Tired of renewing your auditor permission?

Get detailed statistics about any audit firm in Switzerland. Just type the auditor name in the field below and off you go!

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  (20.55 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.3 years (max.: 33.2 years)

Total number of statutory audit engagements: 6'514 (Ranked #1 in Switzerland)

Change in number of audit engagements: +210 (since 31.12.2024), +234 (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 530 7 9 491 160 128 135 192 20 59 31 313 42 51 80 124 25 287 115 71 125 49 262 118 266 814 4'504
Limited liability company 23     27 9 11 13 15 4 8 5 13 6 1 3 16 2 23 6 2 7 2 9 18 28 73 324
Foundation 120   10 130 36 85 13 33 7 16 11 80 1 15 20 38 4 85 15 12 30 11 55 21 36 266 1'150
Cooperative 25   1 34 9 6 8   1 6   24 1 1 1 3   12 4 6 4 3 7 2 3 86 247
Association 27     45 9 13 1 6   2   21     1 4   15 1   3   14 4 10 59 235
Special legal forms 2 1 1 5 1 2 5 1 2 1   3   1   5 1 5   2 5   6 1   4 54
∑ 727 8 21 732 224 245 175 247 34 92 47 454 50 69 105 190 32 427 141 93 174 65 353 164 343 1'302 6'514

This audit firm is recorded as statutory auditor for 2602 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'514 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 446     13 12 12   1   5   18   1   3   28 3 3   1 1   15 64 626
Affoltern am Albis 5       1                                       3 22 31
Altdorf (UR) 1                 2   2             13     51     3   72
Baden 113     10 1 1       1   7     2     4 2       2 1 4 27 175
Basel 12 1   10 82 175     1 1 1 4   1 3     12     2 2 1   2 21 331
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         5     10 109
Burgdorf 2     68     1         1           9             1 2 84
Chur                 1 40           1       3             45
Delémont                     11   4                           15
Epalinges       1     9 19     6   18         1 1       208 14 2   279
Frauenfeld                               1       14         1 4 20
Glarus     1 1         19             8     1             9 39
Grenchen       31 1 2 1               1 1   76     1   1   3 6 124
Herisau   1 3                         1                   2 7
Lachen 12   1   3 3   1 3 4   2 1   1 17 1   54 2   1   1 5 34 146
Lamone               4   5   2                 158   1   1 4 175
Langenthal       75                           3                 78
Laufen         13                         14                 27
Liestal 7     3 86 23         2 6   1       7 1       3   1 5 145
Luzern 9     13 1         7   261   14 24 4   1 9   3 3   4 36 43 432
Monthey                                             3 8     11
Muri (AG) 2                                                   2
Nyon               3                             29       32
Olten 11     10 1   1       1 1           56             5   86
Porrentruy                     18                               18
Porrentruy               1                                     1
Sarnen 1                     4   1 47                       53
Schaffhausen                                 5   1 1           2 9
Sion       1     1 4                             3 112 2   123
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 48     1   5 19 236
Stans 2     2               6 1 44 8 1           4     1 1 70
Steinhausen 3     14 1         2   12 1   1 3   1 2           134 22 196
Sursee 11     5     1   2     93   3 3 1       1     1   6 6 133
Vernier       1     7 197         6 1             3   55 2 5 7 284
Villars-sur-Glâne       4     134 2         7                   17 4 2 4 174
Wetzikon (ZH) 2 1   1         1     2     1 4 3   4 3     2   4 168 196
Winterthur                                                   1 1
Zofingen 16                                 2             1   19
Zürich 41 1   25 16 20 2 10 3 13 6 18 1 2 11 24 11 3 43 11 5 1 9 2 90 773 1'141
∑ 727 8 21 732 224 245 175 247 34 92 47 454 50 69 105 190 32 427 141 93 174 65 353 164 343 1'302 6'514

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: 6'515

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
Headz Agency AG CHE-460.327.211 Winterthur 06.11.2025 First auditor Zürich
ING PLUS.ch AG CHE-105.658.526 Winterthur 06.11.2025 Auditor switch Zürich
Sofitex SA CHE-105.501.706 Delémont 06.11.2025 Auditor switch Delémont
Voices CHE-102.511.051 Bern 06.11.2025 First auditor Burgdorf
Cornerhotels AG CHE-232.843.162 Engelberg 05.11.2025 Auditor switch Luzern
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
Fondazione SOS Planet CHE-248.779.794 Bregaglia 06.11.2025 Auditor switch Chur
Gesellschaft für Schweizerische Kunstgeschichte (GSK) CHE-108.017.588 Bern 05.11.2025 Auditor switch Bern
Mutschler Holding AG CHE-113.671.859 Zürich 29.10.2025 Auditor switch Zürich
Sunset Capital SA CHE-223.164.524 Rolle 29.10.2025 Discontinued Epalinges
Crozier Schweiz AG CHE-114.668.908 Kloten 22.10.2025 Auditor switch Vernier