Get detailed statistics about any audit firm in Switzerland. Just type the auditor name in the field below and off you go!
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 | 6'374 | 10.13 | 296 |
| 2 | PricewaterhouseCoopers AG | 5'233 | 11.81 | 303 |
| 3 | Ernst & Young AG | 3'167 | 11.05 | 296 |
| 4 | KPMG AG | 2'805 | 9.90 | 325 |
| 5 | OBT AG | 1'276 | 10.92 | 48 |
| 6 | Deloitte AG | 1'110 | 7.72 | 118 |
| 7 | Fiduciaire FIDAG SA | 849 | 11.85 | 22 |
| 8 | Berney Associés Audit SA | 816 | 9.72 | 23 |
| 9 | Balmer-Etienne AG | 780 | 10.36 | 29 |
| 10 | FORVIS MAZARS SA | 729 | 4.83 | 61 |
Evolution of licensed audit firms
auditorstats.ch - data source: FAOA register (own analysis).
Recently accredited audit firms
| Date | Audit Firm | License | FAOA ID | |
|---|---|---|---|---|
| 19.03.2025 | Fiduciaire des Alpes Vétroz SA | Vétroz (VS) | Revisor/in | 505536 |
| 25.02.2025 | Treuhand Laufen GmbH | Laufen (BL) | Revisionsexperte/in | 505546 |
| 20.02.2025 | DM Revision GmbH | Baar (ZG) | Revisionsexperte/in | 505545 |
| 20.02.2025 | Rigolet Fiduciaire SA | Monthey (VS) | Revisor/in | 505543 |
| 20.02.2025 | Veritas Treuhand AG | Münchwilen (TG) | Revisor/in | 505537 |
| 12.02.2025 | Strässle Unternehmensberatung GmbH | Arbon (TG) | Revisionsexperte/in | 505499 |
| 05.02.2025 | Nexio Fiduciaire SA | La Tour-de-Peilz (VD) | Revisionsexperte/in | 505544 |
| 22.01.2025 | Fidlex SA | Genève (GE) | Revisionsexperte/in | 505541 |
| 23.12.2024 | Alasco Treuhand GmbH | Zürich (ZH) | Revisionsexperte/in | 505538 |
| 20.12.2024 | Zumstein Treuhand- & Revisions AG | Zürich (ZH) | Revisor/in | 501668 |
Auditor mergers and takeovers
| Date | Acquirer | Acquiree | ||
|---|---|---|---|---|
| 10.04.2025 | Loepthien Maeder Treuhand AG | Ittigen (BE) | Loepthien AG | Ittigen (BE) |
| 24.03.2025 | KMU Treuhand und Revisions AG | Schübelbach (SZ) | UV-Treuhand & Partner AG | Wil (SG) |
| 19.03.2025 | steffen rausch kessler ag | Frauenfeld (TG) | steffen rausch kessler ag weinfelden | Weinfelden (TG) |
| 07.03.2025 | Grant Thornton AG | Zürich (ZH) | GwG Prüfung und Beratung AG | Basel (BS) |
| 11.12.2024 | ECOVIS Intercontrol AG | Zürich (ZH) | ECOVIS ws&p wirtschaftsprüfung ag | Zürich (ZH) |
| 06.12.2024 | Interfida SA | Chiasso (TI) | Masfida SA | Chiasso (TI) |
| 27.11.2024 | DS Fiduciaire, Duc et Fils SA | Sierre (VS) | Duc, Sarrasin & Cie SA | Martigny (VS) |
| 07.11.2024 | Lenz Treuhand AG | Zürich (ZH) | Frauenknecht Treuhand GmbH | Zürich (ZH) |
| 25.10.2024 | adiutis ag | Burgdorf (BE) | auditpartner ag | Bern (BE) |
| 24.09.2024 | ATTEST audit & consulting SA | Lugano (TI) | Udo Schiller Consulting | Lugano (TI) |