The news
Type One Energy, a fusion power startup based in Knoxville, Tennessee, announced on October 6, 2026 that it raised $200 million in a Series B round. Breakthrough Energy Ventures and Clutterbuck Capital co-led the round, and Lowercarbon Capital, Siemens Energy Ventures and SiteGround Capital also invested, according to TechCrunch and Reuters.
The company is developing a stellarator, a type of fusion machine that uses complex magnetic fields to hold superheated plasma, Reuters reported. Its plan, called Project Infinity, includes Infinity One, an engineering prototype, and Infinity Two, a 400-megawatt commercial power plant. Both are tied to the Tennessee Valley Authority's Bull Run site in East Tennessee. TechCrunch reported that Type One aims to have Infinity Two operating by 2034.
Type One is working with infrastructure consultant AECOM on engineering and with Commonwealth Fusion Systems, which supplies high-temperature superconducting magnets, according to TechCrunch. Reuters reported that Type One aims to partner with Siemens on manufacturing.
Chief executive Christofer Mowry told TechCrunch that the company plans to work as an integrator, designing plants and components while outsourcing manufacturing to specialist suppliers. He said that approach requires far less capital than building everything in house. He told Reuters the project is not an experimental science project and that the company wants to learn that its design "works as advertised."
Reuters, citing PitchBook data, reported that the round is the third-biggest Series B in the fusion sector over the last five years. Type One was founded in 2019, TechCrunch reported.
The numbers
- Series B
- $200 million
- Infinity Two capacity
- 400 megawatts
- Target operation
- 2034
- Founded
- 2019
Why CEOs should care
For energy buyers, especially companies building data centers, fusion is not a near-term supply option. A 2034 target means any contract would sit well beyond typical planning horizons, and first-of-a-kind plants often slip. Energy and sustainability leads should treat fusion as a long-dated option to monitor, while covering this decade's demand with grid power, renewables, storage, gas or fission.
For CFOs and boards, the business model is worth noting. Type One plans to design plants and outsource manufacturing, which Mowry says cuts the capital it must raise. That puts heavy weight on suppliers such as Commonwealth Fusion Systems for magnets and, per Reuters, Siemens for manufacturing. Investors and partners should ask how supply risk is shared and what milestones trigger the next round of funding.
For utilities and infrastructure firms, the TVA site matters. A utility-linked site gives the project a path to the grid, but questions remain on licensing, cost per megawatt-hour and who buys the power. Those are the details to request before making commitments.
The bigger picture
Rising electricity demand, much of it from AI data centers, has pushed investors toward long-horizon power bets, including fusion. Most fusion startups have pursued tokamaks, doughnut-shaped machines; stellarators use twisted magnet shapes that are harder to build but are designed to hold plasma more steadily. The round puts Type One among the better-funded fusion companies, though no fusion company has yet sold electricity to the grid.
What’s next
Watch for progress on the Infinity One prototype at Bull Run, any power purchase agreements tied to Infinity Two, and whether manufacturing partnerships with Siemens are formalized. Reported total funding figures differ between outlets, so look for the company to clarify its full capital raised.
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