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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 42  (15.12 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 7.6 years (max.: 30.5 years)

Total number of statutory audit clients: 635 (Ranked #11 in Switzerland)

Change in number of audit engagements: +16 (since 31.12.2025), +36 (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 UR VD VS ZG ZH ∑
Limited corporation 5 2 1 7 1 16   48 18 1 8 6   1 36 1 4 23 3 9 1 22 1 114 119 447
Limited liability company 1     1 1 2 2 7 1   2 3 2   3 2   2   2   8   25 23 87
Foundation           2   18     2   2 1 4 1 4 3 1     1   18 28 85
Cooperative           1                         1         1 1 4
Association       1       1                               3 6 11
Special legal forms                                   1               1
∑ 6 2 1 9 2 21 2 74 19 1 12 9 4 2 43 4 8 29 5 11 1 31 1 161 177 635

This audit firm is recorded as statutory auditor for 118 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 635 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 UR VD VS ZG ZH ∑
Buchs (SG)       2       1 17 1         26     1 2 2   1   1 3 57
Genève       1   2 2 63       7               2   27   6 5 115
Zürich 6 2 1 6 2 19   10 2   12 2 4 2 17 4 8 28 3 7 1 3 1 154 169 463
∑ 6 2 1 9 2 21 2 74 19 1 12 9 4 2 43 4 8 29 5 11 1 31 1 161 177 635

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

Related audit firms

Network:

Total number of audit engagements across the network: 636

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
AICA SA CHE-307.495.118 Prilly 08.04.2026 Auditor switch Genève
MCL - Dr. Risch AG CHE-105.875.911 Köniz 07.04.2026 Auditor switch Buchs (SG)
Gaston Schul Zoll-Fit GmbH CHE-112.205.650 Rheinfelden 31.03.2026 Auditor switch Zürich
SBorg SA CHE-198.086.882 Lausanne 25.03.2026 First auditor Zürich
Jagotec AG CHE-101.361.754 Basel 18.03.2026 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
LABHA AG CHE-112.468.735 Zürich 01.04.2026 Auditor switch Zürich
Verbio International AG CHE-219.574.132 Lancy 11.03.2026 Auditor switch Zürich
NS Partners Holding SA CHE-441.116.731 Commugny 04.02.2026 Auditor switch Genève
Chest Holding AG CHE-113.947.582 Zürich 16.01.2026 Auditor switch Zürich
Nordsüd Asset Management AG CHE-103.552.489 Zürich 12.01.2026 Auditor switch Zürich