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Sunsay NRG Suisse AG 

Zug · Since 2024

Sunsay NRG Suisse AG develops, constructs and operates photovoltaic and energy storage systems and delivers turnkey solar projects. The company provides project development, construction, operational management and advisory services for institutional, commercial and private investors, covering site assessment, permitting and ongoing monitoring.

Sun Valley Investments AG 

Zug · Since 2011

Sun Valley Investments AG is a private investment firm focused on the precious and critical metals mining industry. It invests across the metals supply chain—from exploration and development to production, processing and refining—and provides financing solutions including equity, offtake finance and downstream services such as bullion sales and storage programs.

Superstellar GmbH 

Zug · Since 2024

Superstellar GmbH develops AI systems for organizational intelligence that determine whether work is aligned with strategic goals. The company offers Serge, an AI execution-intelligence platform for engineering teams that automatically ingests project-management tool data and maps completed work to objectives.

Supertrends AG 

Zug · Since 2019

The core activity of Supertrends AG is to help companies and individuals navigate a world of information overload and understand innovations that can impact their business models. To this end, Supertrends offers services such as SmartScans, which enable the efficient extraction and analysis of relevant information to make informed decisions. The company focuses on providing tailored insights to help businesses succeed in a rapidly changing world.

Surgmed GmbH 

Zug · Since 2001

The core activity of Surgmed GmbH is the distribution of allografts and bone bank systems for the clinical sector in Switzerland. The company offers a comprehensive portfolio of allograft products, including maxgraft-ortho, application aids for drill hole filling, and the Marburg bone bank system. These products are intended for operative surgery, orthopedics, trauma surgery, and the dental sector.

suruchin AG 

Zug · Since 2020

The core activity of suruchin AG is the management and coordination of a family's personal investments and activities as a Single Family Office. This includes in particular: investments in Venture Capital, investments in Private Equity, investments in Real Estate, and advisory services in these areas. The company also supports and promotes various other activities and interests of the family, such as the support of art and music, the promotion of leaders, and the development of personal potential.

Susanne Sandor, Private Residence Management GmbH 

Zug · Since 2007

Susanne Sandor, Private Residence Management GmbH provides private residence management and concierge services, including cleaning, laundry, interior decoration, private-chef dinners, shopping and limousine services, repairs, and staff placement. Services are arranged individually and the website cites discretion, punctuality and quality as guiding principles.

Sustain for Life Switzerland Foundation 

Zug · Since 2011

Sustain for Life Switzerland Foundation is a charitable foundation that funds projects to reduce poverty by supporting activities that enable people to develop sustainable livelihoods. It focuses on education, sustainable agriculture and health, awards grants to registered NGOs and community-based organisations, and requires sustainability and clear exit strategies for supported projects. The website states that the founder covers core administrative costs so donations are directed to projects.

Sustain Holding AG 

Zug · Since 2012

The core activity of Sustain Holding AG is the sustainable development and support of technology companies within a family-owned group. The companies are supported through synergies within the group and receive their software development expertise from the mesoneer office in Ho Chi Minh, Vietnam.

Sutro Software GmbH 

Zug · Since 2024

Sutro Software GmbH develops Siterise, a management application for OpenText Customer Experience Management (CEM) installations, providing a syntax‑highlighted source editor, compare and merge tools, configuration management, centralized log viewing and back‑end analytics.