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Fact Sheet Martin Mahler Treuhand GmbH

Core Company Information
Company Name Martin Mahler Treuhand GmbH
UID CHE-105.657.840
Alternative / previous Names Mahler + Zimmermann Treuhand GmbH (until 17.06.2004)
Domicile Engelberg
Canton OW
Legal Form Limited liability company
Inscription Date 09.10.2000
FAOA Information
FAOA ID 501960
RAB Permission licensed auditor
FAOA License active (since 05.12.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (0) -
Membership in Associations TREUHAND|SUISSE
Number of auditors with permission 1  (37.00 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 8.6 years (max.: 18.2 years)

Total number of statutory audit clients: 37 (Ranked #176 in Switzerland)

Change in number of audit engagements: +1 (since 31.12.2025), - (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 LU NW OW ZG ZH ∑
Limited corporation 4 1 10 4 4 3 2 28
Limited liability company     1 1       2
Foundation   1 2 1 3     7
∑ 4 2 13 6 7 3 2 37

This audit firm is recorded as statutory auditor for 2 deleted entities. These are not included in the table above.

Display client list

Latest audit engagements
These are this auditor's latest audit engagements.
 
Client Name Client UID Domicile Start Date Type of switch Auditor Branch
Müller Gärtner von Eden AG CHE-136.698.740 Udligenswil 03.02.2026 Auditor switch Engelberg
Erni Planung AG CHE-382.202.557 Schongau 05.09.2025 First auditor Engelberg
Stiftung A.-M. S. PLUS CHE-234.461.222 Luzern 31.07.2024 First auditor Engelberg
Stiftung Kopernikus CHE-155.560.467 Engelberg 13.09.2023 First auditor Engelberg
Golfhotel "Les Hauts de Gstaad" SA CHE-107.218.049 Saanen 17.12.2021 Auditor switch Engelberg
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
Luftseilbahn Dallenwil-Wirzweli AG (LDW) CHE-106.903.786 Dallenwil 22.10.2025 Auditor switch Engelberg
Dentavista AG CHE-419.679.602 Reinach (BL) 02.05.2025 Auditor switch Engelberg
Strassen- und Kanalisationsgenossenschaft Fellenrüti und Züg, Engelberg CHE-102.019.086 Engelberg 14.03.2024 Auditor switch Engelberg
Enerprice Partners AG CHE-103.409.981 Root 08.02.2023 Auditor switch Engelberg
AKS Auto Senn AG CHE-102.951.421 Hinwil 08.03.2022 Opting-out Engelberg