Vertiv, which makes the power and cooling systems that keep data centers from literally melting, has been one of the biggest winners. Other major data center stocks attracting trader attention include Digital Realty, carrying a market cap of around $66 billion, and Equinix at roughly $100 billion. Why the spending keeps acceleratingAI data centers are projected to consume up to 70% of global memory chips by 2026. Amazon and Alphabet alone account for a combined $375 billion to $385 billion of the projected capex. With AI data centers projected to consume 70% of global memory chips, any disruption to chip manufacturing could simultaneously hurt data center buildout timelines and spike component costs.