SK Hynix Inc. reported a 62% jump in profit and revealed it’s sold its entire memory chip lineup for next year, illustrating how a global AI infrastructure buildout is ratcheting up sector-wide demand.

The top supplier of high-bandwidth memory to Nvidia Corp. plans to devote far more capital toward ramping up capacity next year, racing to expand output to ride the unprecedented spending led by industry leaders from OpenAI to Meta Platforms Inc. SK Hynix will begin supplying next-generation HBM4 components to customers this quarter, shifting to full-fledged sales in 2026.

SK Hynix offers investors an early glimpse into the rapidly expanding AI infrastructure sphere, ahead of earnings this week by sector linchpins including Meta and Amazon.com Inc. The Korean company’s partnership with Nvi

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