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Walser Zumbrunn Wäckerli Architektur GmbH 

Winterthur · Since 2004

WZW Architektur is an architectural firm specializing in the planning and design of buildings and spaces.

Webbaumeister GmbH 

Winterthur · Since 2013

The core activity of Webbaumeister GmbH is the creation and maintenance of websites, search engine optimization, graphic solutions and other products for the internet and print, particularly with the content management system Contao. The company also offers consulting and support services to its customers and positions itself as a partner for small and medium-sized enterprises as well as start-ups in Switzerland.

Weber + Schweizer Immobilien-Treuhand AG 

Winterthur · Since 1999

The core activity of Weber + Schweizer is real estate management, including consulting, administration, sales and marketing of real estate, particularly in the areas of condominium ownership and rental properties.

Wicki Architekt 

Winterthur · Since 2013

Wicki Architekt is an architectural practice led by Martin Wicki, Architect ETH SIA. The practice provides architectural design and project planning services for renovations, residential buildings, roof conversions and the preparation of competition entries.

WINTEC Engineering AG 

Winterthur · Since 2018

WINTEC Engineering AG is an engineering office for building services that provides consulting, design and implementation services in the HVAC and sanitary sectors. Its offerings include energy consulting, project management, BIM process consulting and optimisation of building services systems.

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.

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.

ZIO AG, Zweigniederlassung Winterthur 

Winterthur · Since 2019

ZIO AG, Zweigniederlassung Winterthur provides integrative assessment, treatment and care for cancer and blood disorders. The centre combines conventional and complementary medical approaches within an interdisciplinary team to develop individual treatment plans, offering diagnostics, medical tumour therapy and supportive services such as exercise and nutrition therapy, specialist consultations and second opinions.

Zylinderschleifwerk Winterthur AG 

Winterthur · Since 1950

The core activity of Zylinderschleifwerk Winterthur AG is the precision machining of parts and the manufacture of components through various services such as superfinish surfaces, cylindrical grinding, repairs, surface coatings and complete manufacturing. The company focuses on meeting customer expectations through precise and high-quality machining of parts and components.

Erpse Institut AG 

Winterthur · Since 2024

The core activity of erpse is nutrition consulting and education, particularly through the training of experts in preventive and sports nutrition as well as the application of knowledge in consulting practice. The company offers consulting packages and online educational services (erpse-academy.com) that focus on the topics of nutrition, training, physiology, medicine, psychology, and mindfulness.