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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-334.580.117) in Baden (AG)
OBT AG (CHE-210.232.211) in Basel (BS)
OBT AG (CHE-168.775.770) in Berikon (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 48  (27.29 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11.2 years (max.: 34.2 years)

Total number of statutory audit clients: 1'310 (Ranked #5 in Switzerland)

Change in number of audit engagements: - (since 31.12.2025), -10 (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 101 1 14 35 7 11 1 9 14 13 3 14 1 1 166 16 5 56 112 3 2 4 1 38 282 910
Limited liability company 4 1 2 4 1 1 1 1 1 1   3 1   16 2 1 6 6     3 1 2 25 83
Foundation 18   2 18 1 11 1   2     1     42 3   6 19         1 95 220
Cooperative 2               1           6       4       1   16 30
Association     1 5   2       1   1     12   1 1 2     1   1 36 64
Special legal forms                 1                   1           1 3
∑ 125 2 19 62 9 25 3 10 19 15 3 19 2 1 242 21 7 69 144 3 2 8 3 42 455 1'310

This audit firm is recorded as statutory auditor for 497 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 1'310 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 ∑
Baden 76     6 3 9   1       3   1 2   1 1 2         7 24 136
Basel           1                                       1
Berikon                                               1 3 4
Chur                   3                               3
Köniz       29     1 2     3           1 1       1   1   39
Lachen                                                 1 1
Neuhausen am Rheinfall                               8     1           2 11
Rapperswil-Jona 1     1   3     13 2   1 2   43   1 32 1   2     2 42 146
Schwyz                       2           23               25
St. Gallen 2 1 10 4 1 1 1 1 2 2   4     107 1 1 1 17     3 1   24 184
St. Gallen 1 1 9 4 1 1     1 7   1     71 2 1 3 21 2       5 28 159
Weinfelden                             6 2     87       1   6 102
Zürich 45     18 4 10 1 6 3 1   8     13 8 2 8 15 1   4 1 26 325 499
∑ 125 2 19 62 9 25 3 10 19 15 3 19 2 1 242 21 7 69 144 3 2 8 3 42 455 1'310

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

Related audit firms

Network:

Total number of audit engagements across the network: 1'685

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
Boxler Bau GmbH CHE-114.788.300 Rapperswil-Jona 07.10.2026 First auditor Rapperswil-Jona
Stiftung Schweiz ForAfrika CHE-114.509.322 Zürich 07.10.2026 Auditor switch Baden
SWISSMECHANIC ZÜRICH (SMZH) CHE-105.572.770 Illnau-Effretikon 06.10.2026 First auditor Zürich
ETM Elektro AG CHE-188.011.977 Schaffhausen 01.10.2026 First auditor Neuhausen am Rheinfall
LIGNOX Holzbau AG CHE-404.445.828 Märstetten 30.09.2026 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
Accelerom AG CHE-111.778.239 Dübendorf 15.10.2026 Opting-out Zürich
CSP Nay Engineering AG CHE-106.629.361 Bern 15.10.2026 Auditor switch Köniz
Alvian Holding AG CHE-101.853.715 Arni (AG) 09.10.2026 Auditor switch Zürich
Hartwag AG CHE-102.394.992 Buchs (ZH) 08.10.2026 Auditor switch Zürich
HW Produktions AG CHE-109.821.765 Buchs (ZH) 08.10.2026 Auditor switch Zürich