Fiduciary Offices

werkegroup keller 

Teufen Ar · Since 2022

WertSchöpf GmbH 

Fahrwangen · Since 2015

The core activity of WertSchöpf GmbH Treuhand is the provision of trust services, particularly in the areas of: Financial administration (accounting, financial reporting, debt collection), Company formations (incorporation of GmbHs and AGs), Personnel administration (employment contracts, payroll accounting, outsourcing of accounting), Taxes (tax returns, tax assessments, appeals), Financial statement consulting, and Interim management (representations, emergency deployments). The company offers these services to both businesses and private individuals, positioning itself as a competent partner for trust services.

WildbachPartner AG 

Zurich · Since 2006

The core activity of WildbachPartner AG is independent consulting in the areas of succession planning, real estate and taxes.

Willi Consulting GmbH 

Lucerne · Since 2014

Willi Consulting GmbH provides fiduciary and financial services to small and medium-sized enterprises, including bookkeeping, tax and VAT advisory and social insurance administration. Services also include company formation, restructurings, interim management and mandates as board or foundation member.

winstr AG 

Zurich · Since 2019

The core activity of winstr AG is the provision of tax consulting and trust services for international and Swiss clients, in particular companies and entrepreneurs.

Wipf Treuhand & Unternehmensberatung 

Wolfhalden · Since 2017

Wipf Treuhand & Unternehmensberatung provides fiduciary, tax and business consulting services. Offerings include accounting and financial management (bookkeeping, closings, VAT, payroll administration), tax returns and tax advice, corporate governance and strategy consulting, process optimization, company formation/restructuring, property management, VBA-based software solutions and assistance with matrimonial and inheritance law matters.

Wira Concept Sàrl 

Sion · Since 2008

Wira Concept Sàrl is a fiduciary firm providing accounting, tax and advisory services, including payroll processing, financial administration and company domiciliation.

witreva & Thalmann Treuhand AG 

Winterthur · Since 2021

The company provides comprehensive services in the areas of auditing, corporate consulting, financial and accounting, human resources and payroll, tax consulting, as well as outsourcing and administration. The core activity of the company lies in advising and supporting companies, organizations, and private individuals in these areas, with a focus on optimizing business processes, creating financial and accounting processes, managing trust mandates, and conducting audits.

witreva treuhand- und revisionsgesellschaft ag 

Wil Sg · Since 1998

The core activity of witreva treuhand- und revisionsgesellschaft ag is the provision of services in the field of classical trust business, including accounting, human resources, company formation, succession planning, taxes, auditing and consulting, as well as digitalization. The company provides its clients with comprehensive support in their business and tax matters, with a focus on SMEs, associations, foundations and private individuals.

OVIOUS Treuhand GmbH 

Herzogenbuchsee · Since 2025

OVIOUS Treuhand GmbH provides accounting, tax and fiduciary services, including bookkeeping, payroll, year‑end accounts and tax returns. The firm also offers company formation and liquidation support, transaction and valuation assistance, and digital processing with integration of software such as Bexio and Infoniqa.

Witus Treuhand AG 

Lucerne · Since 2020

The core activity of Witus Treuhand AG is the provision of trust services, including auditing, real estate management, corporate consulting and tax consulting for private individuals and companies.

Zähner Treuhand AG 

Scherzingen · Since 1980

The core activity of Zähner Treuhand AG is the provision of fiduciary services, including: accounting, payroll and personnel administration, taxes, business start-ups, inheritance divisions, and corporate consulting. The company offers these services to private individuals, SMEs, cooperatives, foundations, and other organizations.

Zanuco Treuhand AG 

Steinhausen · Since 2018

The core activity of Zanuco Treuhand AG is the provision of trust services, particularly in the areas of accounting, tax consulting, and real estate management. This includes, among other things: accounting services, such as taking over accounting tasks, preparing annual financial statements, and supporting financial planning; tax consulting and preparation of tax returns for private and business clients; real estate management and consulting, including taking over accounting tasks for property owners; and consulting services for companies, particularly in the areas of strategy development, corporate consulting, and risk management. The company serves private and business clients, particularly small and medium-sized enterprises, property owners, and start-up companies.

Zeha Treuhand GmbH 

Stetten Ag · Since 2009

The core activity of ZEHA Treuhand GmbH includes: * Accounting and payroll accounting for private and business clients * Tax consulting and preparation of tax returns * Real estate management, including property management and sale of properties * Construction administration The company thus provides services in the areas of trust, taxes and real estate.

ZEOH GmbH 

Baar · Since 2022

ZEOH GmbH provides company formation, domiciliation, representation and corporate administration services. Its services include flat-fee incorporation packages, provision of “c/o” addresses or leased business addresses for legal domicile, appointment of Swiss-resident representatives or fiduciary managers, and handling of registration, compliance and administrative matters with referrals for accounting and auditing as needed.

ZEOH LTD, London, Zweigniederlassung Baar 

Baar · Since 2018

ZEOH LTD, London, Zweigniederlassung Baar provides corporate services for establishing and managing companies in Switzerland, including incorporation, domiciliation, legal representation and corporate administration.

ZOSSO CONSULTING 

Thalwil · Since 2002

The core activity of Zosso Consulting is general management consulting, particularly in the healthcare sector, as well as the creation of targeted planning and control instruments for companies.

Zufida Beratungs AG 

Lachen Sz · Since 2006

The core activity of Zufida Beratungs AG is the provision of services in the areas of tax consulting, trust, business consulting and accounting for SMEs and private individuals.

Zumstein Treuhand 

Rheinfelden · Since 1978

The core activity of "Zumstein Treuhand" is the provision of services in the areas of corporate consulting, accounting, and administration. Specifically, this includes: accounting with EDV for SMEs, company valuations, corporate restructuring, creation of business plans, contract management (creation of contracts such as loan and credit agreements, franchise agreements, etc.), personnel administration (payroll and salary calculations), and corporate consulting (advice on company formations, liquidations, changes in the board of directors, etc.). The company thus offers a comprehensive range of services for businesses to support them in their administration, accounting, and strategic decision-making.

Zurbrügg Treuhand & Beratung AG 

Aeschi B. Spiez · Since 1989

The core activity of the company 'Zurbrügg Treuhand & Beratung AG' is the provision of services in the field of real estate management, particularly the sale and rental of real estate, as well as consulting and supporting companies and private individuals in matters of financing, accounting and tax returns.