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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 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
IIAS
Number of auditors with permission 45  (13.98 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 7.7 years (max.: 30.8 years)

Total number of statutory audit clients: 629 (Ranked #11 in Switzerland)

Change in number of audit engagements: +9 (since 31.12.2025), +26 (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 GL GR JU LU NE NW OW SG SH SO SZ TG TI UR VD VS ZG ZH ∑
Limited corporation 5 2 1 6 1 16   47 2 17 1 7 6 1 1 37 1 4 23 3 10 1 21 1 112 115 441
Limited liability company 2     1 1 2 2 8   1   2 3 2   3 2   2   2   8   23 23 87
Foundation           2   17       2   2 1 4 1 4 4 1     1   18 29 86
Cooperative           1                           1         1 1 4
Association       1                                         3 6 10
Special legal forms                                     1               1
∑ 7 2 1 8 2 21 2 72 2 18 1 11 9 5 2 44 4 8 30 5 12 1 30 1 157 174 629

This audit firm is recorded as statutory auditor for 128 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 629 statutory audits are performed by the branch offices as indicated in the table below.

  AG AI AR BE BL BS FR GE GL GR JU LU NE NW OW SG SH SO SZ TG TI UR VD VS ZG ZH ∑
Buchs (SG)       1       1 2 16 1         27     1 2 2   1   1 2 57
Genève       1   2 2 62         7 1             2   26   6 5 114
Zürich 7 2 1 6 2 19   9   2   11 2 4 2 17 4 8 29 3 8 1 3 1 150 167 458
∑ 7 2 1 8 2 21 2 72 2 18 1 11 9 5 2 44 4 8 30 5 12 1 30 1 157 174 629

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

Related audit firms

Network:

Total number of audit engagements across the network: 630

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
Schlössli Sax AG CHE-100.680.636 Sennwald 14.07.2026 Auditor switch Buchs (SG)
Rodearte AG CHE-113.292.580 Zürich 10.07.2026 Auditor switch Zürich
AB Commodities AG CHE-454.384.152 Genève 26.06.2026 Auditor switch Genève
Aquila AG CHE-109.023.479 Zürich 26.06.2026 Auditor switch Zürich
Diffulivre SA CHE-107.933.755 Saint-Sulpice (VD) 23.06.2026 Auditor switch Genève
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
DKSH Schweiz AG CHE-107.880.981 Zürich 13.07.2026 Auditor switch Zürich
Securosys SA CHE-464.234.583 Zürich 09.07.2026 Auditor switch Zürich
MOCOH SA CHE-110.549.819 Genève 22.06.2026 Auditor switch Genève
CRONIMET Raw Materials Suisse AG CHE-100.182.781 Baar 29.05.2026 Opting-out Zürich
Madarex AG CHE-110.060.116 Zug 29.05.2026 Auditor switch Zürich