Editor’s note: This article is republished from Jumpstart, a TechNode Group publication.
Sinomags is approaching a Hong Kong IPO with two measures of its position: first among Chinese magnetic sensor companies, and tenth globally, with a 0.6% market share. Both rankings are based on 2025 revenue, according to Frost & Sullivan data cited in the company’s post-hearing information pack, a draft listing document published in September.
The Anhui-based manufacturer published the document after its listing hearing. Its pitch to investors rests on a business that has assembled chip design, wafer manufacturing and sensor modules across China and Germany, secured a stronger position in particular technologies, and recently become profitable.
The proposed listing would help finance its next move: expanding precision sensors for applications including robotics, while upgrading the German manufacturing capability it acquired five years ago. For Sinomags, becoming more consequential globally will require turning those accumulated capabilities into a larger, more profitable business.
Magnetic sensors give machines information they cannot obtain simply by looking. They measure electrical current, detect position and track movement. Inside a solar inverter, a current sensor helps monitor electricity flowing through the system. Inside a robot joint, a magnetic encoder helps determine where the joint is and how it is moving.
These are small components with demanding jobs. Their value depends on producing reliable measurements repeatedly, under the conditions in which a customer’s equipment actually operates.
From Magnetic Research to Industrial Scale
Sinomags built its business around that requirement. Its roots go back to Ningbo in 2013, with a founding team drawn from magnetic materials and electronics research. Wang Jianguo brought together researchers including Mao Sining and Bai Jianmin, developing a company whose commercial progress depended on translating expertise in magnetism into components manufacturers could use.
Solar power and electric vehicles provided early routes to volume. By 2025, current sensors generated 82.6% of revenue. That business gave Sinomags scale, customers and manufacturing experience, while also tying its performance closely to demand in energy and automotive markets.
Its technology positions are stronger than its overall market share suggests. In the same 2025 rankings, Sinomags placed second globally in tunnelling magnetoresistance, or TMR, sensors, with a 4.7% share, and fourth in current sensors, with 3.3%.
TMR is one of several magnetoresistive technologies, collectively called xMR, that use changes in electrical resistance to detect magnetic fields. Sinomags works across this family. Its position in TMR gives it a foothold in a particular part of the market from which to expand.
Buying the Missing Manufacturing Piece
A decisive step came in 2021, when it acquired Germany’s Sensitec.
Founded in 1999, Sensitec brought experience in precision magnetic sensing and, crucially, wafer manufacturing. The acquisition helped Sinomags connect the development of sensor chips with the processes used to manufacture them, then package them into products for customers.
That is the substance behind its integrated device manufacturer, or IDM, model. Owning more of the production chain gives the company greater control over how a design becomes a working component: the magnetic materials, wafer processes, chip characteristics and module assembly all affect the result.
Sensitec also gave the group an established European business. The German company retained its name after the acquisition and added Sinomags’ current-sensor portfolio to its European offering. The combination paired a growing Chinese current-sensor business with German capabilities in measuring position and movement.
Growth Brings Its Own Pressures
The financial results show that the combined business is gaining traction. Revenue rose from RMB594.2 million in 2023 to RMB845.3 million in 2025. A RMB66.6 million loss became a RMB9.9 million profit in 2024, followed by RMB52.6 million in 2025. In the first five months of 2026, profit reached RMB47.9 million on revenue of RMB418.7 million.
Gross margin improved to 28% in that latest period, from 18% in 2023. Yet the average selling price across the portfolio fell from RMB7.16 to RMB4.91, reflecting changes in the products and sales mix. Sinomags is earning more while selling a much larger number of lower-priced units on average.
That makes the composition of growth central to its IPO story. Higher volumes have strengthened the business, but expanding into more demanding sensing applications offers another route to increasing the value it captures.
Customer concentration adds pressure. Its five largest customers account for more than half of revenue, and the largest contributed 26.2% in the first five months of 2026. A relatively small group of buyers therefore has considerable influence over the company’s sales trajectory.
The listing documents also expose a sharp intellectual-property dispute. A Chinese magnetic-sensor competitor challenged 25 Sinomags patents. Twenty were declared invalid, two partly invalid and three upheld.
Sinomags disclosed that it was still contesting some decisions. The company says the disputed patents cover peripheral features and that it protects its most valuable technologies as trade secrets.
Sinomags says these include material preparation methods, temperature profiles, trimming parameters, testing data and customised equipment. These are the accumulated details that determine whether a sensor can be produced consistently at commercial scale.
Revenue associated with products incorporating the disputed patents fell from 12% of the total in 2023 to 0.1% in the first five months of 2026. The commercial exposure has narrowed considerably. The dispute nevertheless puts a useful question before prospective shareholders: how much of Sinomags’ advantage lies in enforceable intellectual property, and how much resides in manufacturing knowledge that must remain inside the company?
An IPO to Fund the Next Move
Its next expansion will put that knowledge to work in a different revenue mix.
Robotics creates demand for precise measurements of position and movement. AI infrastructure adds opportunities in power monitoring and related components. For Sinomags, these markets extend from capabilities it already has, although current sensors remain the business paying most of the bills.
The proposed use of IPO proceeds makes the robotics ambition tangible. Sinomags plans to build a research and production base in Wuxi with maximum designed annual capacity of 38 million high-precision magnetic sensors. Construction began in the first half of 2026, with operations expected to start in the first half of 2027.
Its existing motion-sensor module capacity is concentrated in Wetzlar, Germany, at 6.5 million units annually as of May 2026. The new Chinese facility would bring more production closer to domestic customers and expand the group’s ability to serve robotics, automotive and industrial applications.
There is a revealing detail behind the investment. Sinomags’ current-sensor lines in Bengbu and Ningbo have spare capacity, but their equipment and processes cannot readily be converted to motion-sensor production. Moving into the next market requires another manufacturing commitment.
The company also intends to use proceeds to upgrade its German wafer line from five-inch to eight-inch production. The acquisition that helped complete its manufacturing chain now needs fresh investment to improve efficiency and support further product development.
That gives the Hong Kong IPO a clear place in Sinomags’ development. Research created its technical foundation. Energy and automotive customers gave it commercial scale. Sensitec added manufacturing depth. Public-market funding would support the next attempt to turn those pieces into a broader precision-sensing business.
China’s largest magnetic-sensor company has established a place in the industry. Its IPO asks investors to finance the journey from that domestic position toward greater global weight. The factories it builds, the products customers adopt and the margins those products earn will determine how far its 0.6% can grow.