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Fact Sheet Onestra AG

Core Company Information
Company Name Onestra AG
UID CHE-106.841.211
Alternative / previous Names Fölmli Treuhand AG (until 13.01.2023)
Domicile Hünenberg
Canton ZG
Legal Form Limited corporation
Inscription Date 06.01.1999
FAOA Information
FAOA ID 500262
RAB Permission licensed audit expert
FAOA License active (since 05.11.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (0) -
Membership in Associations -
Number of auditors with permission 2  (6.50 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.3 years (max.: 24.8 years)

Total number of statutory audit clients: 13 (Ranked #196 in Switzerland)

Change in number of audit engagements: -1 (since 31.12.2025), -1 (over the last 12 months)

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

  GR LU SZ ZG ZH ∑
Limited corporation   5   4 1 10
Foundation 1   1     2
Cooperative   1       1
∑ 1 6 1 4 1 13

This audit firm is recorded as statutory auditor for 20 deleted entities. These are not included in the table above.

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Related audit firms

Same domicile: 

Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
Schreinerei Markus Vogel AG CHE-180.551.000 Schwarzenberg 03.12.2025 First auditor Hünenberg
Fernsehgenossenschaft Schwarzenberg in Liquidation CHE-112.143.339 Schwarzenberg 07.02.2025 Auditor switch Hünenberg
Baugenossenschaft Schwarzenberg (BGS) CHE-102.311.865 Schwarzenberg 12.11.2024 Auditor switch Hünenberg
4M Vogel Immo AG CHE-350.179.210 Schwarzenberg 02.07.2024 Auditor switch Hünenberg
UNIC TALENT FOUNDATION CHE-373.792.025 Maienfeld 06.12.2023 Auditor switch Hünenberg
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
Marc Brandis AG CHE-110.286.896 Zug 25.10.2024 Opting-out Hünenberg
Mimicry AG CHE-360.685.897 Zug 25.10.2024 Opting-out Hünenberg
Satpayevsk Titanium Holding Ltd CHE-101.061.453 Zug 26.08.2024 Opting-out Hünenberg
Winoil AG CHE-106.508.415 Däniken 22.09.2020 Auditor switch Hünenberg
GianCom AG CHE-264.156.083 Zug 25.03.2020 Auditor switch Hünenberg