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Adéle Koller-Knüsli-Stiftung 

Winterthur · Since 1927

The core activity of the Adele Koller-Knüsli Foundation is the promotion of social projects and institutions in the Winterthur area, in particular through the provision of contributions and donations to individuals and organizations active in the Winterthur area.

A&E Gipsergeschäft GmbH 

Winterthur · Since 2016

The core activity of A&E Gipsergeschäft GmbH is the execution of plastering work, drywall construction and thermal insulation for new buildings and renovations. This includes in particular: exterior thermal insulation, fire protection measures, ceiling claddings, lightweight walls, plastering work (e.g. plastering work in interior areas) and painting work (e.g. exterior painting for facades). The company also offers consulting, planning and execution of construction projects and places emphasis on meeting the highest quality standards.

AGROLA AG 

Winterthur · Since 1967

The core activity of AGROLA includes the provision of energy products and services, in particular: * Sale of diesel, heating oil and other fuels * Installation and operation of petrol stations and charging stations for electric mobility * Distribution of wood pellets as a renewable energy source * Provision of services such as tank cleaning, ash disposal and warehouse monitoring * Sale of electricity and solar energy solutions * Development and operation of hydrogen technology and filling stations. The company positions itself as a comprehensive energy provider with a broad portfolio of products and services for private and business customers.

Agro-Office AG 

Winterthur · Since 1992

The company's core activity is the development, maintenance and provision of software solutions for financial accounting, particularly for agricultural businesses and SMEs, including features such as e-banking, invoicing, account reconciliation and payroll accounting.

AICHINGER SCHWEIZ GmbH 

Winterthur · Since 2013

AICHINGER SCHWEIZ GmbH provides shopfitting and retail furnishing services with a focus on refrigerated display furniture and fresh‑food presentation. The company offers consulting, design and project planning, manufacturing, construction coordination and service, and supplies products such as the SIRIUS® range and the ECOplus energy‑efficient line.

Allgemeine Plakatgesellschaft AG, Zweigniederlassung in Winterthur 

Winterthur · Since 1999

Allgemeine Plakatgesellschaft AG, Zweigniederlassung in Winterthur markets poster and digital out-of-home advertising spaces and provides services for planning and booking outdoor advertising campaigns. The branch offers online tools such as a product finder and booking platform and manages advertising spaces on behalf of property owners.

AM Media AG 

Winterthur · Since 2012

AM Media AG is a digital and advertising agency providing brand development, advertising, web development, e‑commerce and performance marketing services. Its offering includes strategy, design, content production, SEO/SEM, analytics and AI-based solutions for process and marketing automation.

Anlagestiftung Winterthur für Personalvorsorge (AWI) 

Winterthur · Since 1984

The company's core activity is the management of investment groups for pension funds and the selection and monitoring of asset managers on behalf of these investors. The company offers various investment solutions, including real estate and indexed investment groups, and supports its investors in implementing their investment strategies.

Aquilegia Im Garten Zuhause GmbH 

Winterthur · Since 2014

The company operates a plant center, offering plants and garden specialties. It also provides services in the field of garden design.

Arthur Weber AG, Zweigniederlassung Winterthur 

Winterthur · Since 2018

Arthur Weber AG, Zweigniederlassung Winterthur is a service and trading company offering a broad range of construction products and services. Its business areas include building technology, steel services, building services, supply systems, energy technology and metal roofing/roof sheet work; the branch also operates an online shop and provides delivery and emergency services.