Linde plc — AI supply-chain exposure

Linde is the world's largest industrial-gas company, and one of the quiet utilities underneath chip manufacturing. It supplies the ultra-high-purity gases a leading-edge fab consumes continuously — nitrogen, oxygen, argon, hydrogen, neon and specialty gases such as silane and nitrogen trifluoride — to the fabs that make AI silicon, including those run by TSMC, Samsung and Intel. As racks grow hotter it also feeds the other end of the chain, supplying liquid nitrogen and carbon dioxide for data-centre cooling.

The structural hook is the contract, not the molecule. Linde typically embeds itself on-site under long-term deals, building and running the gas plant next to the fab — an arrangement that is sticky, hard to second-source and consumed every day production runs. That makes it a picks-and-shovels supplier exposed to the whole industry's output rather than any single chip. The model places it here because leading-edge fabrication cannot run without a steady, pure gas supply, and few firms deliver it at that scale.