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Rossi Management & Consulting Services AG 

Altendorf · Since 2021

Rossi Management & Consulting Services AG provides management consulting and board services and serves as the umbrella for the founder's advisory and management activities. The firm focuses on leadership, strategic issues and investment‑related advisory, drawing on experience from the banking sector.

S-A Isolierungen GmbH 

Altendorf · Since 2024

S-A Isolierungen GmbH provides technical insulation and fire-protection services for industrial, commercial and building-services applications. The company carries out ventilation and pipe insulation, VKF‑compliant fire-stopping and manufactures custom sheet-metal claddings in its own workshop, supporting projects from planning through completion.

Sandra Hartmann Fotografie 

Altendorf · Since 2023

The company provides photography services, particularly for creating memory photos, e.g. by booking shootings.

Sanjo Management AG 

Altendorf · Since 2024

Sanjo Management AG provides real estate services including development, property management, rental management and portfolio management. The company also offers sales, caretaker (building maintenance) services and digital solutions such as the Sanjo App.

Sanjo Immobilien AG 

Altendorf · Since 1998

Sanjo Immobilien AG provides services in property development, property management, rental management, sales, portfolio management and building caretaking. The company manages residential and commercial properties, handles project development and marketing, and performs administrative and technical facility management tasks.

Sanjo Liegenschaften AG 

Altendorf · Since 2013

Sanjo Liegenschaften AG carries out property development, construction-related projects and property management, and handles rental and sales listings for owners and tenants. Services include landlord administration, tenant support with digital tools and the development of residential projects with attention to ecological and energy-efficiency criteria.

schilter.tech GmbH 

Altendorf · Since 2022

The core activity of Schilter.tech GmbH is consulting, planning and implementing solutions for energy-efficient building envelopes, photovoltaic systems and climate-friendly building technology. The company supports building envelope manufacturers, architects and builders in implementing the Energy Strategy 2050.

Schunk Carbon Technology AG 

Altendorf · Since 1955

The company's core activity is the development, production and processing of carbon and silicon carbide materials, as well as the manufacture of components for various industries such as automotive, chemicals, pharmaceuticals, food, climate and power plant technology, aerospace and shipbuilding. This includes, in particular, the production of sealing and pump components, carbon brushes, brush systems, slip ring contacts, current collectors and other components for e-mobility and vehicles.

Schweizerischer Factoringverband (SFAV) 

Altendorf · Since 2004

The company's core activity is the provision of factoring services, in particular the assignment of monetary claims from goods deliveries and services, in order to provide companies with short-term revenue financing and protection against claim defaults.

Sena Estate Invest AG 

Altendorf · Since 2021

The core activity of Sena Estate Invest AG is real estate consulting and brokerage for yield-generating properties. Specifically, this includes the following services: purchase and sale of yield-generating properties, valuation and appraisal of yield-generating properties, strategy and real estate consulting, mandates and operational support for yield-generating properties. The company thus offers comprehensive services for investors and owners of yield-generating properties.

SGU IT Consulting Gubler 

Altendorf · Since 2016

The core activity of SGU IT Consulting Gubler is laboratory automation, implementation, maintenance and expansion of applications, particularly in the chemical and pharmaceutical industries. This includes the implementation, adaptation and maintenance of laboratory information systems (LIMS), electronic laboratory notebooks (ELN) and other systems, as well as the development of system and device interfaces, application servers and database infrastructures. The company also offers support and services for the digitization of work processes.

sihlschmied Eligius Grütter 

Altendorf · Since 2012

The core activity of the company "sihlschmied" is the provision of consulting and coaching services for private individuals, including supervision, intervision, team development and burnout prevention.

SilberBlau Invest AG 

Altendorf · Since 2009

The core activity of Silberblau Invest AG is the provision of business and financial advisory services to private and public companies in Europe and the Middle East. This includes the development, support and value enhancement of transactions such as buyouts, strategic partnerships and joint ventures, leading to long-term benefits and sustainable growth for clients. In addition, the company invests in start-ups and special projects to develop a diversified portfolio and achieve sustainable returns. The company's core activities also include providing consulting services to companies in the food, telecommunications, satellite communications, leisure and tourism, and renewable energy sectors.

Simone Lombard Fotografie GmbH 

Altendorf · Since 2024

The core activity of Simone Lombard is the provision of photography services, particularly in the areas of: Branding photography (product photography with a focus on authentic and elegant appearance), Architectural photography (photography of interiors, materials and forms with a focus on light and shadow), Event photography (photography of events with a focus on details and memorability), and People photography (photography of people with a focus on authentic and character-strong moments). Additionally, the company also offers post-production services to edit and optimize the photographed images.

Simpel Immobilien AG 

Altendorf · Since 2023

The core activity of Simpel Immobilien AG is the marketing of real estate, including services such as real estate valuation, real estate sales, real estate rentals and marketing of new construction projects. The company offers individual consulting, targeted marketing and professional support to interested parties in order to achieve its customers' goals.

sitEX Properties Holding AG 

Altendorf · Since 1962

The core activity of sitEX Properties Holding AG is the investment, development and management of real estate in Switzerland and the USA, particularly in the regions of Central Switzerland, Central Florida and Texas. The company focuses on identifying properties with potential for value appreciation, developing projects and achieving long-term value appreciation of its real estate portfolio.

sitEX Properties International AG 

Altendorf · Since 2011

sitEX Properties International AG is a real estate investment and development company that acquires, repositions and develops land and built assets to pursue value‑add project developments. Its portfolio includes master‑planned residential communities, residential and commercial properties and coworking concepts, and it collaborates with homebuilders and education partners.

Sjco Sütterlin Consulting AG 

Altendorf · Since 2004

The core activity of Sjco Sütterlin Consulting AG is conducting surveys, analyses and consulting services for companies from various industries, particularly in the healthcare and administration sectors. The surveys are carried out in various forms, including online surveys, written surveys and qualitative interviews. The results are analyzed and presented to customers in the form of presentations, workshops and consulting services.

SKE-Vital GmbH 

Altendorf · Since 2018

The core activity of SKE-Vital GmbH is the development, manufacture and distribution of dietary supplements and health products based on natural ingredients and produced according to strict quality standards. The company offers a wide range of products targeting various aspects of well-being, such as energy, performance enhancement, sleep, stress, skin, hair, nails, digestion and immune system.

Smart Gecko AG 

Altendorf · Since 2014

The company Smart Gecko AG provides consulting and training services in the areas of business analysis, project management, design thinking, and digital transformation. They support companies in developing strategies, improving processes, and training employees. Additionally, they also offer personal development and career planning.