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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 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: 6'661 (Ranked #1 in Switzerland)

Change in number of audit engagements: +63 (since 31.12.2025), +252 (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 543 8 9 490 162 132 140 203 19 63 30 315 39 52 77 129 25 290 117 72 124 49 272 130 265 839 4'594
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   9 134 36 90 15 31 8 17 10 80 1 15 22 42 4 85 17 15 30 11 57 22 36 264 1'172
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
∑ 754 9 20 739 229 251 181 256 34 100 45 458 48 71 103 199 35 428 147 97 174 65 367 178 339 1'334 6'661

This audit firm is recorded as statutory auditor for 2704 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'661 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 431     10 11 13   1   5   15   1   5   28 3 3 1 1 1   15 57 601
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     319 2 3 15 5 2 7 1 11 5 1   1 2 11 5 7 1 2 10 16 8 39 490
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                 155   2   1 3 174
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   260   15 24 4   1 9   3 3   3 37 43 432
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                             3 121 3   133
Solothurn 7     53 1 1 2       1 3 4   3 2   188     1   1   3 15 285
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           138 21 199
Sursee 10     5     1   2     93   2 3 1     1 1     1   4 5 129
Vernier       1   1 5 200         5 1             4   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 11 3 15 6 22 1 2 12 23 12 5 46 9 5 1 9 3 88 779 1'163
∑ 754 9 20 739 229 251 181 256 34 100 45 458 48 71 103 199 35 428 147 97 174 65 367 178 339 1'334 6'661

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: 6'662

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
Angst+Pfister Sensors and Power AG CHE-106.198.220 Opfikon 13.08.2026 Auditor switch Zürich
Galenica Pensionskasse CHE-109.664.454 Bern 12.08.2026 Auditor switch Bern
Pensionskasse der Fixit AG CHE-109.794.536 Baar 12.08.2026 Auditor switch Aarau
Smart Gorla Services SA CHE-107.332.099 Manno 12.08.2026 Auditor switch Vernier
Gebr. Amberg Bauunternehmung AG CHE-105.888.747 Luzern 11.08.2026 Auditor switch Luzern
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
Ameliora Wealth Management AG CHE-281.575.742 Zürich 13.08.2026 Auditor switch Zürich
Novoglas AG CHE-101.995.309 Villmergen 13.08.2026 Auditor switch Aarau
Refarmed Chemicals SA CHE-108.191.157 Lugano 13.08.2026 Auditor switch Lamone
HOKO Immobilien AG CHE-107.127.487 Wohlen (AG) 10.08.2026 Opting-out Aarau
Speckert Klein Beschriftungen AG CHE-293.653.604 Volketswil 05.08.2026 Opting-out Lachen