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Fact Sheet BDO AG

Core Company Information
Company Name BDO AG
UID CHE-105.952.747
Alternative / previous Names BDO SA, BDO Ltd
BDO Visura
Visura Treuhand-Gesellschaft, Visura Société Fiduciaire, Visura Società Fiduciaria, Visura Auditing and Fiduciary Company
Domicile Zürich
Canton ZH
Legal Form Limited corporation
Inscription Date 30.12.1932
Website https://www.bdo.ch
Takeovers: accontax Markus Gfeller Treuhand AG (CHE-101.350.360), per 03.06.2025
BDO Sofirom SA (CHE-106.015.064), per 09.07.2013
BDO Visura (Valais) SA (CHE-113.627.261), per 09.07.2013
BDO Visura International AG (CHE-101.311.259), per 29.11.2016
Continental Revision und Treuhand AG in Liquidation (CHE-102.133.983), per 11.12.2020
Dr. Suter Treuhand AG (CHE-106.926.617), per 06.05.2010
Fidirevisa SA (CHE-105.752.734), per 17.12.2015
FSA FIDUCIARIA SVIZZERA DEGLI ALBERGATORI DIVISIONE TICINO SA (CHE-110.366.118), per 09.07.2013
Jörg Moser AG (CHE-108.766.997), per 03.06.2022
LMK Revisions AG (CHE-102.604.764), per 12.07.2021
Wyss + Partner Treuhand AG (CHE-106.214.899), per 29.06.2021
FAOA Information
FAOA ID 500705
RAB Permission state-regulated audit firm
FAOA License active (since 13.12.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (41) BDO AG (CHE-345.012.024) in Aarau (AG)  
BDO AG (CHE-265.966.133) in Affoltern am Albis (ZH)
BDO AG (CHE-426.842.563) in Altdorf (UR) (UR)
BDO AG (CHE-229.255.214) in Baden (AG)
BDO AG (CHE-370.772.724) in Basel (BS)
BDO AG (CHE-430.259.378) in Bern (BE)
BDO AG (CHE-305.494.906) in Biel/Bienne (BE)
BDO SA (CHE-224.514.963) in Bulle (FR)
BDO AG (CHE-414.946.954) in Burgdorf (BE)
BDO AG (CHE-444.757.547) in Chur (GR)
BDO SA (CHE-383.819.803) in Delémont (JU)
BDO SA (CHE-347.141.454) in Epalinges (VD)
BDO AG (CHE-487.865.056) in Frauenfeld (TG)
BDO AG (CHE-314.312.594) in Glarus (GL)
BDO AG (CHE-327.753.565) in Grenchen (SO)
BDO AG (CHE-325.977.510) in Herisau (AR)
BDO AG (CHE-373.972.722) in Lachen (SZ)
BDO AG (CHE-132.773.704) in Lamone (TI)
BDO AG (CHE-408.158.150) in Langenthal (BE)
BDO AG (CHE-320.101.456) in Laufen (BL)
BDO AG (CHE-147.528.510) in Liestal (BL)
BDO AG (CHE-384.263.558) in Luzern (LU)
BDO SA (CHE-213.009.885) in Monthey (VS)
BDO AG (CHE-218.606.663) in Muri (AG) (AG)
BDO SA (CHE-412.010.941) in Nyon (VD)
BDO AG (CHE-303.222.254) in Olten (SO)
BDO AG (CHE-135.926.789) in Sarnen (OW)
BDO AG (CHE-161.247.777) in Schaffhausen (SH)
BDO AG (CHE-210.965.785) in Schwyz (SZ)
BDO SA (CHE-278.511.546) in Sion (VS)
BDO AG (CHE-389.731.986) in Solothurn (SO)
BDO AG (CHE-386.245.531) in St. Gallen (SG)
BDO AG (CHE-457.315.785) in Stans (NW)
BDO AG (CHE-384.985.628) in Steinhausen (ZG)
BDO AG (CHE-295.361.041) in Sursee (LU)
BDO AG (CHE-154.513.531) in Uster (ZH)
BDO SA (CHE-398.161.059) in Vernier (GE)
BDO SA (CHE-320.207.362) in Villars-sur-Glâne (FR)
BDO AG (CHE-345.180.503) in Wetzikon (ZH) (ZH)
BDO AG (CHE-392.959.099) in Winterthur (ZH)
BDO AG (CHE-313.962.401) in Zofingen (AG)
BDO AG (CHE-367.201.384) in Arosa (GR)
BDO SA (CHE-208.015.259) in Delémont (JU)
BDO Visura (CHE-313.641.055) in Delémont (JU)
BDO Visura (CHE-421.671.283) in Egerkingen (SO)
Visura Société Fiduciaire (CHE-999.000.112) in Fribourg (FR)
BDO AG (CHE-367.593.836) in Kreuzlingen (TG)
BDO Visura (CHE-325.058.313) in Nyon (VD)
BDO Visura (ADM-212.658.265) in Oensingen (SO)
BDO Visura (ADM-278.574.216) in Olten (SO)
BDO SA (CHE-309.054.162) in Porrentruy (JU)
BDO SA (CHE-464.088.838) in Porrentruy (JU)
BDO AG (CHE-329.959.698) in Rüte (AI)
BDO AG (CHE-363.697.773) in Wil (SG) (SG)
BDO Visura (CHE-316.539.499) in Zürich (ZH)
Membership in Associations EXPERTsuisse
IIAS
Number of auditors with permission 336  (19.83 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.7 years (max.: 34.1 years)

