For most investors, Nvidia, along with Micron, AMD, and Broadcom, has become the face of the artificial-intelligence boom, but the AI supply chain stretches far beyond Silicon Valley.
Across Europe, a group of largely overlooked companies supplying critical hardware for AI data centres have emerged as some of the biggest stock-market winners of 2026.
Europe's AI potential
Europe may not have produced an AI champion on the scale of Nvidia, Microsoft or OpenAI. Instead, it is home to a growing ecosystem of companies supplying the infrastructure that makes artificial intelligence possible: the lasers that move data between GPUs, the substrates that connect advanced chips, the servers that train models and the testing equipment that validates processors before they leave the factory.
As spending on AI data centres accelerates, these companies have quietly become some of the world's biggest stock-market winners. Several shares have climbed by hundreds of percent this year, while one has surged more than 2,200%.
