Tired of renewing your auditor permission?

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

Fact Sheet Ernst & Young AG

Core Company Information
Company Name Ernst & Young AG
UID CHE-105.932.265
Alternative / previous Names Ernst & Young SA, Ernst & Young Ltd
ATAG Ernst & Young AG, ATAG Ernst & Young SA, ATAG Ernst & Young Ltd
Domicile Basel
Canton BS
Legal Form Limited corporation
Inscription Date 28.09.1998
Website https://www.ey.com/ch
Takeovers: ATAG Allgemeine Treuhand AG (CHE-100.818.892), per 20.12.2019
Bösch & Edthofer AG (CHE-103.349.066), per 17.08.2023
Ernst & Young AG (CHE-101.392.967), per 11.11.2003
Fiduciaire de gestion et d'informatique S.A. (CHE-102.664.306), per 31.05.2005
Fiduciaire Jacques Ceriani SA (CHE-101.822.086), per 08.04.2005
GBR Ernst & Young AG (CHE-100.918.105), per 05.03.2002
Hangartner Treuhand AG (CHE-100.067.795), per 19.11.2002
Neofidaria AG (ADM-169.740.521), per 09.08.2001
Treuhand- und Revisionsgesellschaft T + R Grischa AG (CHE-101.715.639), per 19.06.2001
Verifica SA (CHE-100.818.159), per 11.05.2005
FAOA Information
FAOA ID 500646
RAB Permission state-regulated audit firm
FAOA License active (since 28.11.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (9) Ernst & Young AG (CHE-461.581.835) in Aarau (AG)  
Ernst & Young AG (CHE-441.858.784) in Bern (BE)
Ernst & Young SA (CHE-186.791.979) in Lancy (GE)
Ernst & Young AG (CHE-475.755.395) in Lugano (TI)
Ernst & Young AG (CHE-259.230.495) in Luzern (LU)
Ernst & Young SA (CHE-294.400.879) in Renens (VD) (VD)
Ernst & Young AG (CHE-327.393.030) in St. Gallen (SG)
Ernst & Young AG (CHE-152.377.547) in Zug (ZG)
Ernst & Young AG (CHE-491.907.686) in Zürich (ZH)
Ernst & Young AG (CHE-311.498.829) in Baden (AG)
Ernst & Young AG (CHE-354.720.232) in Biel/Bienne (BE)
ATAG Ernst & Young AG (CHE-132.732.622) in Buchs (SG) (SG)
Ernst & Young AG (CHE-421.676.725) in Chur (GR)
Ernst & Young AG (CHE-357.440.711) in Granges-Paccot (FR)
Ernst & Young AG (CHE-367.926.091) in Kreuzlingen (TG)
Ernst & Young SA (CHE-185.564.694) in Neuchâtel (NE)
Ernst & Young SA (CHE-264.470.869) in Sion (VS)
Membership in Associations EXPERTsuisse
Number of auditors with permission 265  (11.63 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11.1 years (max.: 36.9 years)

Total number of statutory audit engagements: 3'081 (Ranked #3 in Switzerland)

Change in number of audit engagements: -98 (since 31.12.2024), -110 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 50 (thereof 6 in the SMI, 6 in the SMI Expanded and 28 in the SPI)

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 84 2 7 194 67 102 56 230 3 10 3 55 16 21 4 65 15 37 31 45 107 1 244 31 194 509 2'133
Limited liability company 14     10 7 17 4 34   1 1 12 6 1 1 6 19 5 4   12   35 2 64 54 309
Foundation 11 1   58 13 30 3 27 1 3 1 8 3 1   8   6 6 2 15 1 21 3 16 92 330
Cooperative 21 1 2 25 8 2 9 5 1 8 5 17 3 1 1 32 1 13 4 14 16 2 15 17 6 20 249
Association       7   1   3       2             1   1   6     14 35
Special legal forms       3   4 1 3 1 1   1                     3 1   7 25
∑ 130 4 9 297 95 156 73 302 6 23 10 95 28 24 6 111 35 61 46 61 151 4 324 54 280 696 3'081

This audit firm is recorded as statutory auditor for 3711 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 3'081 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 ∑
Aarau 30     2   1       1   2     1   3 5             3 6 54
Basel 35 2 4 31 82 129 16 78 1 8 8 20 5 2 1 38 4 22 15 16 22 3 105 27 25 86 785
Bern 6     218   3 18   1   1 9 2 12   3   17   2 1 1 12   7 27 340
Lancy 1     5   4 8 176       2 7         4         44 2 7 12 272
Lugano               2   3   1 2 2             115       1 5 131
Luzern 3     3   2           21   3 3     1             3   39
Renens (VD)       12   2 24 29         8               6   139 20 6 3 249
St. Gallen 6   4 1 3     3   2 1 1 1     41 1   1 9 1   4 1 4 9 93
Zug 3     1 1 1   1   1   7   2     4   2 1 4       58 8 94
Zürich 46 2 1 24 9 14 7 13 4 8   32 3 3 1 29 23 12 28 33 2   20 4 166 540 1'024
∑ 130 4 9 297 95 156 73 302 6 23 10 95 28 24 6 111 35 61 46 61 151 4 324 54 280 696 3'081

Show client list for Aarau, Basel, Bern, Lancy, Lugano, Luzern, Renens (VD), St. Gallen, Zug, Zürich.

Related audit firms

Network:

Total number of audit engagements across the network: 3'087

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
Psychiatrische Dienste Aargau AG CHE-110.316.103 Windisch 06.11.2025 Auditor switch Aarau
The Hashgraph Group AG CHE-192.631.249 Freienbach 30.10.2025 First auditor Basel
dormakaba Holding AG CHE-107.791.082 Rümlang 28.10.2025 Auditor switch Zürich
Fédération Internationale de Hockey CHE-101.670.161 Lausanne 24.10.2025 First auditor Renens (VD)
hoco familienholding ag CHE-243.531.324 Sursee 23.10.2025 Auditor switch Luzern
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
Augenarzt-Praxisgemeinschaft Gutblick AG CHE-488.671.537 Freienbach 05.11.2025 Auditor switch Zürich
BOSSON ET PILLET SA CHE-102.048.768 Lancy 05.11.2025 Auditor switch Renens (VD)
VITASANA Baugenossenschaft CHE-101.098.137 Zürich 04.11.2025 Auditor switch Zürich
Advontes AG CHE-185.180.483 Freienbach 03.11.2025 Auditor switch Zürich
Bostik Schweiz AG CHE-106.953.146 Arbon 03.11.2025 Auditor switch Zürich