Global Economy — 2026-05-20

Over 45000 Samsung Workers Threaten 18-Day Strike Over AI Chip Profits Risking Global Memory Supply

BLUFAbsent emergency arbitration before Thursday, the walkout will likely cripple the chokepoint supplier for HBM4, leaving AI hyperscalers without a substitute through the 18-day stoppage.

South Korea's National Labor Relations Commission chairman told reporters Tuesday the two sides were narrowing differences but had not reached a deal, with a planned 18-day strike by some 45,000 to 47,000 Samsung workers set to begin Thursday 12. The union demands 15% of annual operating profit in bonuses with the existing salary cap removed; Samsung offered 10% plus one-time special compensation per Yonhap via CNBC, while Fortune separately reported a management counter of approximately 13% as a one-time payment 23. South Korean Prime Minister Kim Min-seok warned Sunday of possible emergency arbitration under national labor law to suspend the strike, and a Seoul court Monday partially granted Samsung's request to require minimum staffing at some facilities during any industrial action 12.

Analysis
Corroborated across four outlets with high confidence, the strike will likely begin Thursday, idling the dominant node in the global HBM supply chain when Samsung's entire 2026 HBM4 production run is already committed and hyperscalers hold no ready alternative. The partial injunction requiring minimum staffing narrows but does not eliminate the risk; April data set the bounds: memory output fell 18% and foundry throughput halved in a single affected shift. A deal remains possible only if Samsung's co-CEO makes the personal appearance the union set as a precondition, with emergency arbitration, available but untriggered as of Tuesday, representing Seoul's remaining lever. Procurement managers at HBM-dependent firms should activate contingency sourcing immediately and expect sustained premiums through the remainder of 2026.

4 sources