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Fact Sheet Wadsack Zug AG

Core Company Information
Company Name Wadsack Zug AG
UID CHE-109.364.928
Alternative / previous Names Wadsack Zug SA, Wadsack Zug Ltd.
WEY & SPIESS Treuhand und Revisions AG (until 06.06.2018)
Domicile Zug
Canton ZG
Legal Form Limited corporation
Inscription Date 27.11.2001
Takeovers: Wey & Spiess, Treuhand- und Revisionsgesellschaft (CHE-107.951.368), per 27.11.2001
FAOA Information
FAOA ID 500364
RAB Permission licensed audit expert
FAOA License active (since 31.10.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (0) -
Membership in Associations EXPERTsuisse
TREUHAND|SUISSE
Number of auditors with permission 2  (70.00 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 8.9 years (max.: 32.2 years)

Total number of statutory audit clients: 140 (Ranked #82 in Switzerland)

Change in number of audit engagements: +1 (since 31.12.2025), +13 (over the last 12 months)

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

  BE BL BS GE SO SZ TI VD ZG ZH ∑
Limited corporation 1     1 2 3 4 1 58 4 74
Limited liability company   1   1         6   8
Foundation 1   1         1 43 4 50
Cooperative                 2   2
Association                 6   6
∑ 2 1 1 2 2 3 4 2 115 8 140

This audit firm is recorded as statutory auditor for 43 deleted entities. These are not included in the table above.

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Related audit firms

Network:

Total number of audit engagements across the network: 160

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
Unicity Stiftung CHE-379.138.605 Zug 16.01.2026 First auditor Zug
XYGLE Stiftung CHE-275.932.911 Zug 06.01.2026 First auditor Zug
Ryf AG CHE-106.926.853 Grenchen 19.12.2025 Auditor switch Zug
MS Pharma International AG CHE-344.030.203 Steinhausen 28.11.2025 Auditor switch Zug
MTT Global Fondation CHE-252.770.023 Lausanne 21.10.2025 First auditor Zug
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
Intellishore AG CHE-236.512.132 Zug 03.02.2026 Auditor switch Zug
PraSaga Stiftung in Liquidation CHE-459.917.736 Zug 21.10.2025 Discontinued Zug
L1X Stiftung CHE-311.270.462 Zug 19.09.2025 Discontinued Zug
Antiquorum Management AG CHE-361.174.719 Zürich 24.10.2024 Auditor switch Zug
Fundamenta Group Immobilien Holding AG CHE-325.218.692 Zug 25.09.2024 Opting-out Zug