AMD has crossed a $1 trillion market capitalisation for the first time. Shares rose about 9.6 percent on Monday, September 21, to $613.31, a record high that pushed the chipmaker past the trillion-dollar mark. That makes AMD the latest semiconductor company to reach the milestone on the back of the AI infrastructure build-out; the stock is up roughly 185 percent so far in 2026.
The jump marks a deeper change in what AMD is. For years it was the value challenger in the shadow of Intel and Nvidia; today its valuation hangs on data-centre hardware for AI. In July the company unveiled Helios, its first rack-scale system, alongside the MI400 GPUs, with Microsoft named as a customer. Days later it said it would invest up to $5 billion in Anthropic, paving the way for two gigawatts of GPU compute. In the second quarter, data-centre revenue doubled.
Analysts stayed bullish too: on Friday, Bank of America raised its price target to $720 from $620. AMD closed Friday at $630.59, up 0.2 percent.
One driver was the competition itself. Reports that Beijing may allow ByteDance and Alibaba to buy Nvidia's new RTX Pro 5500 knocked Chinese chip stocks down — while U.S. semiconductor names such as AMD benefited from the prospect of tight supply and sustained AI demand. The open question for AMD is whether the market believes it can close Nvidia's lead in AI training, or whether the trillion is mainly a bet on second place in inference.
