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

Average engagement duration: 10.6 years (max.: 33.9 years)

Total number of statutory audit clients: 6'668 (Ranked #1 in Switzerland)

Change in number of audit engagements: +70 (since 31.12.2025), +285 (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 550 8 9 489 162 133 141 203 20 61 30 314 40 52 79 127 25 291 117 69 126 49 272 126 272 836 4'601
Limited liability company 26     29 9 10 12 14 4 8 5 13 7 2 3 17 3 21 8 2 8 2 10 20 28 72 333
Foundation 123   9 132 36 91 15 31 8 17 10 81 1 15 21 41 4 87 17 15 30 11 56 22 37 266 1'176
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 7   4   22     1 3 1 15 1   3   14 4 9 61 245
Special legal forms 4 1 1 5 2 2 5 1 2 2   3   1   5 1 5   2 5   6 2   5 60
∑ 760 9 20 737 229 254 182 256 35 98 45 457 49 71 105 196 34 431 147 94 176 65 365 176 349 1'328 6'668

This audit firm is recorded as statutory auditor for 2662 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'668 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 436     12 11 13   1   5   16   1   5   29 3 3 1 1 1   14 58 610
Affoltern am Albis 6       1                         1             3 22 33
Altdorf (UR) 1                 2   2             15     51     4   75
Baden 123     12 1 1       1   7     2     4 3       1 1 3 29 188
Basel 16 1   10 88 183     1 1 1 5   1 3     13     2 2 1   2 26 356
Bern 18     318 2 3 15 5 2 7 1 12 5 1   1 2 11 5 7 1 2 10 16 8 38 490
Biel/Bienne 4     69 2 4 1 2     1   4         6   1     6     10 110
Bulle             2                                       2
Burgdorf 2     70     1         1       2   10             1 2 89
Chur                 1 44           1       3             49
Delémont               1     23   4                           28
Epalinges       2     8 17     5   17         1 1       207 15 2   275
Frauenfeld                               1       16         1 4 22
Glarus     1 1         20             8     1             8 39
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 16 1   53 1   1   1 5 34 143
Lamone           1   5   4   3                 158   2   1 3 177
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               1                             4 11     16
Muri (AG) 2                                                   2
Nyon               3                             31       34
Olten 11     8 1   1       1             57             5   84
Porrentruy                     5                               5
Sarnen 1                     4   1 46                       52
Schaffhausen                                 6   1 1           3 11
Sion       1     1 4                             3 119 3   131
Solothurn 7     53 1 1 2       1 3 3   3 1   190     1   1   4 15 286
St. Gallen 3 5 16 1 1       2 5           122 10   2 49         5 19 240
Stans 2     2               6 1 45 8 1           4     1 1 71
Steinhausen 3     15 1 1       2   12 1   1 2   1 2           139 22 202
Sursee 11     5     1   2     92   3 3 1       1     1   5 5 130
Vernier       1   1 5 202         5 1             3   64 3 5 7 297
Villars-sur-Glâne       4     142 4         7                   19 4 3 4 187
Wetzikon (ZH)   1   1         1 1   3     1 5 3   4 3     2   1 183 209
Winterthur                                                   2 2
Zofingen 46                                 2             2   50
Zürich 41 1   31 16 18 2 10 3 15 6 19 1 2 11 24 12 5 47 9 5 1 9 3 90 777 1'158
∑ 760 9 20 737 229 254 182 256 35 98 45 457 49 71 105 196 34 431 147 94 176 65 365 176 349 1'328 6'668

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: 6'669

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
Anna & Aegidius Tschudi-Streiff Stiftung CHE-178.737.883 Glarus 15.06.2026 First auditor Glarus
Antoine Nettoyages SA CHE-102.429.662 Lancy 12.06.2026 Auditor switch Bern
Kuoni Training & Therapie AG CHE-114.372.106 Sursee 12.06.2026 First auditor Sursee
Arta Architecture Promotion Construction SA CHE-401.062.448 Crissier 11.06.2026 First auditor Epalinges
Behluli Holding AG CHE-272.748.280 Zürich 10.06.2026 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
Stiftung Lernwerk CHE-166.728.506 Windisch 11.06.2026 Auditor switch Aarau
33er Taxi AG CHE-107.877.826 Basel 10.06.2026 Opting-out Basel
François Donzé, Génie Civil et Construction S.A. CHE-111.713.027 Courgenay 10.06.2026 Auditor switch Porrentruy
Taxi-Zentrale AG Basel CHE-109.614.864 Basel 10.06.2026 Opting-out Basel
Kingfluencers AG CHE-138.536.746 Zürich 04.06.2026 Auditor switch Zürich