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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  (19.87 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.7 years (max.: 34.2 years)

Total number of statutory audit clients: 6'675 (Ranked #1 in Switzerland)

Change in number of audit engagements: +77 (since 31.12.2025), +210 (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 11 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 539 7 9 491 163 134 138 203 19 64 29 317 39 53 78 129 27 287 117 74 131 47 272 132 267 832 4'598
Limited liability company 27     28 9 9 12 15 4 8 5 14 7 2 2 17 4 20 8 2 9 2 11 18 28 75 336
Foundation 121   9 132 37 90 15 33 8 17 10 78 1 15 22 42 4 86 16 15 30 10 57 22 35 267 1'172
Cooperative 28   1 34 9 6 7   1 6   23 1 1 1 3   12 4 6 4 2 7 2 3 89 250
Association 32     49 10 12 1 7   4   23       3 1 16 1   3   14 5 8 67 256
Special legal forms 4 1 1 5 2 3 5   2 2   3   1 1 5 1 5   2 5   6 2   7 63
∑ 751 8 20 739 230 254 178 258 34 101 44 458 48 72 104 199 37 426 146 99 182 61 367 181 341 1'337 6'675

This audit firm is recorded as statutory auditor for 2716 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'675 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 428     10 10 13   1   5   15   1   5   29 3 3 1 1 1   14 61 601
Affoltern am Albis 6       1                         1             3 23 34
Altdorf (UR) 1                 2   2             15     47     4   71
Baden 126     12 1 1       1   7     2     4 3       1 1 2 29 190
Basel 15     8 90 182   1 1 1 1 5   1 3   1 14     2 2 1   2 29 359
Bern 17     322 2 3 15 5 2 7 1 13 5 1   1 2 10 5 8 1 2 10 17 8 39 496
Biel/Bienne 2     68 2 4 1 2     1   4         6   1     6     9 106
Bulle             2                                       2
Burgdorf 2     70     1         1       2   10             1 3 90
Chur                 1 46           1       3             51
Delémont               1     26   4                           31
Epalinges       3     8 18     5   15         1 1       211 14 2 1 279
Frauenfeld                               1       16         1 4 22
Glarus     1 1         19 1           8     1             8 39
Grenchen       33 1 2 1               1 1   75     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 5 32 142
Lamone           1   5   4   3                 161   2   1 3 180
Langenthal       74                           3                 77
Laufen         14                         13     1           28
Liestal 7     2 86 22           9   1       7 1       1   1 4 141
Luzern 9     13 1         7   257   15 25 4   1 9   3 3   3 37 44 431
Monthey               1                             4 11     16
Muri (AG) 2                                                   2
Nyon               4                             32       36
Olten 11     9 1   1       1             57             5   85
Porrentruy                     2                               2
Sarnen 1                     4   1 46                       52
Schaffhausen                                 8   1 2           3 14
Sion       1     1 4                             3 124 3   136
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 2           4     1 1 70
Steinhausen 3     15 1 1       2   12 1   1 2   1 1           140 21 201
Sursee 10     5     1   2     94   2 3 1     1 2     1   4 5 131
Vernier       1   1 5 200         5 1             5   61 3 6 5 293
Villars-sur-Glâne       3     138 4         7                   20 4 1 4 181
Wetzikon (ZH)   1   1         1 1   3     1 5 3   4 3     2   1 181 207
Winterthur                                                   6 6
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 87 777 1'162
∑ 751 8 20 739 230 254 178 258 34 101 44 458 48 72 104 199 37 426 146 99 182 61 367 181 341 1'337 6'675

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: 6'676

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
SWIDEX GmbH Reinigungen & Hauswartungen CHE-109.494.488 Obersiggenthal 09.10.2026 First auditor Baden
Francis Dubey constructions métalliques SA CHE-112.328.293 Fontenais 08.10.2026 Auditor switch Delémont
J&K Wonderland Stiftung CHE-186.621.484 Steinhausen 08.10.2026 Auditor switch Steinhausen
PERI AG CHE-107.896.574 Seuzach 08.10.2026 Auditor switch Zürich
Stiftung Luftseilbahn Reigoldswil-Wasserfallen LRW CHE-106.123.825 Reigoldswil 08.10.2026 Auditor switch Liestal
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
hfs Financial Services AG CHE-108.422.977 Baar 07.10.2026 Auditor switch Zürich
Europäische Hospitality Allianz AG CHE-101.319.344 Schwende-Rüte 06.10.2026 Discontinued Basel
Heimbach Switzerland AG CHE-102.411.952 Olten 06.10.2026 Opting-out Olten
Iten, Bühlmann & Partner AG CHE-114.660.775 Wetzikon (ZH) 06.10.2026 Auditor switch Wetzikon (ZH)
ALEVO GROUP SA en liquidation concordataire CHE-482.059.639 Martigny 05.10.2026 Discontinued Sion