Audit Firms

Get detailed statistics about any audit firm in Switzerland. Just type the auditor name in the field below and off you go!

Fact Sheet a&o kreston audit ag

Core Company Information

Company Name	a&o kreston audit ag
UID	CHE-102.312.698
Alternative / previous Names	a&o kreston audit sa, a&o kreston audit ltd a&o KRESTON ortag ag, a&o KRESTON ortag sa, a&o KRESTON ortag ltd (until 03.07.2019) ORTAG AG, ORTAG SA, ORTAG Ltd (until 02.11.2016) Ortag, Organisations-, Revisions- und Treuhand-AG, Ortag, Société Fiduciaire d'Organisation et de Révision SA, Ortag, Organising, Accounting and Trust Company Ltd (until 16.01.2012)
Domicile	Zürich
Canton	ZH
Legal Form	Limited corporation
Firm Inscription Date	27.07.1955
Website	http://www.ao-kreston.ch
Phone	+41 44 457 22 22
Takeovers:	Confia Zürich AG (CHE-106.193.814), per 01.12.2021 Confia Baden AG (CHE-108.378.017), per 01.12.2021

FAOA Information

FAOA ID	500250
RAB Permission	licensed audit expert
FAOA License	active (since 19.10.2007)
Link to FAOA website	View auditor profile at FAOA
Branch offices (0)	-
Membership in Associations	EXPERTsuisse
Number of auditors with permission	5 (38.20 audit engagements per employee on average)

Auditor Statistics

Average engagement duration: 10.1 years (max.: 31.6 years)

Total number of statutory audit engagements: 191 (Ranked #53 in Switzerland)

Change in number of audit engagements: -2 (since 31.12.2023), +9 (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	GE	GR	LU	NW	SG	SH	SO	SZ	TI	VD	VS	ZG	ZH	∑
Limited corporation	24	3	5		2	1	7	2	3	5		2	5	7	1	8	69	144
Limited liability company	1			1							1	3				2	6	14
Foundation	6		1	1			1	1		3						1	14	28
Cooperative							2											2
Association	2																1	3
∑	33	3	6	2	2	1	10	3	3	8	1	5	5	7	1	11	90	191

This audit firm is recorded as statutory auditor for 67 deleted entities. These are not included in the table above.

Display client list

Related audit firms

Network:

Fiduciaire Favre Révision SA (CHE-114.002.069), 274 audit engagements
Fiduciaire Michel Favre SA (CHE-106.853.674), 0 audit engagements

Total number of audit engagements across the network: 465

Direct personal relationship:

Audit Suisse AG (CHE-112.451.953), 134 audit engagements

Further connections:

Fehlmann Alfred, Treuhand (CHE-114.609.099), 0 audit engagements
A & O Treuhand- und Wirtschaftsprüfung GmbH (CHE-105.060.719), 0 audit engagements
AB Activ-Treuhand GmbH (CHE-109.452.053), 0 audit engagements
Panarex Revisions + Treuhand AG (CHE-103.756.767), 37 audit engagements
AML Revisions AG (CHE-393.273.320), 20 audit engagements
OGH expertises comptables et fiscales SA (CHE-102.169.082), 99 audit engagements
Küng Treuhand AG (CHE-102.520.535), 74 audit engagements
Tschumi + Partner Revisions AG (CHE-107.882.141), 12 audit engagements
PLURIAUDIT SA (CHE-107.952.155), 122 audit engagements
Bösch & Rinderer Revisions AG (CHE-110.468.003), 40 audit engagements
ASMA Asset Management Audit & Compliance SA (CHE-139.920.633), 28 audit engagements
Fidusafe SA (CHE-109.373.519), 24 audit engagements
Auditam Fiduciaire Michaël Amsellem (CHE-110.079.742), 7 audit engagements
Fidesma Audit Sàrl (CHE-285.703.335), 13 audit engagements
Argo Consilium AG (CHE-106.829.049), 89 audit engagements
Treuhand von Flüe AG (CHE-103.184.894), 29 audit engagements
Scheidegger Treuhand (CHE-107.398.460), 0 audit engagements
Rocky Treuhand AG (CHE-109.084.676), 19 audit engagements
ORFA Audit SA (CHE-101.585.153), 105 audit engagements
FISTRA AG (CHE-103.445.178), 24 audit engagements
Swiss Revision AG (CHE-106.512.871), 20 audit engagements
Confides AG (CHE-107.604.642), 48 audit engagements
Hehlen Treuhand AG (CHE-107.779.649), 45 audit engagements
bepartner ag (CHE-108.067.818), 61 audit engagements
JURISAUDIT AG (CHE-114.623.136), 72 audit engagements
A.V.E. Finanz GmbH (CHE-105.018.290), 0 audit engagements
Lie Audit GmbH (CHE-109.893.368), 0 audit engagements
GFA Gesellschaft für Abschlussrevisionen AG (CHE-102.189.593), 48 audit engagements
Theilacker Treuhand AG (CHE-103.397.740), 0 audit engagements
Immo123 AG (CHE-104.928.976), 0 audit engagements
Gemperli-Treuhand AG Sarnen (CHE-107.912.457), 0 audit engagements
Aricon Treuhand AG (CHE-108.677.313), 0 audit engagements
AREVA Allgemeine Revisions- und Treuhand Aktiengesellschaft, Vaduz (LI), Zweigniederlassung Buchs SG (CHE-392.246.846), 8 audit engagements

Latest audit engagements

These are this auditor's latest audit engagements.

Client Name	Client UID	Domicile	Start Date	Type of switch	Auditor Branch
Timeout Gastro & Event GmbH	CHE-382.193.763	Wollerau	28.02.2024	First auditor	Zürich
Granovit SA	CHE-105.950.398	Lucens	24.01.2024	Auditor switch	Zürich
GfA Gruppe für Architektur GmbH	CHE-113.034.440	Zürich	18.01.2024	First auditor	Zürich
Herlock Insights AG	CHE-398.948.585	Zürich	08.12.2023	First auditor	Zürich
Zimmermann Technik AG	CHE-102.670.382	Luzern	30.10.2023	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
Vassalli Service AG	CHE-105.837.916	Opfikon	17.04.2024	Auditor switch	Zürich
ZEKI GASTRO AG	CHE-106.111.638	Zürich	16.04.2024	Discontinued	Zürich
LCL Gastro AG in Liquidation	CHE-131.740.524	Zürich	14.03.2024	Discontinued	Zürich
Inmobiliaria Lomas AG	CHE-102.266.437	Zug	01.02.2024	Opting-out	Zürich
Kempf Innenausbau AG	CHE-448.853.753	Arni (AG)	12.01.2024	Opting-out	Zürich