Advanced Micro Devices (AMD) crossed the USD 1 trillion market-capitalization milestone for the first time, marking another major moment for the semiconductor industry as investors increase their focus on artificial intelligence infrastructure.
The company’s shares surged to a record high during trading on September 21. Reuters reported that AMD shares were up about 9.6% at USD 613.50, briefly pushing its valuation above USD 1 trillion.
The milestone puts AMD in a small group of US semiconductor companies valued at more than USD 1 trillion. It is the fourth US chipmaker to cross the threshold after Nvidia, Broadcom and Micron.
AMD's latest rally also highlights the broader strength of semiconductor stocks. The Philadelphia Semiconductor Index gained around 2.7% during Monday's session, while Intel and Qualcomm also recorded sharp gains.
The strategy allows AMD to compete more directly with Nvidia in the rapidly expanding AI infrastructure market. At the same time, demand for CPUs used alongside GPUs in data centers helped AMD gain market share from Intel.
Investors are also watching the increasing computing requirements of AI workloads. The expansion of AI applications is driving demand for data-center processors and accelerators, creating opportunities for chipmakers across multiple parts of the technology stack.
AMD's latest milestone follows a sharp rise in its stock this year. Reuters reported that the company's shares climbed roughly 185% in 2026, significantly outpacing the Nasdaq's gain of about 15.8% over the same period.
The rally continued despite AMD recently forecasting quarterly revenue above Wall Street estimates but falling short of some elevated investor expectations. The stock nevertheless gained more than 26% after that setback, according to Reuters.
The latest market move shows how strongly investors are linking semiconductor valuations to future AI infrastructure spending. AMD's ability to convert that interest into sustained revenue and earnings growth will remain a key focus for the market.
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