Princeton's Thea Energy raises $100M Series B for fusion startup
Original: With a new $100M raise, Princeton’s Thea Energy is now a top-funded fusion startup
Why This Matters
Positions Thea among top-funded fusion startups with novel magnet technology approach
Thea Energy secured an oversubscribed $100 million Series B led by U.S. Innovative Technology Fund, bringing total funding to $130 million. The Princeton-based fusion startup will use funds to expand magnet manufacturing and build its Eos demonstration reactor starting next year.
Thea Energy raised $100 million in Series B funding led by U.S. Innovative Technology Fund, following a $20 million Series A in early 2024. The company develops stellarator fusion reactors using unique pixel-like rectangular magnets that can be software-controlled to create complex magnetic fields within simpler physical structures. This approach aims to reduce manufacturing complexity compared to traditional stellarator designs. Thea plans to complete its Eos demonstration reactor by 2030 and launch commercial Helios reactors by 2034, competing with Commonwealth Fusion Systems' early 2030s timeline. The startup has built dozens of full-scale magnet iterations in its Jersey City lab, potentially offering manufacturing advantages over competitors requiring massive assembly facilities.