Startorus Fusion

Startorus Fusion is a commercial nuclear fusion company founded in 2021 by former Tsinghua University researchers Chen Rui and Tan Yi, who recognized an inflection point where mature plasma physics could be commercialized into grid-scale clean energy. The company develops and operates spherical tokamak fusion reactors based on proprietary magnetic reconnection heating technology—a fundamentally different approach from traditional tokamak designs. Rather than maintaining continuous high-temperature plasma, Startorus employs repeated magnetic reconnection cycles analogous to internal combustion engines, dramatically reducing engineering complexity, reactor size, and construction cost. This innovation positions Startorus to commercialize fusion power faster and at lower capital intensity than conventional fusion routes, with engineering verification targeted for 2028 and commercial demonstration power output by 2032.

The company operates across three parallel development tracks. It currently runs SUNIST-2, a spherical tokamak that achieved first plasma in July 2023 and has since demonstrated plasma currents exceeding 220 killiamps and toroidal magnetic fields ranking third globally. Simultaneously, Startorus is constructing NTST (Negative Triangularity Spherical Tokamak), expected to be the world's first spherical tokamak with negative triangularity—a geometry expected to enhance plasma stability and confinement. These are stepping stones toward CTRFR-1, Startorus's next-generation high-temperature superconducting spherical tokamak designed to achieve net energy gain (Q≥1), proving the viability of its fusion scheme at engineering scale.

Startorus is backed by a consortium of Chinese institutional investors, government development funds, and international venture capital. The company raised a record-breaking 1 billion yuan Series A in January 2026—the largest single financing round for a private Chinese fusion company—signaling strong institutional confidence in both its technology and China's fusion commercialization timeline. With over 140 employees, predominantly PhD-holders from China's top research institutions, Startorus operates from bases in Xi'an and Shanghai, with strategic partnerships with Tsinghua University and the Chinese Academy of Sciences. The company has been recognized as a 2025 Forbes Asia 100 company, a 2025 MIT Technology Review Smart Company, and multiple innovation awards from the Chinese government. As global competition in commercial fusion accelerates, Startorus stands among the most advanced startups in the sector by technical milestone achievement and capital deployment.

Keywords: nuclear fusion, spherical tokamak, magnetic reconnection, clean energy, deep tech, commercial fusion, grid power, superconducting magnets, plasma physics, energy transition, Xi'an, Shanghai, venture capital.