen

Thalmann Treuhand AG, Weinfelden

Treuhand-Zentrum AG, Muri b. Bern

Tschanz Treuhand AG, Lyss

Benefits of our service

Our memberships in the two networks enable us to serve you in Switzerland and internationally and allow you access to local specialists who can take care of your concerns with a personal touch and expertise, just like you are used to from us.