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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 50  (26.18 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 11.1 years (max.: 33.9 years)

Total number of statutory audit clients: 1'309 (Ranked #5 in Switzerland)

Change in number of audit engagements: -1 (since 31.12.2025), +18 (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 100   14 35 7 11 1 9 14 12 3 14 1 1 165 14 5 57 111 3 2 4 1 38 287 909
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 19 1 11 1   2     1     42 3   6 18         1 98 223
Cooperative 2               1           6       4       1   16 30
Association     1 5   2       1   1     11   1 1 2     1   1 34 61
Special legal forms                 1                   1           1 3
∑ 124 1 19 63 9 25 3 10 19 14 3 19 2 1 240 19 7 70 142 3 2 8 3 42 461 1'309

This audit firm is recorded as statutory auditor for 495 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 1'309 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 1   1 1 2         6 24 134
Basel           1                                       1
Berikon                                               1 3 4
Chur                   3                               3
Köniz       30     1 2     3           1 1       1   1   40
Lachen                                                 1 1
Neuhausen am Rheinfall                               6     1           2 9
Rapperswil-Jona 1     1   3     13 2   1 2   42   1 32 1   2     2 41 144
Schwyz                       2           24               26
St. Gallen 2 1 10 4 1 1 1 1 2 2   4     109 1 1 1 15     3 1   24 184
St. Gallen 1   9 4 1 1     1 6   1     70 2 1 3 20 2       5 28 155
Weinfelden                             5 2     88       1   6 102
Zürich 44     18 4 10 1 6 3 1   8     13 8 2 8 15 1   4 1 27 332 506
∑ 124 1 19 63 9 25 3 10 19 14 3 19 2 1 240 19 7 70 142 3 2 8 3 42 461 1'309

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: 1'687

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
Sirana GmbH CHE-383.841.889 Glarus Nord 20.07.2026 First auditor Zürich
Ineo AG CHE-340.426.683 Seuzach 16.07.2026 First auditor Zürich
Besop AG CHE-244.550.904 Seuzach 14.07.2026 First auditor Zürich
Personalvorsorgestiftung der Rauscher & Stoecklin AG CHE-109.730.186 Sissach 13.07.2026 Auditor switch Baden
Stiftung SBS Schweizerische Bibliothek für Blinde, Seh- und Lesebehinderte CHE-115.084.673 Zürich 10.07.2026 Auditor switch Zürich
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
Sauter, Bachmann AG CHE-101.446.505 Glarus 17.07.2026 Auditor switch Rapperswil-Jona
Lerch AG Bauunternehmung CHE-105.788.471 Winterthur 16.07.2026 Opting-out Zürich
KINOTHEATER MADLEN AG CHE-112.426.783 Au (SG) 15.07.2026 Auditor switch St. Gallen
Nauen Immobilien AG CHE-106.957.664 Dürnten 02.07.2026 Opting-out St. Gallen
Hospitality Swiss Proco AG CHE-166.578.862 Küsnacht (ZH) 01.07.2026 Auditor switch Basel