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The ten biggest Swiss audit firms (in terms of statutory audit clients)

# Audit Firm Number of Audit Engagements Average engagement duration Number of auditors with permission
1 BDO AG 6'220 9.78 295
2 PricewaterhouseCoopers AG 5'377 11.58 303
3 Ernst & Young AG 3'340 10.56 296
4 KPMG AG 2'911 9.47 331
5 OBT AG 1'248 10.73 42
6 Deloitte AG 1'099 7.77 114
7 Fiduciaire FIDAG SA 826 11.66 23
8 Berney Associés Audit SA 777 9.13 21
9 Balmer-Etienne AG 762 9.94 27
10 MAZARS SA 682 4.43 66

Evolution of licensed audit firms

auditorstats.ch - data source: FAOA register (own analysis).

Recently accredited audit firms

Date Audit Firm   License FAOA ID
26.01.2024 AROS Treuhand AG Schaffhausen (SH) Revisionsexperte/in 505493
17.01.2024 conrevis Treuhand GmbH Jegenstorf (BE) Revisionsexperte/in 505494
07.12.2023 MOORE STEPHENS EXPERT (ZURICH) AG Zürich (ZH) Revisionsexperte/in 505046
04.12.2023 conversa.gr treuhand ag Tujetsch (GR) Revisor/in 504760
30.11.2023 Revisa GmbH Münchwilen (TG) Revisor/in 505490
20.11.2023 HS Hubert Steffen Consulting Binningen (BL) Revisor/in 505278
17.11.2023 Catrina Consult Treuhand + Unternehmensberatung KMU Chur (GR) Revisionsexperte/in 503731
16.11.2023 Treuhandbüro Hälg AG Gossau (SG) Revisionsexperte/in 503592
15.11.2023 2-Consult Audit AG Schwellbrunn (AR) Revisionsexperte/in 505489
30.10.2023 Franco-Suisse Advice, Archamps, succursale de Plan-les-Ouates Plan-les-Ouates (GE) Revisionsexperte/in 505462

Auditor mergers and takeovers

Date Acquirer   Acquiree  
22.01.2024 Aeberli Treuhand AG Zürich (ZH) Revex, Treuhand AG Zürich Zürich (ZH)
18.12.2023 KPMG AG Zürich (ZH) Fides Revision AG Zürich (ZH)
11.12.2023 Berater & Partner AG Luzern (LU) Handels- und Gewerbe - Treuhand AG Oberkulm (AG)
06.12.2023 Avanta Audit AG Baar (ZG) AVANTA AUDIT ZURICH AG Zürich (ZH)
30.10.2023 wichert-treuhand ag Lachen (SZ) Wichert Treuhand & Finanzcontrolling Lachen (SZ)
17.08.2023 Ernst & Young AG Basel (BS) Bösch & Edthofer AG Herisau (AR)
14.07.2023 accoswiss ag Zürich (ZH) Accoswiss AG Zürich (ZH)
27.06.2023 KMU Revipartner AG Jegenstorf (BE) CONSVAL REVISIONEN GMBH Thun (BE)
23.06.2023 Dürst Treuhand AG Rüti (ZH) ZIT Ziegler Immobilien & Treuhand GmbH Rüti (ZH)
23.06.2023 Dürst Treuhand AG Rüti (ZH) GST Treuhand AG Pfäffikon (ZH)