Infineon Finally Topples Its Millennium Record as AI Power Demand and a Rival’s Forecast Ignite the Rally

Infineon hits all-time high of €87.84 as AI power semiconductor demand surges, analyst upgrades, and patent victory boost outlook.

After 26 years, the ceiling has shattered. Infineon’s stock punched through its historic all-time high of €82.75 from June 2000 on Tuesday, closing at €87.84 — a 8.46% surge that rewrites a psychological barrier that defined a generation of investors. The catalyst came from two corners: a competitor’s blockbuster upgrade and an analyst’s pen.

STMicroelectronics lit the fuse by more than doubling its full-year revenue forecast for the data-centre business to around $1 billion, a clear admission that the hunger for power semiconductors in AI server racks is galloping faster than even optimistic models had predicted. Infineon, a leading supplier of high-efficiency power conversion directly at the server rack, is the natural beneficiary. Jefferies responded by hoisting its price target from €75 to €96, keeping a “Buy” rating and flagging rising capacity and demand for power management through the 2026/2027 fiscal year. The brokerage’s earnings estimates now stand more than 10% above the current market consensus.

Adding to the tailwind, a patent victory tightened Infineon’s grip on the gallium?nitride (GaN) arena. The US International Trade Commission upheld an import ban on certain GaN components from rival Innoscience, a decision that fortifies Infineon’s technological moat. Meanwhile, the European “Moore4Power” project, backed with €91 million, is pushing the next generation of silicon?carbide and GaN power electronics — a strategic bet that aligns with the company’s long?term roadmap.

The rally has already more than doubled the stock this year, lifting the year?to?date gain to 129%. Yet the higher the climb, the steeper the fall if expectations overshoot. Every quarterly report from here must justify that pace. Investors will get their next update on August 5, when Infineon reveals third?quarter results. Before that, the PCIM Europe trade fair in Nuremberg from June 9 to 11 offers a platform for new product announcements in energy infrastructure, AI power supply, and electromobility — areas where Infineon aims to showcase its edge.

Operationally, the July launch of the new Smart Power Fab in Dresden is on schedule, a facility designed to absorb the swelling demand for chips that manage electricity in everything from servers to cars. The combination of a favourable patent ruling, a soaring addressable market, and capacity expansion gives the stock a trio of props that look sturdy for now. But the market’s mood is fickle: defensive names across the DAX are being abandoned as growth stories soak up capital, and Infineon, as the index’s star performer, must keep delivering the goods to avoid being caught in a rotation the other way.