Moonstone

Moonstone invests at the pre-seed and seed stages in startups addressing planetary health—encompassing climate, human health, and enabling deep tech. The firm has publicly committed to a concentrated portfolio of up to 60 companies. It selects founders within a two-week process, then provides capital and network access while maintaining a hands-off operational posture.

Moonstone's public materials describe a lead or co-lead role in early-stage rounds. The firm positions itself as a primary capital partner rather than a passive co-investor. Its concentrated portfolio aligns with taking meaningful ownership stakes in each startup.

Moonstone's portfolio is exclusively built around planetary-health themes—ClimateTech, Healthcare, DeepTech, and digital tools serving those domains. There is no evidence of investments in consumer internet, enterprise SaaS, fintech, or media unrelated to its core thesis.

Moonstone operates as an asset manager focused on private equity. Its public presence—a fund website without named principals or disclosed ownership—suggests a traditional fund structure rather than a family office.

Moonstone invests across Europe without a single-country mandate. Its public portfolio includes companies headquartered in Italy, France, Germany, Spain, Norway, Portugal, Sweden, and the United Kingdom. The firm accepts applications regardless of the founder's location.