Finance & Insurance

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.

Windlin Holding AG 

Kerns · Since 2010

Windlin Holding AG is part of the Windlin group, which operates businesses for passenger cars and commercial vehicles and provides sales and workshop services. Offerings include new and used vehicle sales, repairs and maintenance, commercial vehicle rental, and additional services such as pickup/drop‑off service, tyre storage and professional vehicle care.

Windlin Leasing AG 

Kerns · Since 2000

Windlin Leasing AG is part of the Windlin Group, which sells, rents and services passenger cars and commercial vehicles. The company provides workshop, maintenance and service activities as well as vehicle financing solutions.

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.

Winterthur Consulting Group AG 

Winterthur · Since 2007

Winterthur Consulting Group AG is an independent advisory firm specialising in personal asset management and investment advice. Its services include rule‑based portfolio management (WCG:ROB), management of pension assets, portfolio analysis and consolidation, financial and legal advisory, and real‑estate financing. The firm holds an authorisation from the Swiss Financial Market Supervisory Authority (FINMA) and is overseen by the supervisory organisation OSFIN.

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.