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Fact Sheet RRT AG Treuhand und Revision

Core Company Information
Company Name RRT AG Treuhand und Revision
UID CHE-107.060.038
Alternative / previous Names Riedi Ruffner Theus AG
Domicile Chur
Canton GR
Legal Form Limited corporation
Inscription Date 24.03.1992
Website http://www.rrt.ch
Phone +41 81 258 46 46
FAOA Information
FAOA ID 500334
RAB Permission licensed audit expert
FAOA License active (since 18.10.2007)
Link to FAOA website View auditor profile at FAOA
Branch offices (0) -
Membership in Associations EXPERTsuisse
TREUHAND|SUISSE
Number of auditors with permission 10  (25.20 audit engagements per employee on average)
Auditor Statistics

Average engagement duration: 12.8 years (max.: 33.8 years)

Total number of statutory audit clients: 252 (Ranked #39 in Switzerland)

Change in number of audit engagements: +10 (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.

  AG BE BL BS GL GR NW SG SZ TG TI VD ZG ZH ∑
Limited corporation 3   1 1 3 146 1 5 2 4 2 1 1 7 177
Limited liability company           2   1             3
Foundation           56 1 3         1   61
Cooperative           2                 2
Association   1       5             1   7
Special legal forms           2                 2
∑ 3 1 1 1 3 213 2 9 2 4 2 1 3 7 252

This audit firm is recorded as statutory auditor for 119 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
GR Engadin SA CHE-463.827.326 Silvaplana 05.08.2026 Auditor switch Chur
Hotel Stern Chur AG CHE-112.675.754 Chur 28.07.2026 Auditor switch Chur
Stiftung für Naturwissenschaft und Gesellschaft CHE-456.213.952 Disentis/Mustér 20.07.2026 Auditor switch Chur
Verein Oase Wohn- und Arbeitsbegleitung CHE-200.584.068 Chur 17.07.2026 First auditor Chur
Redon AG CHE-102.785.401 Chur 10.07.2026 Auditor switch Chur
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
GR Engadin SA CHE-463.827.326 Silvaplana 12.08.2026 Auditor switch Chur
Rüegg Architects AG CHE-114.381.223 Flims 14.07.2026 Opting-out Chur
ERWO AG CHE-105.981.447 Chur 25.03.2026 Auditor switch Chur
Schellenberg Chur AG CHE-110.249.027 Chur 25.03.2026 Auditor switch Chur
Speed U Up Suisse AG CHE-207.808.547 Chur 18.12.2025 Auditor switch Chur