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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 265  (11.60 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11.1 years (max.: 37 years)

Total number of statutory audit engagements: 3'074 (Ranked #3 in Switzerland)

Change in number of audit engagements: -105 (since 31.12.2024), -104 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 48 (thereof 6 in the SMI, 5 in the SMI Expanded and 27 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 5 7 193 66 101 58 230 3 9 3 56 16 21 4 64 15 39 30 48 107 1 237 27 196 507 2'127
Limited liability company 14     10 8 19 4 34   1 1 12 6 1 1 6 19 5 4   11   36 2 64 55 313
Foundation 11 1   57 13 30 3 26 1 3 1 8 3 1   8   6 6 1 15 1 21 3 16 92 327
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 19 248
Association       8   1   3       2             1   1   5     13 34
Special legal forms       3   4 1 3 1 1   1                     3 1   7 25
∑ 130 7 9 296 95 157 75 301 6 22 10 96 28 24 6 110 35 63 45 63 150 4 317 50 282 693 3'074

This audit firm is recorded as statutory auditor for 3716 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 3'074 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         1       1   2     1   3 7             3 5 53
Basel 35 2 4 30 82 130 16 78 1 8 8 21 5 2 1 38 4 22 15 16 22 3 105 27 25 86 786
Bern 6     220   3 18   1   1 9 2 12   3   17   2 1 1 13   7 28 344
Lancy 1     6   4 10 176       2 7         4         45 2 7 12 276
Lugano               2   3   1 2 2             114       1 5 130
Luzern 3     2   2           21   3 3     1             3   38
Renens (VD)       12   2 24 28         8               6   129 16 6 3 234
St. Gallen 6 3 4 1 3     3   1 1 1 1     41 1   1 12 1   4 1 4 9 98
Zug 3     1 1 1   1   1   7   2     4   2 1 4       59 8 95
Zürich 46 2 1 24 9 14 7 13 4 8   32 3 3 1 28 23 12 27 32 2   21 4 167 537 1'020
∑ 130 7 9 296 95 157 75 301 6 22 10 96 28 24 6 110 35 63 45 63 150 4 317 50 282 693 3'074

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: 3'080

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
Alroumi Properties Schweiz AG CHE-473.843.172 Däniken 11.12.2025 First auditor Aarau
NIRU (SWISS) SA CHE-114.587.641 Plan-les-Ouates 11.12.2025 Auditor switch Lancy
ULTIMA QUAI WILSON Sàrl CHE-430.717.955 Genève 11.12.2025 First auditor Lancy
ARROW PROPERTY HOLDING SA CHE-394.823.246 Fribourg 10.12.2025 Auditor switch Lancy
Chesery AG Gstaad CHE-100.726.534 Saanen 10.12.2025 Auditor switch Lancy
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
Love Ride Switzerland CHE-108.840.553 Erlenbach (ZH) 09.12.2025 Discontinued Zürich
Holy Cow ! Gourmet Burger Company SA CHE-114.699.895 Lausanne 08.12.2025 Auditor switch Renens (VD)
Gleis-Genossenschaft Ristet-Bergermoos CHE-100.333.577 Birmensdorf (ZH) 05.12.2025 Auditor switch Zürich
Ingenus Pharmaceuticals GmbH CHE-111.955.978 Lugano 04.12.2025 Auditor switch Lugano
Personalfürsorgestiftung der Firma Roth & Cie AG CHE-110.262.677 Wangen an der Aare 03.12.2025 Auditor switch Aarau