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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 285  (10.81 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11 years (max.: 36.6 years)

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

Change in number of audit engagements: -98 (since 31.12.2024), -145 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 49 (thereof 7 in the SMI, 7 in the SMI Expanded and 25 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 79 2 8 196 71 101 59 232 3 11 4 50 17 17 4 57 19 37 33 47 112 1 250 32 191 500 2'133
Limited liability company 14     9 8 17 5 32   1 1 9 7 1 1 6 16 5 5   12   35 2 64 53 303
Foundation 12 1   61 13 30 3 27 1 3 1 8 3 1   8   6 6 2 15 1 21 3 17 91 334
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 21 250
Association       8   1   3       2             1   1   6     14 36
Special legal forms       3   5 1 3 1 1   1                     3 1   6 25
∑ 126 4 10 302 100 156 77 302 6 24 11 87 30 20 6 103 36 61 49 63 156 4 330 55 278 685 3'081

This audit firm is recorded as statutory auditor for 3694 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 27     2 4 1       1   1     1   3 5             3 6 54
Basel 35 2 4 32 83 127 16 76 1 8 9 21 5 2 1 38 4 22 15 16 22 3 105 26 24 87 784
Bern 6     222   6 19   1   1 9 2 12   3   17   2 2 1 12   7 29 351
Lancy 1     5   4 9 177       2 7         4         43 2 7 12 273
Lugano               2   3   1 2 1             119       1 5 134
Luzern 3     2   2           18     3                   3   31
Renens (VD)       12   2 27 31         10               6   147 22 6 4 267
St. Gallen 6   4 1 3     3   4 1   1     41 1   1 9 1   4 1 3 11 95
Zug 3     1 1     1   1   7   2     4   2 1 5       56 7 91
Zürich 45 2 2 25 9 14 6 12 4 7   28 3 3 1 21 24 13 31 35 1   19 4 168 524 1'001
∑ 126 4 10 302 100 156 77 302 6 24 11 87 30 20 6 103 36 61 49 63 156 4 330 55 278 685 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
Intercity Immobilien AG CHE-263.852.501 Zürich 11.07.2025 First auditor Zürich
Basilea Pharmaceutica International AG, Allschwil CHE-114.147.271 Allschwil 09.07.2025 Auditor switch Basel
Luware AG CHE-115.547.880 Zürich 09.07.2025 Auditor switch Zürich
Luware Holding AG CHE-468.799.996 Zürich 09.07.2025 Auditor switch Zürich
Luware Licensing AG CHE-157.111.198 Zürich 09.07.2025 Auditor switch 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
Personalvorsorgestiftung La Prairie Group CHE-109.724.866 Volketswil 14.07.2025 Auditor switch Bern
Kisling AG CHE-102.512.978 Wetzikon (ZH) 11.07.2025 Auditor switch Zug
TUNAP AG CHE-105.447.260 Märstetten 11.07.2025 Auditor switch St. Gallen
Prayon Switzerland SA CHE-101.522.804 Bex 10.07.2025 Auditor switch Renens (VD)
Camper & Nicholsons International Limited CHE-109.351.618 Genève 08.07.2025 Auditor switch Basel