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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 SA (CHE-294.400.879) in Lausanne (VD)
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-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  (10.72 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11 years (max.: 36.2 years)

Total number of statutory audit engagements: 3'174 (Ranked #3 in Switzerland)

Change in number of audit engagements: -6 (since 31.12.2024), -174 (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 8 210 72 101 62 257 3 14 5 49 21 18 4 59 19 40 31 51 111 1 268 33 193 494 2'202
Limited liability company 14     9 8 19 5 33   1 1 9 8   1 7 16 6 6 1 11   38 2 63 53 311
Foundation 11 1   64 13 31 3 28 1 2 1 8 3 1   8   6 6 4 16 1 23 3 19 93 346
Cooperative 23 1 2 26 8 2 10 5 1 8 5 17 2 1 1 32 1 13 4 14 17 2 15 18 6 21 255
Association       9   1   4       2                 1   6     13 36
Special legal forms       3   5 1 3 1 1                         3 1   6 24
124 4 10 321 101 159 81 330 6 26 12 85 34 20 6 106 36 65 47 70 156 4 353 57 281 680 3'174

This audit firm is recorded as statutory auditor for 3617 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 3'174 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 84 128 17 97 1 8 9 21 5 1 1 39 4 22 11 16 23 3 107 27 24 88 813
Bern 6     233   6 21   1   1 9 5 12   3   20   2 2 1 12   7 30 371
Lancy       5 1 4 9 179       2 7         5         42 2 6 13 275
Lausanne       14   2 28 33         12               8   169 23 7 4 300
Lugano               2   3   1 1 2             116       1 6 132
Luzern 3     2   2           16     3                   3   29
St. Gallen 6   4 1 3     3   6 1   1     43 1   1 12 1   4 1 3 12 103
Zug 3     1 1     1   1   7   2     5   2 1 5       58 10 97
Zürich 44 2 2 28 8 16 6 15 4 7 1 28 3 3 1 21 23 13 33 39 1   19 4 169 511 1'001
124 4 10 321 101 159 81 330 6 26 12 85 34 20 6 106 36 65 47 70 156 4 353 57 281 680 3'174

Show client list for Aarau, Basel, Bern, Lancy, Lausanne, Lugano, Luzern, St. Gallen, Zug, Zürich.

Related audit firms

Network:

Total number of audit engagements across the network: 3'180

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
Serac Biosciences AG CHE-149.769.467 Basel 11.02.2025 First auditor Basel
B.F.G. Bétonfrais Grandson S.A. CHE-107.971.684 Grandson 05.02.2025 Auditor switch Lausanne
Sables et graviers La Poissine S.A. CHE-107.871.864 Grandson 05.02.2025 Auditor switch Lausanne
SI Cand-Landi SA CHE-108.076.898 Grandson 05.02.2025 Auditor switch Lausanne
Perennial SA CHE-113.072.765 Préverenges 04.02.2025 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
Wärme Mittelland AG CHE-269.424.948 Solothurn 17.02.2025 Auditor switch Bern
Kraftwerk Sanetsch AG (KWS) CHE-105.798.044 Gsteig 14.02.2025 Auditor switch Bern
SCHOTT Suisse SA CHE-239.893.847 Yverdon-les-Bains 13.02.2025 Auditor switch St. Gallen
Pensionskasse der Siemens-Gesellschaften in der Schweiz CHE-100.197.587 Zürich 12.02.2025 Auditor switch Zürich
Wohlfahrtsfonds für die Mitarbeiter der Siemens Schweiz AG CHE-109.742.114 Zürich 12.02.2025 Auditor switch Zürich