Samsung Electronics and SK Hynix plan $646B investment package in semiconductor expansion

Samsung Electronics and SK Hynix are set to announce a combined investment package worth $646 billion, a staggering commitment to semiconductor production that underscores just how seriously South Korea is taking the AI chip race.

The investment, expected to be formally unveiled on Monday, centers on building out a second major chip cluster in South Korea.

The AI chip arms race accelerates

Demand for semiconductors, particularly the high-bandwidth memory (HBM) chips that power AI workloads, has been described by South Korean officials as “exponential and explosive.”

That demand has been so intense that it’s reshaping corporate hierarchies. SK Hynix recently surpassed its larger rival as South Korea’s most valuable listed company with a market capitalization of approximately $1.35 trillion. SK Hynix dominates the HBM market that Nvidia and other AI chip designers desperately need.

SK Hynix had already tipped its hand in February 2026, announcing a dedicated $15 billion investment in new semiconductor facilities.

The new facilities target completion by 2034-2035, which represents a dramatic acceleration from earlier projections that had penciled in a 2044 timeline.

South Korea’s semiconductor strategy takes shape

Previous iterations of the plan had estimated total long-term investments at around $471 billion, with approximately $261 billion in private funding, stretching through 2047. The new $646 billion figure suggests the scope has expanded considerably as AI demand projections have grown.

Samsung and SK Hynix together hold a dominant share of the global HBM market, the segment of memory chips specifically designed for the massive parallel processing that AI models require.

What this means for investors

SK Hynix’s ascent to South Korea’s most valuable company reflects a market repricing that values HBM expertise above Samsung’s far more diversified business, which spans smartphones, displays, and consumer electronics.

The risk, of course, is cyclicality. The 2034-2035 target completion date means these facilities will need AI demand to remain robust for the better part of a decade. Investors should watch whether these commitments come with government backstops or whether Samsung and SK Hynix are shouldering the capital risk alone.

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