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Fact Sheet Senn & Partner AG, Wirtschaftsprüfungs- und Treuhandgesellschaft

Core Company Information
Company Name Senn & Partner AG, Wirtschaftsprüfungs- und Treuhandgesellschaft
UID CHE-103.852.891
Alternative / previous Names Senn & Partner AG, Revisions- und Treuhandgesellschaft (until 14.09.1998)
Domicile Wetzikon (ZH)
Canton ZH
Legal Form Limited corporation
Inscription Date 03.02.1987
FAOA Information
FAOA ID 501086
RAB Permission licensed audit expert
FAOA License active (since 09.11.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (0) -
Membership in Associations EXPERTsuisse
Number of auditors with permission 3  (18.33 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 16.3 years (max.: 33.3 years)

Total number of statutory audit clients: 55 (Ranked #160 in Switzerland)

Change in number of audit engagements: - (since 31.12.2025), +4 (over the last 12 months)

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

  Appenzell Innerrhoden St. Gallen Zug Zürich ∑
Limited corporation   4 1 26 31
Limited liability company       1 1
Foundation 1   1 19 21
Cooperative       1 1
Association       1 1
∑ 1 4 2 48 55

This audit firm is recorded as statutory auditor for 18 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
issuance.swiss AG CHE-340.510.964 Zug 06.10.2025 Auditor switch Wetzikon (ZH)
stakeholder.swiss Stiftung CHE-168.673.365 Zug 14.08.2025 Auditor switch Wetzikon (ZH)
Wise Medicine AG CHE-336.931.676 Winterthur 25.03.2025 First auditor Wetzikon (ZH)
Duplex Architekten AG CHE-113.676.124 Zürich 25.02.2025 First auditor Wetzikon (ZH)
Grimm Immobilien AG CHE-177.047.468 Küsnacht (ZH) 20.06.2023 Auditor switch Wetzikon (ZH)
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
Stiftung für gemeinnützige Zwecke der ehemaligen Sparkasse Stäfa CHE-102.045.379 Stäfa 10.05.2024 Auditor switch Wetzikon (ZH)
Fichtner Swiss GmbH in Liquidation CHE-189.789.536 Oetwil am See 28.03.2024 Opting-out Wetzikon (ZH)
Swiss Innovation Pool AG in Liquidation CHE-488.071.403 Freienbach 15.11.2022 Opting-out Wetzikon (ZH)
Stiftung "Uetiker Tanne" der ehemaligen Sparkasse Uetikon am See CHE-110.395.841 Uetikon am See 02.03.2022 Auditor switch Wetzikon (ZH)
Zelgli Immobilien AG CHE-102.550.298 Wollerau 31.08.2017 Opting-out Wetzikon (ZH)