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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: 10.7 years (max.: 34.1 years)

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

Change in number of audit engagements: +62 (since 31.12.2025), +220 (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 541 8 9 490 163 133 138 202 19 63 30 317 39 53 78 128 25 287 117 74 126 47 273 133 270 831 4'594
Limited liability company 26     28 9 9 12 15 4 8 5 14 7 2 2 17 4 20 8 2 8 2 11 18 28 76 335
Foundation 121   9 132 35 90 15 31 8 17 10 78 1 15 22 42 4 85 16 15 30 11 57 22 34 265 1'165
Cooperative 28   1 34 10 6 8   1 6   23 1 1 1 3   12 4 6 4 2 7 2 3 88 251
Association 32     48 10 12 1 7   4   23       3 1 15 1   3   14 5 8 67 254
Special legal forms 4 1 1 5 2 3 5   2 2   3   1 1 5 1 5   2 5   6 2   5 61
∑ 752 9 20 737 229 253 179 255 34 100 45 458 48 72 104 198 35 424 146 99 176 62 368 182 343 1'332 6'660

This audit firm is recorded as statutory auditor for 2713 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 430     10 10 13   1   5   15   1   5   28 3 3 1 1 1   14 60 601
Affoltern am Albis 6       1                         1             3 23 34
Altdorf (UR) 1                 2   2             15     48     4   72
Baden 125     12 1 1       1   7     2     4 3       1 1 2 28 188
Basel 15 1   8 90 181   1 1 1 1 5   1 3   1 14     2 2 1   2 28 358
Bern 17     321 2 3 15 5 2 7 1 13 5 1   1 2 10 5 8 1 2 10 17 8 39 495
Biel/Bienne 2     68 2 4 1 2     1   4         6   1     6     10 107
Bulle             2                                       2
Burgdorf 2     70     1         1       2   10             1 3 90
Chur                 1 45           1       3             50
Delémont               1     25   4                           30
Epalinges       3     8 17     5   15         1 1       210 14 2 1 277
Frauenfeld                               1       16         1 4 22
Glarus     1 1         19 1           8     1             8 39
Grenchen       32 1 2 1               1 1   75     1   1   3 8 126
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                 155   2   1 3 174
Langenthal       74                           3                 77
Laufen         14                         13     1           28
Liestal 7     2 85 22         1 9   1       7 1       2   1 4 142
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               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                             3 125 3   137
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 1           4     1 1 69
Steinhausen 3     15 1 1       2   12 1   1 2   1 1           141 21 202
Sursee 10     5     1   2     94   2 3 1     1 2     1   4 5 131
Vernier       1   1 5 199         5 1             5   62 3 6 5 293
Villars-sur-Glâne       3     139 4         7                   20 4 1 4 182
Wetzikon (ZH)   1   1         1 1   3     1 5 3   4 3     2   1 182 208
Winterthur                                                   4 4
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 89 774 1'161
∑ 752 9 20 737 229 253 179 255 34 100 45 458 48 72 104 198 35 424 146 99 176 62 368 182 343 1'332 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
Universitäts-Kinderspital beider Basel CHE-112.453.018 Basel 15.09.2026 Auditor switch Basel
Gornergrat Derby Zermatt - Matterhorn CHE-195.993.832 Zermatt 14.09.2026 First auditor Bern
Agriprime Global Commodities GmbH CHE-208.202.258 Zug 11.09.2026 First auditor Vernier
GECAL SA CHE-190.453.304 Val de Bagnes 11.09.2026 Auditor switch Sion
Sette Management AG CHE-457.576.191 Schenkon 11.09.2026 First auditor Sursee
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
ti&m management GmbH CHE-391.452.171 Zürich 15.09.2026 Auditor switch Zürich
ti&m services AG CHE-104.719.332 Zürich 15.09.2026 Auditor switch Zürich
Wohngenossenschaft Geissenstein - EBG CHE-107.227.551 Luzern 15.09.2026 Auditor switch Luzern
Stiftung Eichholz CHE-109.391.977 Zug 14.09.2026 Auditor switch Steinhausen
Stiftung FOKUS FRAUEN CHE-391.689.709 Zürich 14.09.2026 Auditor switch Zürich