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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 Visura (CHE-313.641.055) in Delémont (JU)
BDO SA (CHE-208.015.259) 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  (19.82 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.6 years (max.: 34 years)

Total number of statutory audit clients: 6'660 (Ranked #1 in Switzerland)

Change in number of audit engagements: +62 (since 31.12.2025), +251 (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 545 8 9 490 163 132 140 203 19 63 30 314 39 52 77 129 25 290 117 72 124 49 272 129 266 839 4'596
Limited liability company 26     28 9 9 12 15 4 8 5 14 7 2 2 17 4 21 8 2 8 2 11 18 27 74 333
Foundation 121   9 132 36 90 15 31 8 17 10 80 1 15 22 42 4 85 17 15 30 11 57 22 35 264 1'169
Cooperative 28   1 34 10 6 8   1 6   24 1 1 1 3   12 4 6 4 3 7 2 3 88 253
Association 32     48 10 12 1 7   4   22     1 3 1 15 1   3   14 4 8 64 250
Special legal forms 4 1 1 5 2 2 5   2 2   3   1   5 1 5   2 5   6 2   5 59
∑ 756 9 20 737 230 251 181 256 34 100 45 457 48 71 103 199 35 428 147 97 174 65 367 177 339 1'334 6'660

This audit firm is recorded as statutory auditor for 2703 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'660 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 433     10 11 13   1   5   15   1   5   28 3 3 1 1 1   14 57 602
Affoltern am Albis 6       1                         1             3 23 34
Altdorf (UR) 1                 2   2             15     51     4   75
Baden 125     12 1 1       1   7     2     4 3       1 1 2 28 188
Basel 15 1   9 89 180   1 1 1 1 5   1 3   1 14     2 2 1   2 30 359
Bern 17     317 2 3 15 5 2 7 1 11 5 1   1 2 11 5 7 1 2 10 16 8 39 488
Biel/Bienne 2     69 2 4 1 2     1   4         6   1     6     10 108
Bulle             2                                       2
Burgdorf 2     71     1         1       2   10             1 3 91
Chur                 1 45           1       3             50
Delémont               1     25   4                           30
Epalinges       3     8 17     5   15         1 1       207 15 2   274
Frauenfeld                               1       16         1 4 22
Glarus     1 1         19 1           8     1             8 39
Grenchen       32 1 2 1               1 1   76     1   1   3 8 127
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                 156   2   1 3 175
Langenthal       74                           3                 77
Laufen         14                         13     1           28
Liestal 7     3 85 22         1 9   1       8 1       2   1 4 144
Luzern 9     13 1         7   259   15 24 4   1 9   3 3   3 37 43 431
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                             3 120 3   132
Solothurn 7     53 1 1 2       1 3 4   3 2   188     1   1   3 15 285
St. Gallen 3 5 16 2 1       2 5           124 10   2 51         5 19 245
Stans 2     2               6 1 46 5 1           4     1 1 69
Steinhausen 3     15 1 1       2   12 1   1 2   1 1           138 21 199
Sursee 10     5     1   2     93   2 3 1     1 1     1   4 5 129
Vernier       1   1 5 201         5 1             3   64 3 5 6 295
Villars-sur-Glâne       3     141 4         7                   20 4 1 4 184
Wetzikon (ZH)   1   1         1 1   3     1 6 3   4 3     2   1 182 209
Winterthur                                                   3 3
Zofingen 46                                 2             1 1 50
Zürich 42 1   31 16 19 2 10 3 15 6 22 1 2 12 23 12 5 46 9 5 1 9 3 89 779 1'163
∑ 756 9 20 737 230 251 181 256 34 100 45 457 48 71 103 199 35 428 147 97 174 65 367 177 339 1'334 6'660

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: 6'661

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
Evolve Group SA CHE-494.384.690 Bellinzona 05.08.2026 Auditor switch Lamone
FONDATION DU COEUR R. & C. AFFOLTER CHE-360.578.899 Fontenais 05.08.2026 Auditor switch Delémont
Verein Move On CHE-199.046.218 Untersiggenthal 05.08.2026 Auditor switch Baden
WT Industrial Holding AG CHE-385.437.401 Maur 05.08.2026 Auditor switch Zofingen
Arosa Lenzerheide Service AG CHE-272.088.199 Vaz/Obervaz 04.08.2026 First auditor Chur
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
Speckert Klein Beschriftungen AG CHE-293.653.604 Volketswil 05.08.2026 Opting-out Lachen
Tox-Pressotechnik AG CHE-106.638.259 Gelterkinden 05.08.2026 Opting-out Liestal
Akzo Nobel Coatings AG CHE-106.001.211 Neuenkirch 04.08.2026 Auditor switch Luzern
Kursaal Engelberg AG CHE-114.677.847 Engelberg 04.08.2026 Opting-out Stans
X-Compound GmbH CHE-108.510.707 Kaisten 03.08.2026 Opting-out Basel