Total number of statutory audit clients: 6'664 (Ranked #1 in Switzerland)

Change in number of audit engagements: +66 (since 31.12.2025), +229 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 19 (thereof 0 in the SMI, 1 in the SMI Expanded and 12 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 541 8 9 490 163 133 138 202 19 63 30 317 39 53 78 128 25 287 117 74 126 47 273 133 270 832 4'595
Limited liability company 26     28 9 9 12 15 4 8 5 14 7 2 2 17 4 20 8 2 8 2 11 18 28 77 336
Foundation 121   9 132 35 90 15 31 8 17 10 78 1 15 22 42 4 85 16 15 30 11 57 22 35 266 1'167
Cooperative 28   1 34 10 6 8   1 6   24 1 1 1 3   12 4 6 4 2 7 2 3 88 252
Association 32     48 10 12 1 7   4   23     1 3 1 15 1   3   14 4 8 67 254
Special legal forms 4 1 1 5 2 2 5   2 2   3   1 1 5 1 5   2 5   6 2   5 60
∑ 752 9 20 737 229 252 179 255 34 100 45 459 48 72 105 198 35 424 146 99 176 62 368 181 344 1'335 6'664

This audit firm is recorded as statutory auditor for 2712 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'664 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 430     10 10 13   1   5   15   1   5   28 3 3 1 1 1   14 60 601
Affoltern am Albis 6       1                         1             3 23 34
Altdorf (UR) 1                 2   2             15     48     4   72
Baden 125     12 1 1       1   7     2     4 3       1 1 2 28 188
Basel 15 1   8 90 180   1 1 1 1 5   1 3   1 14     2 2 1   2 28 357
Bern 17     321 2 3 15 5 2 7 1 13 5 1   1 2 10 5 8 1 2 10 16 8 39 494
Biel/Bienne 2     68 2 4 1 2     1   4         6   1     6     10 107
Bulle             2                                       2
Burgdorf 2     70     1         1       2   10             1 3 90
Chur                 1 45           1       3             50
Delémont               1     25   4                           30
Epalinges       3     8 17     5   15         1 1       210 14 2 1 277
Frauenfeld                               1       16         1 4 22
Glarus     1 1         19 1           8     1             8 39
Grenchen       32 1 2 1               1 1   75     1   1   3 8 126
Herisau   1 3                         1                   2 7
Lachen 12       3 3   1 3 4   2 1   2 16 1   54 1   1   1 4 33 142
Lamone           1   5   4   3                 155   2   1 3 174
Langenthal       74                           3                 77
Laufen         14                         13     1           28
Liestal 7     2 85 22         1 9   1       7 1       2   1 4 142
Luzern 9     13 1         7   258   15 26 4   1 9   3 3   3 37 44 433
Monthey               1                             4 11     16
Muri (AG) 2                                                   2
Nyon               3                             32       35
Olten 11     9 1   1       1             56             5   84
