Hartmann Capital — 2025 Investments
5 investments dated 2025 · listed companies and verified rows first · show all
Billy Bets builds AI-based market making technology for sports prediction markets.
AI & Machine LearningFintechSports Tech
Joseph O'Rourke(Founder)in
Co-investorsCoinbase Ventures
Mentra builds smart glasses hardware, an open-source operating system (MentraOS), and developer tools for deploying applications on smart glasses.
AI & Machine LearningConsumerDeveloper ToolsEnterprise SoftwareHardwareSan Francisco, US
Cayden Pierce(CEO)inAlexander Israelov(Founder)inJhillika Kumar(Founder)
Co-investorsToyota VenturesAlumni VenturesOlive Tree CapitalPioneerTIRTA VenturesTranspose Platform Management+12 more
Mentra is a talent-matching platform that connects neurodivergent individuals with employers, aiming to match candidates to careers based on their skills, work ethic, personality, and workplace preferences.
EdTechFuture of WorkHR TechImpact & Social Good
Jhillika Kumar(Founder)in
Co-investorsCharlotte FundMPG FundShine CapitalVerissimo VenturesAlexa FundDAVID APPLE+5 more
PlaySafe ID provides gamers with an anonymised, verified identity that ties bans to the individual rather than a single game account, preventing caught cheaters from returning under new accounts.
CybersecurityGaming
Co-investorsEarly Game VenturesOverwolf
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.














