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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: Neofidaria AG (ADM-169.740.521), per 09.08.2001
Hangartner Treuhand AG (CHE-100.067.795), per 19.11.2002
Verifica SA (CHE-100.818.159), per 11.05.2005
ATAG Allgemeine Treuhand AG (CHE-100.818.892), per 20.12.2019
GBR Ernst & Young AG (CHE-100.918.105), per 05.03.2002
Ernst & Young AG (CHE-101.392.967), per 11.11.2003
Treuhand- und Revisionsgesellschaft T + R Grischa AG (CHE-101.715.639), per 19.06.2001
Fiduciaire Jacques Ceriani SA (CHE-101.822.086), per 08.04.2005
Fiduciaire de gestion et d'informatique S.A. (CHE-102.664.306), per 31.05.2005
Bösch & Edthofer AG (CHE-103.349.066), per 17.08.2023
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-311.498.829) in Baden (AG)
Ernst & Young AG (CHE-441.858.784) in Bern (BE)
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-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-185.564.694) in Neuchâtel (NE)
Ernst & Young SA (CHE-294.400.879) in Renens (VD) (VD)
Ernst & Young SA (CHE-264.470.869) in Sion (VS)
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)
Membership in Associations EXPERTsuisse
Number of auditors with permission 296  (10.70 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11.1 years (max.: 36.3 years)

Total number of statutory audit engagements: 3'167 (Ranked #3 in Switzerland)

Change in number of audit engagements: -12 (since 31.12.2024), -142 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 47 (thereof 5 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 76 2 8 209 73 101 61 255 3 13 5 49 20 17 4 58 19 40 34 51 113 1 264 33 193 500 2'202
Limited liability company 15     9 9 19 5 33   1 1 10 7 1 1 7 16 6 6   12   38 2 63 53 314
Foundation 11 1   60 13 31 3 27 1 3 1 8 3 1   8   6 6 2 15 1 22 3 17 92 335
Cooperative 23 1 2 26 8 2 10 5 1 8 5 17 3 1 1 32 1 13 4 14 17 2 15 18 6 21 256
Association       8   1   3       2             1   1   6     14 36
Special legal forms       3   5 1 3 1 1                         3 1   6 24
∑ 125 4 10 315 103 159 80 326 6 26 12 86 33 20 6 105 36 65 51 67 158 4 348 57 279 686 3'167

This audit firm is recorded as statutory auditor for 3622 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 3'167 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 26     2 4 1       1   1     1   3 5             3 6 53
Basel 36 2 4 35 85 128 17 97 1 8 9 21 5 2 1 39 4 22 15 16 23 3 106 27 24 89 819
Bern 6     227   6 21   1   1 9 5 12   3   20   2 2 1 12   7 30 365
Lancy       5 1 4 9 176       2 7         5         42 2 6 13 272
Lugano               2   3   1 1 1             119       1 5 133
Luzern 3     2   2           17     3                   3   30
Renens (VD)       14   2 27 33         11               7   165 23 7 4 293
St. Gallen 6   4 1 3     3   6 1   1     42 1   1 12 1   4 1 3 11 101
Zug 3     1 1     1   1   7   2     5   2 1 5       57 10 96
Zürich 45 2 2 28 9 16 6 14 4 7 1 28 3 3 1 21 23 13 33 36 1   19 4 168 518 1'005
∑ 125 4 10 315 103 159 80 326 6 26 12 86 33 20 6 105 36 65 51 67 158 4 348 57 279 686 3'167

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: 3'173

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
Teknoxgroup SA CHE-101.787.136 Mendrisio 15.04.2025 Auditor switch Lugano
SIEP Holding AG CHE-474.767.591 Zürich 14.04.2025 Auditor switch Basel
Bächler Feintech AG CHE-103.335.928 Hölstein 11.04.2025 Auditor switch Zürich
Isomorphic Labs Switzerland AG CHE-280.829.348 Zürich 09.04.2025 First auditor Zürich
TECregen AG CHE-442.791.208 Basel 09.04.2025 First auditor Basel
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
Kadervorsorge der SITAG CHE-109.781.166 Arbon 15.04.2025 Auditor switch Zürich
Präventionsstiftung der Kantonalen Gebäudeversicherungen CHE-110.093.995 Bern 15.04.2025 Auditor switch Bern
Cellbrix SA en liquidation CHE-433.187.479 Renens (VD) 08.04.2025 Opting-out Renens (VD)
Pearson Schweiz AG CHE-108.145.068 Cham 28.03.2025 Opting-out Zug
Würth Invest AG CHE-110.350.554 Chur 25.03.2025 Auditor switch Zürich