Fresh off a successful Series C funding round in November, the South Korean fabless AI chip startup Rebellions has raised an additional $400 million. The latest funding infusion, which comes before a planned IPO later this year, was led by Mirae Asset Financial Group and the Korea National Growth Fund. It also comes at the same time that the company is engaging in an aggressive expansion effort — with recently announced plans to grow its presence not only in Asia but also in the Middle East and the U.S. Founded in 2020, Rebellions develops and designs AI chips while outsourcing their fabrication. The startup’s chips are designed for inference — the compute necessary for AI models to respond to user queries. Inference has grown in importance as LLMs have matured and begun to see widespread commercial deployment. The company closed $124 million in a Series B in 2024 . Then, in November, Rebellions raised an additional $250 million during its Series C.…