Porrentruy                     3                               3
Sarnen 1                     4   1 46                       52
Schaffhausen                                 6   1 2           3 12
Sion       1     1 4                             3 125 3   137
Solothurn 7     53 1 1 2       1 3 4   3 2   187     1   1   3 15 284
St. Gallen 3 5 16 2         2 5           124 10   2 51         5 19 244
Stans 2     2               6 1 46 5 1           4     1 1 69
Steinhausen 3     15 1 1       2   12 1   1 2   1 1           142 21 203
Sursee 10     5     1   2     94   2 3 1     1 2     1   4 5 131
Vernier       1   1 5 199         5 1             5   62 3 6 5 293
Villars-sur-Glâne       3     139 4         7                   20 4 1 4 182
Wetzikon (ZH)   1   1         1 1   3     1 5 3   4 3     2   1 182 208
Winterthur                                                   4 4
Zofingen 45                                 2             1 1 49
Zürich 42 1   31 16 20 2 11 3 15 6 22 1 3 12 23 12 5 45 9 6 1 9 3 89 777 1'164
∑ 752 9 20 737 229 252 179 255 34 100 45 459 48 72 105 198 35 424 146 99 176 62 368 181 344 1'335 6'664

Show client list for Aarau, Affoltern am Albis, Altdorf (UR), Baden, Basel, Bern, Biel/Bienne, Bulle, Burgdorf, Chur, Delémont, Epalinges, Frauenfeld, Glarus, Grenchen, Herisau, Lachen, Lamone, Langenthal, Laufen, Liestal, Luzern, Monthey, Muri (AG), Nyon, Olten, Porrentruy, Sarnen, Schaffhausen, Sion, Solothurn, St. Gallen, Stans, Steinhausen, Sursee, Vernier, Villars-sur-Glâne, Wetzikon (ZH), Winterthur, Zofingen, Zürich.

Related audit firms

Network:

Total number of audit engagements across the network: 6'665

Direct personal relationship:

Same domicile: 

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
Agriprime Global Commodities GmbH CHE-208.202.258 Zug 11.09.2026 First auditor Vernier
GECAL SA CHE-190.453.304 Val de Bagnes 11.09.2026 Auditor switch Sion
Sette Management AG CHE-457.576.191 Schenkon 11.09.2026 First auditor Sursee
a:primo Verein zur frühen Förderung sozial benachteiligter Kinder CHE-394.731.147 Winterthur 09.09.2026 Auditor switch Winterthur
IFCHOR GALBRAITHS (Suisse) SA CHE-286.587.942 Lausanne 08.09.2026 First auditor Epalinges
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
Macwester Architecture SA CHE-496.851.900 Fribourg 11.09.2026 Discontinued Villars-sur-Glâne
Stiftung Schweizer Plastikausstellung Biel CHE-110.302.928 Biel/Bienne 11.09.2026 Auditor switch Biel/Bienne
Datech AG CHE-107.400.944 Bellach 10.09.2026 Opting-out Grenchen
Event Hotel Letzi Grund AG in Liquidation CHE-115.234.530 Küsnacht (ZH) 10.09.2026 Discontinued Basel
Palais Besenval und Landhaus Event Gastronomie AG in Liquidation CHE-448.240.800 Küsnacht (ZH) 10.09.2026 Discontinued Basel