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Fact Sheet RST Treuhand AG

Core Company Information
Company Name RST Treuhand AG
UID CHE-105.969.050
Alternative / previous Names RST Revisions-, Steuerberatungs- und Treuhand AG, RST Révisions, Consultations fiscales, Fiduciaire SA, RST Auditing, Tax counselling and Trust Company Ltd, RST Ufficio Fiduciario di Revisione e di Consultazione fiscale SA (until 27.09.2018)
Domicile Basel
Canton BS
Legal Form Limited corporation
Inscription Date 03.06.1953
FAOA Information
FAOA ID 500681
RAB Permission licensed audit expert
FAOA License cancelled (active from 26.10.2007 until 23.12.2025)
Link to FAOA website View auditor profile at FAOA
Branch offices (0) RST Revisions-, Steuerberatungs- und Treuhand AG (CHE-306.735.219) in Zürich (ZH)
Membership in Associations EXPERTsuisse
Number of auditors with permission -
Auditor Statistics

Average engagement duration: 15 years (max.: 24.4 years)

Total number of statutory audit clients: 8 (Ranked #205 in Switzerland)

Change in number of audit engagements: - (since 31.12.2025), -97 (over the last 12 months)

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

  Aargau Basel Landschaft Basel Stadt Solothurn ∑
Limited corporation     3 2 5
Foundation   1 1   2
Cooperative 1       1
∑ 1 1 4 2 8

This audit firm is recorded as statutory auditor for 75 deleted entities. These are not included in the table above.

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Audit Engagements by Branch Office

The 8 statutory audits are performed by the branch offices as indicated in the table below.

  Aargau Basel Landschaft Basel Stadt Solothurn ∑
Basel 1 1 4 2 8
∑ 1 1 4 2 8

Show client list for Basel.

Related audit firms

Direct personal relationship:

Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
Venus Diagnostics Group AG CHE-216.928.179 Schönenbuch 08.04.2025 First auditor Basel
Venus Diagnostics HoldCo AG CHE-146.454.027 Schönenbuch 08.04.2025 First auditor Basel
CG Group Holding AG CHE-458.419.424 Basel 07.01.2025 First auditor Basel
MPI Technologies AG CHE-107.405.108 Baden 11.04.2024 Auditor switch Basel
MPL AG Elektronik-Unternehmen CHE-103.482.848 Baden 11.04.2024 Auditor switch Basel
Discontinued audit engagements
The following audit engagements were lost recently, either to a competitor, due to auditor resignation or due to an opting out.
 
Client Name Client UID Domicile End Date Reason Auditor Branch
BÜHLMANN Laboratories AG CHE-107.878.027 Schönenbuch 23.12.2025 Auditor switch Basel
Venus Diagnostics Group AG CHE-216.928.179 Schönenbuch 23.12.2025 Auditor switch Basel
Venus Diagnostics HoldCo AG CHE-146.454.027 Schönenbuch 23.12.2025 Auditor switch Basel
SFD - Stiftung für Drogenarbeit CHE-487.185.168 Basel 19.12.2025 Auditor switch Basel
HARTMANN MATERIALS AG CHE-342.743.108 Fehraltorf 18.12.2025 Auditor switch Basel