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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 336  (19.88 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.7 years (max.: 34.2 years)

Total number of statutory audit clients: 6'678 (Ranked #1 in Switzerland)

Change in number of audit engagements: +80 (since 31.12.2025), +210 (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 11 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 538 7 9 491 163 134 140 203 19 64 29 317 37 53 78 129 27 287 117 74 131 47 271 133 268 832 4'598
Limited liability company 27     28 9 9 12 15 4 8 5 14 7 2 2 17 4 20 8 2 9 2 12 18 28 76 338
Foundation 121   9 132 37 91 15 33 8 17 10 78 1 15 22 42 4 86 16 15 30 10 57 22 35 267 1'173
Cooperative 28   1 34 9 6 7   1 6   23 1 1 1 3   12 4 6 4 2 7 2 3 89 250
Association 32     49 10 12 1 7   4   23       3 1 16 1   3   14 5 8 67 256
Special legal forms 4 1 1 5 2 3 5   2 2   3   1 1 5 1 5   2 5   6 2   7 63
∑ 750 8 20 739 230 255 180 258 34 101 44 458 46 72 104 199 37 426 146 99 182 61 367 182 342 1'338 6'678

This audit firm is recorded as statutory auditor for 2717 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 6'678 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 427     10 10 13   1   5   15   1   5   29 3 3 1 1 1   14 61 600
Affoltern am Albis 6       1                         1             3 23 34
Altdorf (UR) 1                 2   2             15     47     4   71
Baden 125     12 1 1       1   7     2     4 3       1 1 2 29 189
Basel 15     8 90 183   1 1 1 1 5   1 3   1 14     2 2 1   2 29 360
Bern 17     322 2 3 15 5 2 7 1 13 5 1   1 2 10 5 8 1 2 10 17 8 39 496
Biel/Bienne 2     68 2 4 1 2     1   2         6   1     6     9 104
Bulle             2                                       2
Burgdorf 2     70     1         1       2   10             1 3 90
Chur                 1 46           1       3             51
Delémont               1     26   4                           31
Epalinges       3     8 18     5   15         1 1       212 15 2 1 281
Frauenfeld                               1       16         1 4 22
Glarus     1 1         19 1           8     1             8 39
Grenchen       33 1 2 1               1 1   75     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 5 33 143
Lamone           1   5   4   3                 161   2   1 3 180
Langenthal       74                           3                 77
Laufen         14                         13     1           28
Liestal 7     2 86 22           9   1       7 1       1   1 4 141
Luzern 9     13 1   1     7   257   15 25 4   1 9   3 3   3 37 45 433
Monthey               1                             4 11     16
Muri (AG) 2                                                   2
Nyon               4                             32       36
Olten 11     9 1   1       1             57             5   85
Porrentruy                     2                               2
Sarnen 1                     4   1 46                       52
Schaffhausen                                 8   1 2           3 14
Sion       1     1 4                             2 124 3   135
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 2           4     1 1 70
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 6 200         5 1             5   61 3 6 5 294
Villars-sur-Glâne       3     137 4         7                   20 4 1 4 180
Wetzikon (ZH)   1   1         1 1   3     1 5 3   4 3     2   1 179 205
Winterthur                                                   6 6
Zofingen 46                                 2             1 1 50
Zürich 42 1   31 16 20 3 11 3 15 6 22 1 3 12 23 12 5 45 9 6 1 9 3 87 778 1'164
∑ 750 8 20 739 230 255 180 258 34 101 44 458 46 72 104 199 37 426 146 99 182 61 367 182 342 1'338 6'678

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: 6'679

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
Domaine du Mont d'Or SA Sion CHE-108.711.016 Sion 14.10.2026 Auditor switch Epalinges
Fredy's AG CHE-101.305.431 Baden 14.10.2026 Auditor switch Zofingen
Green Envelope Holding AG CHE-156.449.358 Dürnten 14.10.2026 First auditor Lachen
Restoroute de la Gruyère S.A. CHE-108.033.529 Pont-en-Ogoz 14.10.2026 Auditor switch Zürich
VeriSign Internet Services Sàrl CHE-111.688.375 Villars-sur-Glâne 14.10.2026 First auditor Vernier
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
Maven House Brands SA CHE-236.026.535 Neuchâtel 14.10.2026 Auditor switch Biel/Bienne
Pépinières Girod SA CHE-112.376.659 Ollon 14.10.2026 Opting-out Sion
R. Fuchs AG CHE-103.413.072 Volketswil 14.10.2026 Auditor switch Wetzikon (ZH)
Swiss Post Cybersecurity AG CHE-108.423.623 Aarau 14.10.2026 Auditor switch Aarau
The 1916 Company Switzerland SA CHE-472.102.831 Neuchâtel 14.10.2026 Auditor switch Biel/Bienne