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Fact Sheet OBT AG

Core Company Information
Company Name OBT AG
UID CHE-109.029.855
Alternative / previous Names OBT SA, OBT Ltd
OBT Treuhand AG
Domicile St. Gallen
Canton SG
Legal Form Limited corporation
Inscription Date 19.12.1972
Website https://www.obt.ch
Phone +41 55 222 89 24
Offered services

Audit services

  • limited statutory examination (art. 727a CO)
  • ordinary statutory audit (art. 727 CO)
  • audit of public interest entities (e.g., listed companies)
  • audit of incorporation or capital increase reports (art. 635a and 652f CO)
  • audit of capital decreases (art. 653m CO)
  • audit in relation to early distribution of assets (art. 745 CO)
  • audits in the context of the merger law
  • limited statutory examination according to art. 725a CO
  • other special examinations based on legal requirements (such as in the context of relocations or public bids)
  • reviews (according to ISRE 2400 or ISRE 2410)
  • audit of the equal pay analysis (art. 13d GEA)
  • audit of non-financial reports (such as sustainability reports according to art. 964a CO)

Non-audit services

  • accounting and fiduciary services
  • consulting
  • tax consulting
  • legal advice
  • real estate (fiduciary, management)
  • due diligence
  • valuation services

Covered accounting standards

  • CO (Code of Obligations)
  • Swiss GAAP FER
  • IFRS (International Financial Reporting Standards)
  • HAM2 (Harmonized Accounting Model 2)

Covered languages

  • German
  • French
  • English
  • Italian
FAOA Information
FAOA ID 500149
RAB Permission state-regulated audit firm
FAOA License active (since 11.10.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (13) OBT AG (CHE-373.077.879) in Andelfingen (ZH)  
OBT AG (CHE-210.232.211) in Basel (BS)
OBT AG (CHE-168.775.770) in Berikon (AG)
OBT AG (CHE-334.580.117) in Brugg (AG)
OBT AG (CHE-327.526.012) in Chur (GR)
OBT AG (CHE-323.201.462) in Köniz (BE)
OBT AG (CHE-307.177.931) in Lachen (SZ)
OBT AG (CHE-485.195.747) in Neuhausen am Rheinfall (SH)
OBT AG, Zweigniederlassung Rapperswil SG (CHE-193.282.619) in Rapperswil-Jona (SG)
OBT AG (CHE-248.888.710) in Schwyz (SZ)
OBT AG, Filiale St. Gallen (CHE-406.591.524) in St. Gallen (SG)
OBT AG (CHE-334.233.957) in Weinfelden (TG)
OBT AG (CHE-384.364.751) in Zürich (ZH)
OBT AG (CHE-399.743.258) in Appenzell (AI)
OBT AG (CHE-146.882.156) in Au (SG) (SG)
OBT AG (CHE-215.974.544) in Bern (BE)
OBT AG, Zweigniederlassung Buchs SG (CHE-455.360.450) in Buchs (SG) (SG)
OBT AG (CHE-377.425.583) in Frauenfeld (TG)
OBT AG, Zweigniederlassung Gossau SG (CHE-289.898.315) in Gossau (SG) (SG)
OBT AG (CHE-358.596.480) in Wädenswil (ZH)
OBT AG (CHE-457.478.430) in Winterthur (ZH)
OBT AG (CHE-269.654.359) in Zug (ZG)
Membership in Associations EXPERTsuisse
Number of auditors with permission 51  (25.71 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11 years (max.: 33.4 years)

Total number of statutory audit clients: 1'311 (Ranked #5 in Switzerland)

Change in number of audit engagements: - (since 31.12.2025), +58 (over the last 12 months)

Number of audit clients listed on a Swiss stock exchange: 2 (thereof 0 in the SMI, 0 in the SMI Expanded and 0 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 SG SH SO SZ TG TI UR VD VS ZG ZH ∑
Limited corporation 105   14 35 8 10 1 9 14 12 3 14 1 1 164 13 4 57 111 3 2 4 1 37 290 913
Limited liability company 4 1 2 4 1 1 1 1   1 1 3 1   16 3 1 5 6     3   2 29 86
Foundation 18   3 18   11     2     1     41 4   6 18         1 96 219
Cooperative 2               1           6       4       1   16 30
Association     1 4   2       1   1     11   1 1 2     1   1 34 60
Special legal forms                 1                   1           1 3
∑ 129 1 20 61 9 24 2 10 18 14 4 19 2 1 238 20 6 69 142 3 2 8 2 41 466 1'311

This audit firm is recorded as statutory auditor for 482 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 1'311 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 SG SH SO SZ TG TI UR VD VS ZG ZH ∑
Basel           1                                       1
Berikon                                               1 3 4
Brugg 78     6 2 9   1       4   1 1 1 1 1 2         6 23 136
Chur                   3                               3
Köniz       28       1     3           1 1       1   1   36
Neuhausen am Rheinfall                               6     1           2 9
Rapperswil-Jona 1     1   2     13 2     2   40   1 30 1   2     2 42 139
Schwyz                       2           24               26
St. Gallen 2 1 10 4 1 1 1 1 2 2   4     110 1 1 1 15     3     24 184
St. Gallen 1   10 4 1 1     1 6   1     73 2   3 20 2       5 31 161
Weinfelden                             2 2     87       1   6 98
Zürich 47     18 5 10 1 7 2 1 1 8     12 8 2 9 16 1   4 1 26 335 514
∑ 129 1 20 61 9 24 2 10 18 14 4 19 2 1 238 20 6 69 142 3 2 8 2 41 466 1'311

Show client list for Basel, Berikon, Brugg, Chur, Köniz, Neuhausen am Rheinfall, Rapperswil-Jona, Schwyz, St. Gallen, St. Gallen, Weinfelden, Zürich.

Related audit firms

Network:

Total number of audit engagements across the network: 1'687

Direct personal relationship:

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
Advokatur Baden AG CHE-169.921.637 Baden 16.01.2026 First auditor Brugg
Verein Desert Flower Schweiz CHE-330.389.359 Speicher 07.01.2026 Auditor switch St. Gallen
CASA-VITA/Frefel Holzbau AG CHE-106.912.348 Glarus Nord 24.12.2025 Auditor switch Rapperswil-Jona
Schlatter Telematik AG CHE-103.425.974 Frauenfeld 18.12.2025 Auditor switch Weinfelden
BKG Architekten AG CHE-101.630.919 Zürich 28.11.2025 Auditor switch St. Gallen
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
Bachofen Immobilien AG CHE-105.979.640 Uster 06.01.2026 Opting-out Zürich
Genossenschaft Fontana Passugg CHE-108.795.450 Churwalden 19.12.2025 Auditor switch St. Gallen
Copy Quick Pierre-Alain Mouttet AG in Liquidation CHE-113.003.296 Bern 17.12.2025 Discontinued Köniz
OOS AG CHE-101.548.212 Zürich 17.12.2025 Auditor switch Zürich
Zürichsee-Gut AG CHE-100.149.677 Stäfa 12.12.2025 Auditor switch Zürich