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Fact Sheet hartmannpartner audit ag

Core Company Information
Company Name hartmannpartner audit ag
UID CHE-101.387.162
Alternative / previous Names Wiedenau Generalbau AG (until 21.04.1995)
Wiedenau Treuhand- und Revisions-AG (until 06.05.2024)
Domicile Diepoldsau
Canton SG
Legal Form Limited corporation
Inscription Date 11.09.1987
FAOA Information
FAOA ID 502709
RAB Permission licensed audit expert
FAOA License active (since 28.12.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (0) -
Membership in Associations -
Number of auditors with permission 4  (15.25 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 5 years (max.: 33.3 years)

Total number of statutory audit clients: 61 (Ranked #150 in Switzerland)

Change in number of audit engagements: +6 (since 31.12.2025), +10 (over the last 12 months)

Details regarding the distribution of the audit engagements across legal forms and cantons are depicted in the table below.

  AI AR GR SG SH TG TI ZG ZH ∑
Limited corporation   1 2 25 1   1 1 11 42
Limited liability company 1     10   1     3 15
Foundation                 2 2
Cooperative       1           1
Association       1           1
∑ 1 1 2 37 1 1 1 1 16 61

This audit firm is recorded as statutory auditor for 13 deleted entities. These are not included in the table above.

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Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
Halili + Partner Ingenieure GmbH CHE-331.979.262 Buchs (SG) 30.09.2026 First auditor Diepoldsau
Trägerverein Culinarium CHE-101.858.227 Sennwald 23.09.2026 Auditor switch Diepoldsau
Postresidenz am See AG CHE-384.895.563 Arosa 09.07.2026 First auditor Diepoldsau
Legacy Catering GmbH CHE-287.096.598 Opfikon 06.07.2026 Auditor switch Diepoldsau
Bijoux Catering Inflight & Event Switzerland GmbH CHE-290.578.082 Kloten 15.06.2026 Auditor switch Diepoldsau
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
Schwalm AG CHE-106.365.593 St. Margrethen 01.10.2026 Auditor switch Diepoldsau
Kissling werk statt ware AG CHE-108.786.238 Reiden 18.03.2026 Opting-out Diepoldsau
Catura Holding AG in Liquidation CHE-294.422.094 Kloten 24.02.2026 Discontinued Diepoldsau
SVAX AG in Liquidation CHE-200.201.640 Kloten 18.02.2026 Discontinued Diepoldsau
BQS Bau Qualitäts Service GmbH in Liquidation CHE-426.590.249 Rapperswil-Jona 08.09.2025 Opting-out Diepoldsau