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Single Family OfficePuts its own capital into companiesLAST VERIFIED Oct 2026 · 3 SOURCES

Schlossstein Capital

Zug-based investment company (Schlossstein Capital AG) investing in small and mid-size listed and private companies focused on environment and society, plus seed capital for founders.

USEFUL FOR Founders · Co-investors

Family & background

HEADQUARTERS
Zug, Switzerland
FOUNDED
2011

Investment approach

STAGES
Seed
ROUTES
Companies (own capital)
STRATEGIES
Direct investmentsPublic equitiesImpact

Overview

Schlossstein Capital AG is a Swiss stock corporation registered in the canton of Zug (CHE-198.665.525); GLEIF records its creation in July 2011. Its site says it invests in small to medium-sized listed or private companies that contribute to the environment and society, and provides seed capital to people starting businesses, guided by minimising negative externalities. Karl-Phillip Schlossstein is president of the board. The import placed it in West Bay, Cayman Islands; its own imprint and GLEIF give Zug, Switzerland.

Investment thesis

Invests in small to medium-size listed or private companies that strive to contribute to the future of the planet and society, with a focus on minimising negative externalities.

People

  • Karl-Phillip Schlossstein
    President of the Board of Directors · source

Frequently asked questions

Schlossstein Capital is a single family office based in Zug, Switzerland, founded in 2011.

Schlossstein Capital invests its own capital into companies. Its stated asset mix includes direct investments, public equities and impact.

Schlossstein Capital invests at Seed stage in Climate & Energy.

Key people at Schlossstein Capital include Karl-Phillip Schlossstein (President of the Board of Directors).