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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: n/a years (max.: n/a years)

Total number of statutory audit clients: 0 (Ranked #n/a in Switzerland)

Change in number of audit engagements: -7 (since 31.12.2025), -79 (over the last 12 months)

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
Stiftung Basel-Loge	CHE-351.216.641	Basel	05.06.2026	Discontinued	Basel
Zähringer Wohnbaugenossenschaft Rheinfelden	CHE-103.594.111	Rheinfelden	03.03.2026	Auditor switch	Basel
Stiftung Offenes Lernen	CHE-114.916.495	Liestal	27.01.2026	Auditor switch	Basel
FURKA Reibbeläge AG	CHE-109.273.711	Breitenbach	23.01.2026	Auditor switch	Basel
Rohrer Suisse AG	CHE-392.111.979	Lohn-Ammannsegg	23.01.2026	Auditor switch	Basel