Fact Sheet Thalmann Treuhand AG

Average engagement duration: 13.4 years (max.: 33.3 years)

Total number of statutory audit clients: 186 (Ranked #60 in Switzerland)

Change in number of audit engagements: -1 (since 31.12.2025), - (over the last 12 months)

Details regarding the distribution of the audit engagements across legal forms and cantons are depicted in the table below.

This audit firm is recorded as statutory auditor for 76 deleted entities. These are not included in the table above.

Display client list

Network:

• BMU Treuhand AG (CHE-115.321.376), 115 audit engagements
• Solidis Revisions AG (CHE-102.352.278), 185 audit engagements
• Rotmonten Treuhand AG (CHE-103.555.424), 16 audit engagements
• Treuhand-Zentrum AG (CHE-106.834.702), 0 audit engagements
• Tschanz Treuhand AG (CHE-109.601.382), 0 audit engagements
• Merki Treuhand AG (CHE-113.529.374), 0 audit engagements
• Rotmonten Wirtschaftsprüfung AG (CHE-205.494.662), 153 audit engagements

Total number of audit engagements across the network: 655

Direct personal relationship:

• witreva & Thalmann Treuhand AG (CHE-157.557.542), 12 audit engagements

Further connections:

• Hartbert Immobilien AG (CHE-102.122.548), 0 audit engagements
• Confina Treuhand AG (CHE-100.153.093), 0 audit engagements
• Tschanz-Treuhand (CHE-106.134.384), 0 audit engagements
• R + H Treuhand AG Lyss (CHE-107.170.767), 0 audit engagements
• mathys gmbh Treuhand und Unternehmensberatung (CHE-109.303.826), 0 audit engagements
• M-Treuhand und Unternehmensberatung, Theo und Monika Mathys (CHE-107.519.367), 0 audit engagements
• Confina Revisions AG (CHE-462.414.329), 12 audit engagements
• Solidis Treuhand AG (CHE-107.909.432), 0 audit engagements
• ReviCare GmbH (CHE-109.407.130), 9 audit engagements
• Juen Treuhand GmbH (CHE-104.853.545), 28 audit engagements
• H. Keller Revision und Treuhand AG (CHE-108.054.684), 21 audit engagements
• ERM Solutions AG (CHE-110.209.944), 0 audit engagements