First Fellow Partners (Risto Siilasmaa Family Office) is a family office - single based in Helsinki, Finland, founded in 2016. Verified contact details, AUM data, and investment preferences on FindLPs.
First Fellow Partners is a private investment firm built on a founder-first philosophy. We invest only our own capital, backing bold, mission-driven technology entrepreneurs from idea to lasting impact.
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LP firm data compiled from public regulatory filings (SEC Form ADV, FCA, AIFMD disclosures), company websites and press releases, LinkedIn public profiles, and verified outbound email testing. AUM figures reflect self-reported values from filings and may lag by 1–2 fiscal quarters; bands are normalized in USD. We do not publish personal residential information; firms or individuals may request removal at /contact. Methodology & sources · Updated July 2026.