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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  (8.98 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 7.9 years (max.: 33.9 years)

Total number of statutory audit clients: 1'122 (Ranked #6 in Switzerland)

Change in number of audit engagements: -14 (since 31.12.2025), +16 (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 22 35 23 50 31 115 3 4 17 9 2 10 6 13 17 15 55 9 75 8 137 196 852
Limited liability company 11 4 4 6   19   1 9 9   3 16 3 2 1 1   20 1 36 43 189
Foundation   2   5   29     5 1 1 1 2   1 1 3   4 1 3 9 68
Cooperative       1                                     1
Association       1   2                         3       6
Special legal forms   1       4                           1     6
∑ 33 42 27 63 31 169 3 5 31 19 3 14 24 16 20 17 59 9 102 11 176 248 1'122

This audit firm is recorded as statutory auditor for 1260 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 1'122 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 3 3 8 19                 1   3           10 3 50
Genève       3 4 154     2 4   4     1       39 3 11 7 232
Lausanne   1   2 5 2       8                 52 2 2 3 77
Lugano 1             1 1         1     56   1   4 2 67
Zürich 29 38 19 39 22 13 3 4 28 7 3 10 23 15 16 17 3 9 10 6 149 233 696
∑ 33 42 27 63 31 169 3 5 31 19 3 14 24 16 20 17 59 9 102 11 176 248 1'122

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
BP Elektro AG CHE-161.546.872 Dietikon 11.06.2026 Auditor switch Zürich
Jörg G. Bucherer-Stiftung CHE-152.277.822 Meggen 11.06.2026 Auditor switch Zürich
Kuwait Petroleum Aviation (Switzerland) Ltd CHE-109.310.565 Zürich 03.06.2026 Auditor switch Zürich
Vigier Management AG CHE-108.326.546 Lyss 29.05.2026 Auditor switch Zürich
Vigier Holding AG CHE-108.326.256 Flumenthal 28.05.2026 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
RATIONAL International AG CHE-112.499.138 Balgach 15.06.2026 Auditor switch Zürich
Kuoni Reisen Beteiligungs AG in Liquidation CHE-444.146.295 Zürich 04.06.2026 Opting-out Zürich
Regimo St. Gallen AG CHE-106.359.977 St. Gallen 02.06.2026 Auditor switch Zürich
Coutts & Co AG CHE-105.841.220 Zürich 27.05.2026 Auditor switch Zürich
Glow IPCo Sagl CHE-456.017.291 Bioggio 21.05.2026 Auditor switch Lugano