Daily Highlights: Key Venture Market Deals
- Valar Atomics closed a $1 billion Series B round led by Sequoia Capital at a valuation of $6 billion—plus a $200 million credit line;
- Base Power raised $1 billion in its Series D round at a valuation of $13 billion, tripling its value in ten months;
- Nvidia is investing around $5 billion in the Safe Superintelligence lab founded by Ilya Sutskever;
- HappyRobot entered the unicorn club after a $150 million Series C round with a valuation of $1.2 billion;
- Antora Energy received $550 million in Series C funding for the development of thermal batteries for industry.
Valar Atomics: Atomic Reactor as a Serial Product
The largest deal of the week is the $1 billion Series B round for startup Valar Atomics, led by Sequoia Capital at a valuation of $6 billion. The three-year-old company, developing small modular reactors with helium cooling, has tripled its valuation in just a few months: in April 2026, following a $450 million round, it was valued at $2 billion. The syndicate included Valor Equity Partners, Point72, Atreides Management, Conviction, HOF Capital, and others, with Sequoia partner Sean Maguire taking a seat on the board. Additionally, the company closed a $200 million credit line, with Erebor Bank, J.P. Morgan, Crescent Cove, and Hercules Capital acting as administrative agents.
The catalyst for this round was a technological breakthrough: the Ward 250 reactor became the first reactor in U.S. history built by a startup to directly power an Nvidia Blackwell computing cluster. Valar Atomics now aims to transition from demonstrations to serial production of reactors based on a factory model—with its own nuclear fuel line and vertically integrated supply chain. For venture funds, this represents a bet on removing a significant bottleneck in the AI economy: the waiting lists for connections to the U.S. power grid have exceeded 2,600 gigawatts, with wait times reaching four to five years.
Base Power: $13 Billion for Distributed Energy
The second energy mega-round was closed by Austin-based Base Power, raising $1 billion in its Series D with a post-investment valuation of $13 billion. The round was led by Ribbit, Addition, Valor Equity Partners, and the strategic investment arm of JPMorgan Chase, with participation from Altimeter, Coatue, D1 Capital, Sands Capital, and Energy Impact Partners. Thrive Capital, Andreessen Horowitz, Lightspeed, and CapitalG also reinvested in this round. In total, the company has raised over $2.5 billion in less than three years.
The valuation growth is impressive even against the backdrop of AI rounds: $4 billion in October 2025 and $13 billion in August 2026. Simultaneously with the round, Base Power introduced Base Core—a 39.2 kWh home battery of its own design, aimed at supporting the energy grid. Investors are effectively financing the construction of a "distributed power plant" made up of thousands of home energy storage units—a model that adds power to the grid faster and cheaper than traditional generation.
Nvidia and Safe Superintelligence: Strategic Capital Over Classic Venture
A landmark deal at the end of July, setting the tone for August, was Nvidia's investment of around $5 billion in Safe Superintelligence—a lab co-founded by Ilya Sutskever of OpenAI. This partnership will provide SSI access to the Vera Rubin platform and enable it to increase its computing capacity tenfold within the next twelve months. Notably, the lab has yet to release a commercial product—capital is being raised solely for the research program.
For the venture community, this deal illustrates a structural shift: chip manufacturers and cloud giants are becoming the largest capital providers in late-stage funding, displacing traditional funds from the most expensive finance rounds.
HappyRobot: New Unicorn in Agency AI
San Francisco-based HappyRobot raised $150 million in its Series C round led by Prysm Capital and Eurazeo, achieving a valuation of $1.2 billion. Existing investors include a16z, Base10, and...
