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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 333  (20.02 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.6 years (max.: 33.8 years)

Total number of statutory audit clients: 6'665 (Ranked #1 in Switzerland)

Change in number of audit engagements: +67 (since 31.12.2025), +285 (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 550 8 9 485 163 135 142 197 20 61 31 314 40 53 80 129 25 293 117 69 125 49 273 125 276 837 4'606
Limited liability company 26     29 9 10 12 13 4 8 5 13 7 2 3 17 3 21 8 2 7 2 10 20 29 72 332
Foundation 124   9 132 36 91 15 31 7 17 10 81 1 15 21 40 4 86 15 14 30 11 56 22 37 266 1'171
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     48 10 12 1 6   3   22     1 3 1 15 1   3   14 4 10 61 244
Special legal forms 3 1 1 5 2 2 5 1 2 2   3   1   5 1 5   2 5   6 2   5 59
∑ 760 9 20 733 230 256 183 248 34 97 46 457 49 72 106 197 34 432 145 93 174 65 366 175 355 1'329 6'665

This audit firm is recorded as statutory auditor for 2640 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'665 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 437     12 11 13   1   5   18   1   4   29 3 3 1 1 1   14 62 616
Affoltern am Albis 6       1                         1             3 22 33
Altdorf (UR) 1                 2   2             15     51     4   75
Baden 122     11 1 1       1   7     2     4 3       2 1 5 27 187
Basel 16 1   10 89 184     1 1 1 4   1 3     13     2 2 1   2 27 358
Bern 18     317 2 3 15 4 2 7 1 12 5 1   1 2 12 5 7 1 2 10 16 8 37 488
Biel/Bienne 4     69 2 4 1 2     1   4         6         6     10 109
Bulle             2                                       2
Burgdorf 2     70     1         1       2   10             1 2 89
Chur                 1 43           1       3             48
Delémont               1     23   4                           28
Epalinges       2     9 18     5   17         1 1       206 15 2   276
Frauenfeld                               1       16         1 4 22
Glarus     1 1         19             8     1             8 38
Grenchen       31 1 2 1               1 1   76     1   1   3 8 126
Herisau   1 3                         1                   2 7
Lachen 12       3 3   1 3 4   2 1   2 17 1   53 2   1 1 1 5 34 146
Lamone           1   5   4   3                 156   2   1 3 175
Langenthal       74                           3                 77
Laufen         14                         13     1           28
Liestal 6     3 85 23         1 9   1       8 1       2   1 4 144
Luzern 9     13 1         7   261   15 24 4   1 9   3 3   3 38 42 433
Monthey                                             4 10     14
Muri (AG) 2                                                   2
Nyon               3                             31       34
Olten 11     8 1   1       1             57             5   84
Porrentruy                     6                               6
Sarnen 1                     4   1 47                       53
Schaffhausen                                 6   1 1           2 10
Sion       1     1 4                             3 119 2   130
Solothurn 7     52 1 1 2       1 3 3   3 1   190     1   1   4 15 285
St. Gallen 3 5 16 1 1       2 5           122 10   2 48         5 19 239
Stans 2     2               6 1 46 8 1           4     1 1 72
Steinhausen 3     15 1 1       2   12 1   1 3   1 2           141 22 205
Sursee 11     5     1   2     91   3 3 1       1     1   5 5 129
Vernier       1   1 5 196         5 1             3   64 3 5 7 291
Villars-sur-Glâne       4     142 3         7                   19 4 2 4 185
Wetzikon (ZH)   1   1         1 1   3     1 5 3   4 3     2   5 179 209
Winterthur                                                   2 2
Zofingen 47                                 2             2   51
Zürich 40 1   30 16 19 2 10 3 15 6 19 1 2 11 24 12 5 45 9 5 1 9 3 90 781 1'159
∑ 760 9 20 733 230 256 183 248 34 97 46 457 49 72 106 197 34 432 145 93 174 65 366 175 355 1'329 6'665

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: 6'666

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
Bacardi Martini Patrón International GmbH CHE-114.589.605 Schaffhausen 15.05.2026 Auditor switch Zürich
Portmann Partner AG CHE-107.712.792 Bremgarten (AG) 12.05.2026 First auditor Solothurn
Schweizerisches Nationalmuseum (SNM) CHE-115.401.147 Zürich 12.05.2026 Auditor switch Zürich
TECH MAHINDRA (SWITZERLAND) SA CHE-109.335.281 Vernier 12.05.2026 Auditor switch Vernier
KVA Turgi Energie AG CHE-203.608.601 Baden 11.05.2026 First auditor Baden
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
Meritech AG CHE-102.219.679 Bottmingen 12.05.2026 Opting-out Basel
ICE Automation SA en liquidation CHE-275.157.460 Milvignes 04.05.2026 Discontinued Epalinges
Fondation Villard CHE-273.704.322 Chexbres 29.04.2026 Auditor switch Epalinges
Fondation suisse pour la promotion des échanges et de la mobilité (FPEM) CHE-475.676.330 Bern 27.04.2026 Auditor switch Bern
Kita Muppi GmbH CHE-475.103.672 Zürich 22.04.2026 Auditor switch Lachen