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Fact Sheet Grant Thornton AG

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.

  AG AI AR BE BL BS FR GE GR JU LU NE NW OW SG SH SO SZ TG TI VD ZG ZH
Limited corporation 6 2 1 6 1 13   48 16 1 10 5 1 1 33 1 3 20 2 4 22 109 117 422
Limited liability company       1 2   2 7 1     3 2   3 2   2   1 11 25 22 84
Foundation           2   17     2   2 1 2 1 4 3 1   1 15 28 79
Cooperative           1                         1     1 1 4
Association       1       1                           3 6 11
Special legal forms                                   1           1
6 2 1 8 3 16 2 73 17 1 12 8 5 2 38 4 7 26 4 5 34 153 174 601

This audit firm is recorded as statutory auditor for 113 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

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

  AG AI AR BE BL BS FR GE GR JU LU NE NW OW SG SH SO SZ TG TI VD ZG ZH
Buchs (SG)       1       1 16 1         26       2 1 1 2 3 54
Genève       1     2 62       6               2 30 6 2 111
Zürich 6 2 1 6 3 16   10 1   12 2 5 2 12 4 7 26 2 2 3 145 169 436
6 2 1 8 3 16 2 73 17 1 12 8 5 2 38 4 7 26 4 5 34 153 174 601

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

Related audit firms

Network:

Total number of audit engagements across the network: 604

Further connections:

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