Get detailed statistics about any audit firm in Switzerland. Just type the auditor name in the field below and off you go!

Fact Sheet Grant Thornton AG

Core Company Information

Company Name	Grant Thornton AG
UID	CHE-107.841.337
Alternative / previous Names	Grant Thornton SA, Grant Thornton Ltd 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) Grant Thornton Ltd., Grant Thornton Ltd., Grant Thornton SA (until 22.10.2025)
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	40 (15.58 audit engagements per employee on average)

Auditor Statistics

Average engagement duration: 7.7 years (max.: 30.1 years)

Total number of statutory audit engagements: 623 (Ranked #11 in Switzerland)

Change in number of audit engagements: +24 (since 31.12.2024), +27 (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 114 deleted entities. These are not included in the table above.

Audit Engagements by Branch Office

The 623 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: 625

Direct personal relationship:

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
Corvatsch Invest AG	CHE-161.185.001	Chur	05.11.2025	First auditor	Buchs (SG)
Evatec AG	CHE-111.705.163	Wartau	04.11.2025	Auditor switch	Zürich
Personalvorsorgestiftung der OC Oerlikon Balzers AG	CHE-110.307.587	Wartau	03.11.2025	Auditor switch	Zürich
Vita Tertia AG	CHE-474.773.580	Gossau (SG)	30.10.2025	Auditor switch	Zürich
NewKlop AG	CHE-158.063.082	Baar	24.10.2025	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
CSN Mining International GmbH	CHE-158.411.355	Zug	14.10.2025	Auditor switch	Zürich
Astara Ital Switzerland AG	CHE-105.818.020	Wallisellen	08.10.2025	Auditor switch	Zürich
Astara Mobility Switzerland AG	CHE-262.166.165	Wallisellen	08.10.2025	Auditor switch	Zürich
Touchdown AcquiCo AG in Liquidation	CHE-296.089.427	Zug	07.10.2025	Auditor switch	Zürich
Clarios Schweiz GmbH	CHE-102.764.787	Zug	01.10.2025	Opting-out	Zürich