Tired of renewing your auditor permission?

Get detailed statistics about any audit firm in Switzerland. Just type the auditor name in the field below and off you go!

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 (42) 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 SA (CHE-309.054.162) in Porrentruy (JU)
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 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
SVIR
Number of auditors with permission 328  (19.49 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.2 years (max.: 32.9 years)

Total number of statutory audit engagements: 6'394 (Ranked #1 in Switzerland)

Change in number of audit engagements: +90 (since 31.12.2024), +158 (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 13 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 527 5 9 493 145 115 133 191 20 57 32 306 40 52 78 120 21 285 115 71 124 50 263 114 260 792 4'418
Limited liability company 21     27 9 12 13 15 4 8 5 12 6 1 3 16 2 22 7 2 7 2 9 17 27 70 317
Foundation 119   11 129 34 77 13 31 7 15 12 80 1 15 19 39 4 85 14 13 29 11 55 21 35 263 1'132
Cooperative 24   1 35 9 5 8   1 6   23 1 1 1 3   12 4 6 4 3 6 2 3 83 241
Association 24     45 9 13 1 6   2   22     1 4   14 1   3   13 4 10 58 230
Special legal forms 2 1 1 6 1 2 5 3 2 1   3   1   5   5   2 5   6 1   4 56
∑ 717 6 22 735 207 224 173 246 34 89 49 446 48 70 102 187 27 423 141 94 172 66 352 159 335 1'270 6'394

This audit firm is recorded as statutory auditor for 2587 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'394 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 445     11 12 12   1   5   18   1   2   28 4 3   1 1   14 63 621
Affoltern am Albis 5       1                                       3 22 31
Altdorf (UR) 1                 1   2             13     52     3   72
Baden 111     10 1 2       1   7     2     4 2       2 1 4 25 172
Basel 10     10 68 153     1     2   1 2     11     2 2 1   2 17 282
Bern 18     322 2 4 15 4 2 7 1 12 5 1   1 1 11 5 6 1 2 10 16 8 30 484
Biel/Bienne 3     70 2 5 1 1     1   3         6         5     10 107
Burgdorf 2     67     1         1           9             1 2 83
Chur                 1 42           1       3             47
Delémont       1             8   4                           13
Epalinges       1     9 19     6   18         1 1       211 14 2   282
Frauenfeld                               1       14         1 4 20
Glarus     1 1         19             9     1             10 41
Grenchen       30 1 2 1               1 1   76     1   1   3 6 123
Herisau   1 3                         1                   2 7
Lachen 12   2   3 2   1 3 4   2     1 14 1   52 2   1     4 27 131
Lamone               4   5   2                 156   1   1 4 173
Langenthal       75                           3                 78
Laufen         13                         14                 27
Liestal 7     1 83 22         2 5   1       7 1       3   1 5 138
Luzern 9     13 1         7   257   14 22 4   1 8   3 3   4 39 42 427
Monthey                                             3 8     11
Muri (AG) 2                                                   2
Nyon               3                             27       30
Olten 11     8 1   1       1 1           48             5   76
Porrentruy               1                                     1
Porrentruy       1             24                               25
Sarnen 1                     4   1 47                       53
Schaffhausen                                 1                 2 3
Sion             1 3                             3 108 2   117
Solothurn 6     55 1 1 2         3 3   3 1   195     1   1   3 14 289
St. Gallen 3 3 16 1 1       2 4           120 10 1 2 51     1   5 19 239
Stans 2     2               7 1 45 8 1           4     1 1 72
Steinhausen 3     14 1     1   2   12 1   1 3   1 2           130 21 192
Sursee 11     5     1   2     92   3 3 1       1     1   6 8 134
Vernier       1     7 196         6 1       1     3   53 2 6 7 283
Villars-sur-Glâne       4     132 2         6                   17 4 2 4 171
Wetzikon (ZH) 3 1   1         1     2     1 4 3   4 3     2   3 160 188
Zofingen 9                                 2                 11
Zürich 43 1   31 16 21 2 10 3 11 6 17 1 2 11 23 11 4 46 11 5 1 9 2 86 765 1'138
∑ 717 6 22 735 207 224 173 246 34 89 49 446 48 70 102 187 27 423 141 94 172 66 352 159 335 1'270 6'394

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), Zofingen, Zürich.

Related audit firms

Network:

Total number of audit engagements across the network: 6'395

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
Ekkiden Technologies SA CHE-345.305.383 Ecublens (VD) 18.07.2025 Auditor switch Epalinges
FIRE SYSTEM SA CHE-105.418.229 Bulle 18.07.2025 Auditor switch Villars-sur-Glâne
FSLG Holding SA CHE-455.142.321 Vuadens 18.07.2025 First auditor Villars-sur-Glâne
Fuhr Buser Partner Bauökonomie AG CHE-105.591.603 Basel 18.07.2025 Auditor switch Basel
Valea Structured Finance AG CHE-460.865.715 Luzern 18.07.2025 First auditor 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
Crypto Finance AG CHE-433.965.277 Zürich 18.07.2025 Auditor switch Zürich
Nuclidium AG CHE-412.395.606 Basel 18.07.2025 Auditor switch Basel
Appenzeller Versicherungen Genossenschaft CHE-105.784.272 Schwende-Rüte 17.07.2025 Auditor switch Zürich
Folien Fischer AG in Liquidation CHE-103.476.291 Dottikon 17.07.2025 Discontinued Aarau
HR Talent House SA CHE-348.085.137 Genève 17.07.2025 Auditor switch Vernier