Grant Thornton AG - Audit Firms

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Core Company Information

Company Name	Grant Thornton AG
UID	CHE-107.841.337
Alternative / previous Names	Grant Thornton Ltd., Grant Thornton SA Bankrevisions- und Treuhand AG, Révision de Banques et Fiduciaire SA, Bank Auditors and Fiduciary Ltd (until 15.07.2014) Grant Thornton Bankrevision AG, Grant Thornton Bank Audit Ltd., Grant Thornton Révision Bancaire SA (until 24.06.2019)
Domicile	Zürich
Canton	ZH
Legal Form	Limited corporation
Inscription Date	25.10.1971
Takeovers:	Grant Thornton Advisory AG (CHE-100.726.095), per 24.06.2019 Grant Thornton AG (CHE-109.041.827), per 24.06.2019 Grant Thornton Spiess SA (CHE-102.004.156), per 02.06.2021 GwG Prüfung und Beratung AG (CHE-284.229.555), per 07.03.2025 TEBOR Treuhand AG (CHE-106.237.682), per 18.06.2018

FAOA Information

FAOA ID	500038
RAB Permission	state-regulated audit firm
FAOA License	active (since 26.11.2007)
Link to FAOA website	View auditor profile at FAOA
Branch offices (2)	Grant Thornton AG (CHE-394.243.600) in Buchs (SG) (SG) Grant Thornton AG (CHE-153.284.948) in Genève (GE)
Membership in Associations	EXPERTsuisse SVIR
Number of auditors with permission	41 (14.66 audit engagements per employee on average)

Auditor Statistics

Average engagement duration: 7.6 years (max.: 29.8 years)

Total number of statutory audit engagements: 601 (Ranked #11 in Switzerland)

Change in number of audit engagements: +3 (since 31.12.2024), +10 (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 113 deleted entities. These are not included in the table above.

Audit Engagements by Branch Office

The 601 statutory audits are performed by the branch offices as indicated in the table below.

Show client list for Buchs (SG), Genève, Zürich.

Related audit firms

Network:

Total number of audit engagements across the network: 604

Further connections:

V.T. Verwaltungs-Treuhand AG in Liquidation (CHE-102.096.187), 0 audit engagements
awit wirtschaftsprüfer AG (CHE-102.730.038), 0 audit engagements
Amberg Controlling AG (CHE-107.958.117), 0 audit engagements
ReviTrust Audit AG (CHE-114.760.750), 0 audit engagements
Fasser & Leuenberger, Steuerberatung, Buchhaltung, Revisionen (ADM-309.347.664), 0 audit engagements
Grant Thornton Wirtschaftsprüfung AG (CHE-106.671.133), 0 audit engagements

Latest audit engagements

These are this auditor's latest audit engagements.

Client Name	Client UID	Domicile	Start Date	Type of switch	Auditor Branch
KPMG AG	CHE-106.084.881	Zürich	14.07.2025	Auditor switch	Zürich
Onchain Ventures AG	CHE-340.125.678	Zug	11.07.2025	First auditor	Zürich
Scrypt Digital Hodling AG	CHE-215.301.150	Zug	10.07.2025	First auditor	Zürich
Putzfrauen-Rapid AG	CHE-243.351.325	Zürich	09.07.2025	First auditor	Zürich
Insmed Switzerland GmbH	CHE-148.035.144	Zug	08.07.2025	First auditor	Zürich

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
TOLDO Strassen- und Tiefbau AG Wetzikon	CHE-350.490.837	Wetzikon (ZH)	08.07.2025	Auditor switch	Buchs (SG)
Toldo Holding AG	CHE-103.387.138	Buchs (SG)	30.06.2025	Auditor switch	Buchs (SG)
Toldo Rückbau AG	CHE-115.561.360	Sevelen	30.06.2025	Auditor switch	Buchs (SG)
Toldo Strassen- und Tiefbau AG Landquart	CHE-107.433.168	Landquart	30.06.2025	Auditor switch	Buchs (SG)
IROC Lasercenter AG	CHE-112.054.374	Zürich	20.06.2025	Opting-out	Zürich