Notebook
Billion Dollar Month
Giant companies raise $1BN in December - ending an extraordinary year
By Tommy Stadlen
t was an extraordinary end to 2025 for Giant’s portfolio founders. Together, they raised $1 billion in December alone. They’re building companies that truly matter, from new nuclear to AI-powered material discovery.
As we prepare to launch our next vintage of funds, there is conviction here at Giant House that we are in the early days of a century-defining moment. The foundational systems of civilization are being rebuilt from scratch. We approach our task with humility and discipline, but also a belief that pioneering, purpose-led technology matters more than ever.
Our transatlantic portfolio achieved major milestones this quarter:
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Radiant raised $300m+ at a valuation over $1.8 billion to deliver abundant, clean and safe power. They'll perform the first fueled test of a new nuclear design in 50 years this spring with the US government. Giant doubled down from our Growth fund. Co-investors include a16z and Founders Fund.
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CuspAI was ranked Europe's number one AI company by the Financial Times’ Sifted. It aims to unlock trillion-dollar material breakthroughs in months, not millennia. Cusp landed major commercial partners from semiconductors to auto, attracting significant investor demand.
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Giant led Haven Energy’s $40M Series B, with participation from Lerer Hippeau, to rebuild America's power system. Haven is on track to deploy 100MW of distributed energy capacity for utilities this year, with over $70 million of projects already in the pipeline.
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Elvy - like Haven, a Giant incubation - announced €500M to offer affordable, monthly renewable power subscriptions for European homes. Each new customer contributes to a more resilient grid.
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Cambridge AI spinout Matta raised $14M to power sentient factories with its manufacturing foundation models.
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Syre partnered with Nike in a multi-year agreement to bring Syre’s textile-to-textile recycled polyester into Nike's core performance lines, and Synonym partnered with Brenntag - the largest chemical distributor in the world.
The next chapter will be written by founders who are bold enough to rebuild the world’s core systems, and contrarian enough to question what a civilization-level jump would look like. We are proud to stand beside them.
