Daily Highlights: Key Venture Market Deals
- Valar Atomics closed a $1 billion Series B round led by Sequoia Capital, valued at $6 billion – plus a $200 million credit line;
- Base Power raised $1 billion in Series D funding, valuing the company at $13 billion, tripling its worth in just ten months;
- Nvidia invests approximately $5 billion in the Safe Superintelligence lab of Ilya Sutskever;
- HappyRobot enters the unicorn club after a $150 million Series C round, achieving a valuation of $1.2 billion;
- Antora Energy secured $550 million in Series C funding for the development of thermal batteries for industrial applications.
Valar Atomics: Nuclear Reactor as a Serial Product
The largest deal of the week is Valar Atomics' $1 billion Series B round led by Sequoia Capital, with a valuation of $6 billion. This three-year-old company, which develops small modular reactors cooled by helium, 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 other funds, with Sequoia partner Sean Maguire joining the board of directors. Additionally, the company closed a $200 million credit line, with Erebor Bank acting as the administrative agent alongside J.P. Morgan, Crescent Cove, and Hercules Capital.
The catalyst for this round was a technological breakthrough: the Ward 250 reactor became the first U.S. reactor ever built by a startup to directly power an Nvidia Blackwell computing cluster. Now, Valar Atomics plans to shift from demonstrations to serial production of reactors using a factory model – complete with its own nuclear fuel line and vertically integrated supply chain. For venture capitalists, this represents a bet on alleviating the primary bottleneck in the AI economy: the queues for connecting to U.S. power grids have exceeded 2,600 gigawatts, with waiting times reaching four to five years.
Base Power: $13 Billion for Distributed Energy
The second mega round in energy was closed by Austin-based Base Power — $1 billion in Series D funding at 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; additional participation came from Altimeter, Coatue, D1 Capital, Sands Capital, and Energy Impact Partners, while Thrive Capital, Andreessen Horowitz, Lightspeed, and CapitalG reinvested. The total capital raised by the company has surpassed $2.5 billion in less than three years.
The valuation trajectory 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 home battery with a capacity of 39.2 kWh designed to support the energy grid. Investors are, in effect, financing the construction of a "distributed power plant" made up of thousands of home 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 from late July that sets the tone for August was Nvidia's investment of approximately $5 billion in Safe Superintelligence — a lab co-founded by Ilya Sutskever of OpenAI. The partnership will grant SSI access to the Vera Rubin platform and increase computational power tenfold over the next twelve months. Notably, the lab has yet to release a single commercial product — capital is raised exclusively for its research program.
For the venture community, this transaction illustrates a structural shift: chip manufacturers and cloud giants are becoming the largest providers of late-stage capital, displacing traditional funds from the most expensive funding rounds.
HappyRobot: A New Unicorn in Agency AI
San Francisco-based HappyRobot raised $150 million in a Series C round led by Prysm Capital and Eurazeo, achieving a valuation of $1.2 billion. Existing investors include a16z, Base10, and...
