Chinese artificial intelligence startup StepFun is reportedly finalizing a massive $2.5 billion pre-IPO funding round, a move that would mark the largest single fundraise by a large language model (LLM) company in China to date. The round, which is heavily backed by hardware supply chain investors and the Hong Kong Investment Corporation (HKIC), underscores the shifting dynamics of AI funding in the region and the increasing integration of software and hardware ecosystems.
According to reports from BigGo Finance and 36Kr, the funding round is being led by a consortium of major players in the consumer electronics and semiconductor supply chains, including Huaqin Technology, Longcheer Technology, OmniVision, and ZTE. The participation of the HKIC, Hong Kong’s sovereign wealth fund, further highlights the strategic importance of the deal and aligns with StepFun’s recent corporate restructuring.
The Hardware Connection
The prominent role of hardware manufacturers in this funding round is a significant departure from traditional venture capital-led investments. It reflects a growing recognition that the next phase of AI adoption will be driven by edge computing and on-device inference. By aligning with companies like Huaqin and Longcheer, which manufacture millions of smartphones, tablets, and IoT devices annually, StepFun is positioning its models to be deeply integrated into the next generation of consumer hardware.
This strategy is particularly relevant given the increasing focus on agentic AI and embodied intelligence. As we noted in our coverage of Volkswagen’s deployment of agentic AI at the edge, the ability to run powerful models locally, without relying on constant cloud connectivity, is becoming a critical competitive advantage. StepFun’s partnership with hardware giants suggests a concerted effort to optimize its models for these constrained environments.
Restructuring for Hong Kong
The HKIC’s involvement is closely tied to StepFun’s recent corporate maneuvers. As we reported in April, StepFun unwound its Cayman Islands Variable Interest Entity (VIE) structure in preparation for a potential initial public offering (IPO) in Hong Kong. This move was seen as a strategic pivot away from U.S. capital markets, which have become increasingly hostile to Chinese tech firms due to geopolitical tensions and regulatory scrutiny.
The $2.5 billion pre-IPO round provides StepFun with the necessary capital to scale its operations and compute infrastructure ahead of a public listing. It also serves as a strong vote of confidence from both state-backed entities and key industry players. The successful completion of this round would likely accelerate the company’s IPO timeline, potentially setting the stage for a blockbuster debut on the Hong Kong Stock Exchange later this year or early next.
The “Big Five” at a Crossroads
StepFun’s massive fundraise is part of a broader surge in capital flowing into China’s top AI labs. The week of May 7-8 saw an unprecedented concentration of mega-rounds, with DeepSeek reportedly securing a $50 billion valuation and Moonshot AI nearing a $2 billion round.
This funding frenzy highlights the intense competition among China’s “Big Five” LLM startups (which also includes Zhipu AI and MiniMax) as they race to secure the compute resources and talent needed to compete at the frontier. The reported 500 million yuan ($69 million) in revenue generated by StepFun in 2025 demonstrates that these companies are beginning to translate their technological capabilities into significant commercial traction.
However, the scale of these investments underscores the immense costs of training and deploying state-of-the-art models. StepFun’s upcoming Step 3 model, rumored to be a 321-billion parameter Mixture-of-Experts (MoE) architecture, will require massive computational power. The $2.5 billion injection will be crucial in securing the necessary hardware, particularly given the ongoing constraints imposed by U.S. export controls.
Competing at the Frontier
The capital injection will be critical for StepFun to maintain its competitive position. The company’s flagship model, Step 3, is rumored to be a 321-billion parameter Mixture-of-Experts (MoE) architecture, a design that requires enormous amounts of compute to train and serve at scale. The MoE approach, which activates only a subset of parameters for each query, has proven highly efficient, a key advantage given the ongoing constraints imposed by U.S. export controls on advanced semiconductors.
StepFun’s founder, Jiang Daxin, has consistently positioned the company as a serious contender for the top tier of global AI development. The company’s reported 500 million yuan ($69 million) in revenue for 2025 demonstrates that this ambition is backed by genuine commercial traction rather than just benchmark performance. The $2.5 billion round will allow StepFun to significantly expand its GPU cluster, accelerate data curation efforts, and deepen its hardware partnerships.
Looking Ahead
As StepFun finalizes this historic funding round, the company is well-positioned to solidify its status as a top contender in China’s AI ecosystem. The strategic alignment with hardware manufacturers provides a clear path to widespread deployment, while the backing of the HKIC offers a stable foundation for its anticipated public market debut.
The success of StepFun and its peers in navigating the complex geopolitical and economic landscape will have profound implications for the future of global AI development. As the center of gravity for AI funding and innovation continues to shift, the upcoming Hong Kong IPOs of these tech giants will be closely watched by investors and policymakers worldwide. The StepFun round, if it closes at $2.5 billion, will set a new benchmark for what is possible in China’s private AI market and a powerful signal to global investors that the country’s LLM sector has reached a new level of maturity.