Rebellions Raises $250 Million to Advance the Next Generation AI Infrastructure, Backed by Arm and Samsung

Series C funding backed by Arm and Samsung accelerates Rebellions’ chiplet-based AI roadmap and ability to deliver energy-efficient inference infrastructure at global scale

Seoul, South Korea — September 30, 2025 – Rebellions, Asia’s fastest-growing AI inference chip company, today announced it has raised $250 million in Series C round at a valuation of $1.4 billion — accelerating Rebellions’ roadmap for efficient, large-scale AI inference.

The round marked a significant milestone, securing Arm as a strategic partner to drive ongoing innovation for next-generation AI data center infrastructure. Additional support came from Samsung Ventures and Pegatron VC, strengthening strategic ties across the semiconductor and AI module ecosystem. Existing investors, including the Korea Development Bank and Korelya Capital, returned with follow-on investments, while new international investors, such as Lion X Ventures, also joined the round.

This investment will accelerate REBEL-Quad mass production and fuel the company’s expanded chiplet-based product roadmap designed to deliver energy-efficient yet powerful inference infrastructure for the world’s most demanding AI models.

The company’s first-generation chips, ATOM™ and ATOM™-Max, are already in mass-production and deployed with customers across Japan, Saudi Arabia, and the United States, and power Korea’s largest commercial AI service. In August, Rebellions introduced its second-generation REBEL-Quad, the world’s first UCIe-Advanced AI accelerator, built to deliver peta-scale inference with unmatched energy efficiency and scalability for next-generation data centers.

Rebellions also plans to expand its global presence in the United States, Europe, and key Asia-Pacific markets, supporting sovereign AI infrastructure initiatives and attracting leading talent in AI and semiconductors.

“As AI inference workloads continue to rise, the demand for AI chips is expanding significantly. This investment marks an important milestone in Rebellions’ journey from Korea’s national AI chip champion into Asia-Pacific’s leading AI chip startup. We are deeply grateful to our investors for their trust and confidence in our vision and potential”, said Sungkyue Shin, CFO of Rebellions.

About Rebellions

Rebellions is an AI semiconductor company powering the next generation of large-scale inference. Building on the proven mass production and deployment of its first-generation ATOM, Rebellions now delivers energy-efficient AI infrastructure at scale with its flagship REBEL-Quad, featuring chiplet architecture and 144GB HBM3E. Strengthened by strategic support from leaders across the semiconductor and AI infrastructure value chain, Rebellions is positioned to scale globally.