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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
IIAS
Number of auditors with permission 323  (20.46 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.4 years (max.: 33.5 years)

Total number of statutory audit clients: 6'609 (Ranked #1 in Switzerland)

Change in number of audit engagements: +7 (since 31.12.2025), +297 (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 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 546 8 9 487 165 132 140 197 20 61 31 312 42 53 80 129 25 292 115 70 126 49 264 120 270 826 4'569
Limited liability company 25     28 9 11 13 13 4 8 5 13 7 1 3 16 2 22 6 2 7 2 9 19 29 72 326
Foundation 126   9 131 36 89 14 31 7 17 11 80 1 15 21 39 4 87 15 13 30 11 57 20 36 265 1'165
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 29     46 10 13 1 6   3   22     1 3   14 1   3   14 4 10 61 241
Special legal forms 3 1 1 5 1 2 5 1 2 1   3   1   5 1 5   2 5   6 1   4 55
∑ 757 9 20 731 231 253 181 248 34 96 47 454 51 71 106 195 32 432 141 93 175 65 357 166 348 1'316 6'609

This audit firm is recorded as statutory auditor for 2623 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'609 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 443     12 11 13   1   5   17   1   4   28 3 3 1 1 1   14 63 621
Affoltern am Albis 4       1                         1             3 22 31
Altdorf (UR) 1                 2   2             15     51     3   74
Baden 117     11 1 1       1   7     2     4 2       2 1 4 26 179
Basel 15 1   10 89 182     1 1 1 4   1 3     13     2 2 1   2 27 355
Bern 18     316 2 4 15 4 2 7 1 12 5 1   1 2 11 5 7 1 2 10 16 8 34 484
Biel/Bienne 4     69 2 4 1 2     1   4         6         6     10 109
Burgdorf 2     70     1         1       2   10             1 2 89
Chur                 1 41           1       3             46
Delémont                     21   4                           25
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       3 3   1 3 4   2 1   2 17 1   53 2   1 1 1 5 35 147
Lamone               5   5   3                 157   2   1 3 176
Langenthal       75                           3                 78
Laufen         14                         13     1           28
Liestal 7     3 87 23         1 6   1       8 1       2   1 4 144
Luzern 9     13 1         7   263   14 24 4   1 9   3 3   3 37 42 433
Monthey                                             3 9     12
Muri (AG) 2                                                   2
Nyon               3                             31       34
Olten 11     10 1   1       1             57             5   86
Porrentruy                     8                               8
Porrentruy               1                                     1
Sarnen 1                     4   1 47                       53
Schaffhausen                                 5   1 1           2 9
Sion       1     1 4                             3 114 2   125
Solothurn 6     52 1 1 2       1 3 3   3 1   192     1   1   3 15 285
St. Gallen 3 5 16 1 1       2 5           121 10   2 48     1   5 19 239
Stans 2     2               6 1 46 8 1           4     1 1 72
Steinhausen 3     15 1         2   12 1   1 3   1 2           140 22 203
Sursee 11     5     1   2     91   3 3 1       1     1   5 6 130
Vernier       1   1 6 196         6 1             3   58 2 5 6 285
Villars-sur-Glâne       4     140 3         7                   17 4 2 4 181
Wetzikon (ZH)   1   1         1 1   3     1 4 3   4 3     2   5 173 202
Winterthur                                                   1 1
Zofingen 44                                 2             2   48
Zürich 42 1   27 15 19 3 10 3 15 6 18 1 2 11 24 11 5 42 10 5 1 9 2 88 778 1'148
∑ 757 9 20 731 231 253 181 248 34 96 47 454 51 71 106 195 32 432 141 93 175 65 357 166 348 1'316 6'609

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: 6'610

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
Creusillon SA CHE-103.546.313 Val Terbi 09.02.2026 Auditor switch Delémont
Fondation Aurore Happy Home CHE-110.088.818 Porrentruy 09.02.2026 Auditor switch Delémont
Pythom Global AG CHE-273.838.069 Zug 06.02.2026 First auditor Steinhausen
S. Ingrascina Losone GmbH, mit Sitz in Luzern CHE-235.502.533 Luzern 06.02.2026 Auditor switch Lamone
Depima AG CHE-333.706.203 Moosseedorf 05.02.2026 First auditor Bern
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
Genossenschaft Krankengeldversicherung JardinSuisse in Liquidation CHE-103.805.035 Aarau 09.02.2026 Auditor switch Zürich
RE Capital (Switzerland) SA CHE-363.019.099 Genève 09.02.2026 Auditor switch Vernier
ender holding ag CHE-271.146.061 Bern 04.02.2026 Auditor switch Zürich
PSR Robotics Holding I AG CHE-449.165.118 Burgdorf 04.02.2026 Opting-out Burgdorf
AVET AG CHE-107.410.210 Cham 02.02.2026 Auditor switch Wetzikon (ZH)