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SolarImpact Yacht AG 

Zurich · Since 2006

The company Solar Impact develops and manufactures innovative yachts, in particular the Solar Impact SWATH Yacht, which is based on renewable energy. The core activity of the company lies in the design, production and marketing of solar-powered luxury yachts.

Solenthaler + Vieira Bau GmbH 

Zurich · Since 2023

Solenthaler + Vieira Bau GmbH is a construction company specializing in renovations, refurbishments, and consulting. The core activities include: Renovations: quick and precise renovations with cost control, Refurbishments: renovation of buildings with innovative approaches and tailored solutions, Consulting: support for construction projects and reliable partnership. The company thus offers a comprehensive range of services in the construction sector, from planning and consulting to the execution of renovations and refurbishments.

Sonanini Bau AG 

Zurich · Since 2022

Sonanini Bau AG is the general contractor within the WS Refolio Group and executes construction projects for Walter Sonanini AG and third parties. The company carries out building projects combining design focus and technical expertise, covering planning and execution with attention to quality, schedule and functionality.

Sound Development AG 

Zurich · Since 2002

Sound Development AG is a recording studio and production facility offering mixing capabilities, a control room with professional monitoring, a vocal booth and multiple flexible recording spaces, including a large live room and a basement club/concert area.

Spectris AG 

Zurich · Since 2024

Spectris AG provides high‑tech instruments, test equipment and software for technically demanding industrial applications. The group includes businesses such as Malvern Panalytical, Particle Measuring Systems, Servomex and HBK.

SPitch AG 

Zurich · Since 2014

SPitch AG develops an omnichannel conversational AI platform for enterprises, offering modular products such as Virtual Assistant (voice and text), Speech Analytics, Voice Biometrics, Knowledge Agent, Chat Platform, Agent Assist, Agent Training and Quality Management. The company also provides professional services, strategic consulting and integrations with contact centre, CRM and cloud platforms.

Spitex Herzenssache GmbH 

Zurich · Since 2021

The core activity of Spitex Herzenssache GmbH is the provision of care and support services, particularly in the areas of psychosocial and somatic care, Long Covid & ME/CFS, care for caregiving relatives, and individualized care and support solutions.

SSI Services AG 

Zurich · Since 2022

The core activity of SSI Wealth Management AG is wealth management and consulting for private clients. This includes services such as: Asset Management, Depot Check, Investment Consulting, Discretionary Asset Management, Estate and Pension Planning, as well as Trust and Fiduciary Services, Tax Consulting and Real Estate Management. The company thus offers a comprehensive range of financial services to achieve its clients' wealth goals.

STAHLER. Immobilien AG 

Zurich · Since 2021

STAHLER. Immobilien AG is active in real‑estate development and real‑estate investments. The company develops residential and commercial properties as well as hotels and acts as a long‑term investor, with projects including the Schlotterbeck Areal and developments in Barcelona.

Stark & Cie. SA 

Zurich · Since 2020

The company's core activity consists of three main areas: 1. **Design and Creation**: The company provides design services to support customers in developing market-ready products and creating a unique brand identity. 2. **Consulting**: The company offers consulting services to help customers integrate design thinking into their business strategy and foster a culture of innovation. 3. **Investments**: The company invests in companies that offer innovative and luxurious products or services and share the company's values. The investments are driven by a close relationship between the company and the founders.