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Fact Sheet Deloitte AG

Core Company Information
Company Name Deloitte AG
UID CHE-101.377.666
Alternative / previous Names Deloitte SA, Deloitte Ltd
DELOITTE & TOUCHE AG, DELOITTE & TOUCHE SA, DELOITTE & TOUCHE LTD
Deloitte & Touche Experta AG, Deloitte & Touche Experta SA
Experta Revision AG, Experta Revision SA, Experta Revisione SA, Experta Audit Ltd
Domicile Zürich
Canton ZH
Legal Form Limited corporation
Inscription Date 19.01.1984
Website http://www.deloitte.ch
FAOA Information
FAOA ID 500420
RAB Permission state-regulated audit firm
FAOA License active (since 29.11.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (5) Deloitte AG (CHE-156.952.551) in Basel (BS)  
Deloitte AG (CHE-437.674.867) in Bern (BE)
Deloitte SA (CHE-411.931.790) in Genève (GE)
Deloitte SA (CHE-281.829.115) in Lausanne (VD)
Deloitte AG (CHE-193.020.143) in Lugano (TI)
DELOITTE & TOUCHE AG (CHE-394.391.123) in Bern (BE)
DELOITTE & TOUCHE AG (CHE-348.251.660) in Zug (ZG)
Membership in Associations EXPERTsuisse
Number of auditors with permission 125  (9.06 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 7.8 years (max.: 33.7 years)

Total number of statutory audit clients: 1'133 (Ranked #6 in Switzerland)

Change in number of audit engagements: -3 (since 31.12.2025), +23 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 16 (thereof 1 in the SMI, 1 in the SMI Expanded and 9 in the SPI)

Details regarding the distribution of the audit engagements across legal forms and cantons are depicted in the table below.

  AG BE BL BS FR GE GL GR LU NE NW SG SH SO SZ TG TI UR VD VS ZG ZH ∑
Limited corporation 21 35 23 52 31 113 3 4 18 9 2 12 6 14 18 15 54 9 76 9 139 196 859
Limited liability company 11 4 4 6   18   1 9 9   3 20 3 2 1 2   20 1 36 43 193
Foundation   1   5   30     4 1 1 1 2   1 1 3   4 1 3 9 67
Cooperative       1                                     1
Association       1   2                         3       6
Special legal forms   1       4                           1   1 7
∑ 32 41 27 65 31 167 3 5 31 19 3 16 28 17 21 17 59 9 103 12 178 249 1'133

This audit firm is recorded as statutory auditor for 1245 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 1'133 statutory audits are performed by the branch offices as indicated in the table below.

  AG BE BL BS FR GE GL GR LU NE NW SG SH SO SZ TG TI UR VD VS ZG ZH ∑
Basel 2 3 8 19                 1   3           10 3 49
Genève       3 4 152     2 4   4     1       39 4 10 8 231
Lausanne   1   2 5 2       8                 52 2 2 3 77
Lugano 1             1 1         1     57   1   4 2 68
Zürich 29 37 19 41 22 13 3 4 28 7 3 12 27 16 17 17 2 9 11 6 152 233 708
∑ 32 41 27 65 31 167 3 5 31 19 3 16 28 17 21 17 59 9 103 12 178 249 1'133

Show client list for Basel, Genève, Lausanne, Lugano, Zürich.

Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
Olinn Suisse Sàrl CHE-106.102.332 Genève 16.04.2026 First auditor Genève
5 ATLANTIS AG CHE-492.789.515 Zürich 14.04.2026 Auditor switch Zürich
Andermatt Hospitality Management AG CHE-440.610.419 Andermatt 13.04.2026 First auditor Zürich
Vaxcyte Switzerland GmbH CHE-175.563.693 Baar 02.04.2026 First auditor Genève
Rey Medical SA CHE-109.884.731 Plan-les-Ouates 31.03.2026 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
Banca Popolare di Sondrio (Suisse) SA CHE-106.128.449 Lugano 07.04.2026 Auditor switch Lugano
Montana Capital Partners AG CHE-223.508.210 Baar 11.03.2026 Auditor switch Zürich
Ayvens Switzerland AG CHE-111.795.700 Zürich 24.02.2026 Auditor switch Genève
Brembo Reinsurance AG CHE-493.784.532 Zürich 24.02.2026 Auditor switch Zürich
argenx Switzerland SA CHE-192.432.916 Vernier 23.02.2026 Auditor switch Zürich