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Fact Sheet Ryser Audit AG

Core Company Information

FAOA Information

FAOA ID	505515
RAB Permission	licensed audit expert
FAOA License	active (since 12.06.2024)
Link to FAOA website	View auditor profile at FAOA
Branch offices (0)	-
Membership in Associations	-
Number of auditors with permission	2 (11.50 audit engagements per employee on average)

Auditor Statistics

Average engagement duration: 8.1 years (max.: 19.2 years)

Total number of statutory audit clients: 23 (Ranked #185 in Switzerland)

Change in number of audit engagements: +2 (since 31.12.2025), +5 (over the last 12 months)

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

Related audit firms

Network:

Total number of audit engagements across the network: 29

Latest audit engagements

These are this auditor's latest audit engagements.

Client Name	Client UID	Domicile	Start Date	Type of switch	Auditor Branch
Möbel-Transport AG	CHE-105.919.916	Schlieren	10.04.2026	Auditor switch	Zürich
MTJ Holding AG	CHE-101.614.694	Schlieren	10.04.2026	Auditor switch	Zürich
Temperatio-Stiftung	CHE-111.969.437	Zürich	07.04.2026	Auditor switch	Zürich
Kurt Keller AG	CHE-107.830.960	Zürich	26.03.2026	Auditor switch	Zürich
Noventura AG	CHE-109.878.452	Zug	17.11.2025	Auditor switch	Zürich

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 compagna conviva	CHE-373.026.959	Zürich	26.03.2026	Auditor switch	Zürich
Greater Zurich Area AG	CHE-101.003.674	Zürich	02.02.2026	Auditor switch	Zürich
PRO FILIA, Kantonalverein Zürich	CHE-114.490.941	Zürich	01.09.2025	Auditor switch	Zürich