Samsung-backed AI chip firm Rebellions raises $400 million ahead of IPO

Rebellions, a South Korean startup specializing in AI chips, has successfully raised $400 million in funding as it sets its sights on expanding into the U.S. market in anticipation of an initial public offering (IPO). The investment round was spearheaded by Mirae Asset Financial Group and the Korea National Growth Fund, a state-backed investment initiative, which collectively value Rebellions at an impressive $2.34 billion. The surge in demand for AI chips has created a competitive landscape for semiconductor startups, and Rebellions aims to capitalize on this trend. CEO Sunghyun Park shared with CNBC that the newly acquired funds will be directed towards engaging major laboratories, specifically targeting companies like Meta and xAI, rather than larger cloud service providers such as Amazon and Microsoft. Park confirmed that Rebellions is currently conducting several proof-of-concept trials with clients in the U.S. With an eye on the IPO, details remain scarce regarding the timing and location of the listing. Rebellions' chips primarily focus on inferencing—the execution of AI applications—rather than training them. While Nvidia's GPUs have dominated the training sector, there is a growing need for chips that can efficiently handle inferencing tasks. Rebellions markets server systems that utilize its Rebel100 NPU chips and faces competition not only from Nvidia but also from a host of emerging companies like Cerebras and Groq. Park emphasized the unique edge of their chips, boasting significantly higher energy efficiency and performance for inferencing tasks compared to rivals. Although the company has not disclosed specific sales figures, Park mentioned a robust revenue pipeline. However, securing a steady supply of memory chips poses a challenge, as these components are in high demand and limited supply, causing prices to soar. "Memory is not very easy to get. But our demand is so huge," Park noted. Fortunately for Rebellions, being backed by major memory producers like Samsung and SK Hynix positions them advantageously in the supply chain. This funding round aligns with the South Korean government's broader strategy to bolster the domestic semiconductor industry, underscored by the launch of the "K-Nvidia" initiative aimed at investing in advanced AI chip development. The Korea National Growth Fund contributed 250 billion Korean won (approximately $166 million) to this recent funding effort, reinforcing the government's commitment to the sector. Alongside these investors, oil giant Aramco is also part of Rebellions' growing support network.