China’s biggest IPO of 2026 signals chip race shift
China’s semiconductor push just gained momentum. SJ Semiconductor has officially gone public, raising around RMB 5 billion in what is now the largest IPO in China’s A-share market this year.
The listing on the Shanghai Stock Exchange STAR Market instantly pushed the company’s valuation to nearly RMB 140 billion, marking a major milestone for China’s domestic chip ecosystem.
Why this listing matters beyond funding
This IPO is not just about capital—it reflects a deeper shift in how China is building its semiconductor independence. The entire fundraising amount will be directed toward advanced chiplet packaging and 3D integration technologies, which are critical for next-generation AI and high-performance computing systems.
Unlike traditional chips, modern AI workloads demand multiple chips working together. That’s where advanced packaging—especially 2.5D and 3D integration—becomes essential. SJ Semiconductor is positioning itself right at the center of this transition.
From early breakthrough to dominant local player
SJ Semiconductor didn’t appear overnight. The company traces its roots to a joint effort involving SMIC and JCET, two major players in China’s chip manufacturing chain.
Within a short period after its formation, the company achieved something rare at the time—entering the 14nm process segment and supplying global clients like Qualcomm.
Today, it controls roughly 85% of China’s 2.5D packaging market and has carved out a noticeable presence globally. It also helped fill a long-standing gap in China’s ability to handle mid-end wafer processes such as bumping and wafer-level packaging.
Rapid growth—but with a hidden risk
The company’s financial trajectory has been steep. Revenue jumped from about RMB 1.6 billion in 2022 to over RMB 6.5 billion by 2025. Profitability also flipped dramatically, moving from losses into strong net earnings.
However, there’s a catch. A single major client now contributes more than 70% of its revenue, raising concerns about dependency. If that relationship weakens, it could directly impact future growth.
Competition heating up in advanced packaging
SJ Semiconductor’s lead in 2.5D packaging is significant—but not unchallenged.
JCET is rapidly scaling its chiplet-based solutions for AI workloads, while Tongfu Microelectronics is gaining ground through partnerships with global firms like AMD.
This means SJ Semiconductor’s early advantage may not remain secure for long, especially as AI demand accelerates innovation across the entire industry.
A broader signal in the global chip race
What makes this IPO unusual is its timing. While global chipmakers focus on cutting-edge fabrication, China is aggressively strengthening its packaging and integration capabilities—a critical but often overlooked part of the semiconductor value chain.
With AI driving demand for complex chip architectures, packaging companies like SJ Semiconductor are becoming just as important as chip designers and manufacturers.
And if current trends continue, this segment could define the next phase of the global semiconductor race.