A few companies define each decade.
We back them.
Thirdbase Capital is a global private markets firm investing in the growth-stage leaders of frontier AI, defense, energy, robotics and more. We concentrate where capital, timing and conviction converge, through direct rounds, structured entries and the early managers who see what’s coming before the rest of the market does.
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Strategy
We concentrate. Most of our capital goes into a handful of companies we have spent years understanding. A smaller share goes earlier, into the managers and founders who show us what’s coming next.
Capital and beyond
Direct Investments
Capital committed at the moments that define a company.
Strategic Access
Bespoke transactions that open a seat in companies long past their last open round.
Emerging Managers
Early capital with the people who see the next cohort first.
Co-Invest Platform
Invest with Conviction
We believe collaboration amplifies outcomes. Our co-investment platform allows aligned investors to participate alongside us in specific, high-conviction opportunities built around transparency, focus, and long-term partnership.
Over the years, we’ve completed more than 30 collaborative investments with our network of global investors.