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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-464.088.838) in Porrentruy (JU)
BDO SA (CHE-309.054.162) 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
SVIR
Number of auditors with permission 317  (20.73 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.3 years (max.: 33.3 years)

Total number of statutory audit engagements: 6'572 (Ranked #1 in Switzerland)

Change in number of audit engagements: +269 (since 31.12.2024), +266 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 18 (thereof 0 in the SMI, 1 in the SMI Expanded and 13 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 545 7 9 495 160 134 135 193 20 60 31 315 42 53 80 125 25 287 116 72 125 49 264 119 271 819 4'551
Limited liability company 23     28 9 11 13 14 4 8 5 12 6 1 3 16 2 23 6 2 7 2 8 18 29 76 326
Foundation 123   10 131 35 87 13 32 7 16 11 80 1 15 20 38 4 85 15 13 30 11 56 21 36 266 1'156
Cooperative 25   1 34 10 6 8   1 6   24 1 1 1 3   12 4 6 4 3 7 2 3 87 249
Association 28     45 10 13 1 6   2   21     1 3   14 1   3   14 4 10 60 236
Special legal forms 2 1 1 5 1 2 5 1 2 1   3   1   5 1 5   2 5   6 1   4 54
∑ 746 8 21 738 225 253 175 246 34 93 47 455 50 71 105 190 32 426 142 95 174 65 355 165 349 1'312 6'572

This audit firm is recorded as statutory auditor for 2609 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'572 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 447     13 11 13   1   5   18   1   3   27 3 3   1 1   15 62 624
Affoltern am Albis 5       1                                       3 22 31
Altdorf (UR) 1                 2   2             15     51     3   74
Baden 113     10 1 1       1   7     2     4 2       2 1 4 26 174
Basel 15 1   10 84 181     1 1 1 4   1 3     11     2 2 1   2 26 346
Bern 18     319 2 4 15 4 2 7 1 12 5 1   1 2 11 5 7 1 2 10 16 8 31 484
Biel/Bienne 4     71 2 4 1 1     1   3         7         6     10 110
Burgdorf 2     68     1         1           9             1 2 84
Chur                 1 40           1       3             45
Delémont                     15   4                           19
Epalinges       1     9 18     6   18         1 1       205 14 2   275
Frauenfeld                               1       15         1 4 21
Glarus     1 1         19             8     1             8 38
Grenchen       31 1 2 1               1 1   76     1   1   3 7 125
Herisau   1 3                         1                   2 7
Lachen 12   1   3 3   1 3 4   2 1   1 17 1   54 2   1 1 1 5 34 147
Lamone               4   5   2                 158   1   1 4 175
Langenthal       78                           3                 81
Laufen         14                         14                 28
Liestal 7     3 86 24         2 6   1       7 1       3   1 5 146
Luzern 9     13 1         7   263   14 24 4   1 9   3 3   4 37 43 435
Monthey                                             3 8     11
Muri (AG) 2                                                   2
Nyon               3                             31       34
Olten 11     10 1   1       1 1           57             5   87
Porrentruy                     14                               14
Porrentruy               1                                     1
Sarnen 1                     4   1 47                       53
Schaffhausen                                 5   1 1           2 9
Sion       1     1 4                             3 113 2   124
Solothurn 6     53 1 1 2         3 3   3 1   192     1   1   3 15 285
St. Gallen 3 4 16 1 1       2 5           119 10   2 49     1   5 19 237
Stans 2     2               6 1 46 8 1           4     1 1 72
Steinhausen 3     15 1         2   12 1   1 3   1 2           138 22 201
Sursee 11     5     1   2     92   3 3 1       1     1   6 6 132
Vernier       1     6 197         6 1             3   56 2 5 7 284
Villars-sur-Glâne       4     135 2         7                   17 4 2 4 175
Wetzikon (ZH) 1 1   1         1 1   2     1 4 3   4 3     2   6 175 205
Winterthur                                                   1 1
Zofingen 31                                 2             1   34
Zürich 42 1   27 15 20 2 10 3 13 6 18 1 2 11 24 11 3 42 11 5 1 9 2 89 774 1'142
∑ 746 8 21 738 225 253 175 246 34 93 47 455 50 71 105 190 32 426 142 95 174 65 355 165 349 1'312 6'572

Show client list for Aarau, Affoltern am Albis, Altdorf (UR), Baden, Basel, Bern, Biel/Bienne, Burgdorf, Chur, Delémont, Epalinges, Frauenfeld, Glarus, Grenchen, Herisau, Lachen, Lamone, Langenthal, Laufen, Liestal, Luzern, Monthey, Muri (AG), Nyon, Olten, Porrentruy, 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: 6'573

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
Altersheimverein Sarmenstorf CHE-108.921.335 Sarmenstorf 09.12.2025 First auditor Aarau
Braut- und Festmode chez Janine AG CHE-102.870.751 Bubikon 09.12.2025 Auditor switch Wetzikon (ZH)
Confidentia Beteiligungen AG CHE-116.054.172 Zug 09.12.2025 Auditor switch Wetzikon (ZH)
Spaini Bau AG-Wohlfahrtsstiftung in Liquidation CHE-109.733.724 Basel 09.12.2025 Auditor switch Basel
WEMACO Invest AG CHE-113.773.862 Zug 09.12.2025 Auditor switch Wetzikon (ZH)
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
GREENREB AG CHE-189.668.720 Küsnacht (ZH) 09.12.2025 Auditor switch Aarau
GREENREB Holding AG CHE-378.829.799 Küsnacht (ZH) 09.12.2025 Auditor switch Aarau
Hotel Restaurant Vogelsang AG CHE-102.292.452 Eich 08.12.2025 Auditor switch Sursee
Pharmaworld AG CHE-373.414.095 Zürich 04.12.2025 Auditor switch Zürich
AtonRâ Partners SA CHE-105.225.914 Genève 02.12.2025 Auditor switch Vernier