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Fact Sheet ONLINE TREUHAND AG

Core Company Information
Company Name ONLINE TREUHAND AG
UID CHE-101.574.132
Alternative / previous Names -
Domicile Reinach (BL)
Canton BL
Legal Form Limited corporation
Inscription Date 12.09.1991
FAOA Information
FAOA ID 500504
RAB Permission licensed audit expert
FAOA License active (since 21.11.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (1) ONLINE TREUHAND AG (CHE-147.549.334) in Laufen (BL)
ONLINE TREUHAND AG (CHE-436.200.805) in Reinach (BL) (BL)
ONLINE TREUHAND AG (CHE-293.441.918) in Zug (ZG)
Membership in Associations EXPERTsuisse
TREUHAND|SUISSE
Number of auditors with permission 7  (13.43 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 10.7 years (max.: 31.7 years)

Total number of statutory audit clients: 94 (Ranked #116 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.

  AG BE BL BS SO TI ZG ZH
Limited corporation 3 1 23 12 9     4 52
Limited liability company     2 4         6
Foundation 1   16 7 1 1 1 3 30
Cooperative   1   1 1     1 4
Association     2           2
4 2 43 24 11 1 1 8 94

This audit firm is recorded as statutory auditor for 44 deleted entities. These are not included in the table above.

Display client list

Audit Engagements by Branch Office

The 94 statutory audits are performed by the branch offices as indicated in the table below.

  AG BE BL BS SO TI ZG ZH
Laufen     1           1
Reinach (BL) 4 2 42 24 11 1 1 8 93
4 2 43 24 11 1 1 8 94

Show client list for Laufen, Reinach (BL).

Related audit firms

Direct personal relationship:

Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
educampus AG CHE-180.256.481 Basel 19.02.2026 First auditor Reinach (BL)
Flaigg AG CHE-108.093.537 Aesch (BL) 13.01.2026 Auditor switch Reinach (BL)
Amaranth CHE-318.733.523 Ettingen 12.01.2026 First auditor Reinach (BL)
StarDent AG CHE-436.578.267 Frenkendorf 09.01.2026 First auditor Reinach (BL)
Genossenschaft Alterssiedlung Breitenbach CHE-104.003.624 Breitenbach 08.01.2026 Auditor switch Reinach (BL)
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
Verein für Krebsforschung CHE-105.823.417 Arlesheim 07.04.2026 Auditor switch Reinach (BL)
Rudolf Wirz Strassen- und Tiefbau AG CHE-492.464.941 Liestal 23.03.2026 Auditor switch Reinach (BL)
Wirz Immobilien und Beteiligungen AG CHE-105.824.138 Liestal 23.03.2026 Auditor switch Reinach (BL)
Reservefonds des Vereins für Krebsforschung CHE-109.725.908 Arlesheim 13.02.2026 Auditor switch Reinach (BL)
Innosystem AG CHE-106.482.661 Zeiningen 31.12.2024 Auditor switch Reinach (BL)