Samsung Electronics Strike D-3: 40,000 Workers Set to Walk Out, Up to $20 Billion at Stake

Samsung Electronics' second-ever strike is three days away. More than 40,000 union members have pledged to walk out starting May 21 for 18 days. One day of semiconductor factory downtime could cost up to 1 trillion won ($667 million).

Samsung Electronics' largest union has set May 21, 2026 as the start date for an 18-day strike, with over 40,400 of 73,000 members signed up. When wage talks collapsed on May 13, the company's stock plunged as much as 6.09% intraday, erasing 99 trillion won (~$66 billion) in market value before recovering after government intervention.

Union Demands: 15% of Operating Profit as Bonuses, No Cap

The dispute centers on performance bonuses. The union wants Samsung to allocate 15% of operating profit to workers, abolish the current cap on bonus payouts, and formalize the bonus structure in a collective agreement. At a rally on April 23 that drew 40,000 workers, foundry production dropped 58% and memory production fell 18%, according to the union.

1 Trillion Won per Day. 30 Trillion Won for 18 Days.

"Just one day of suspension at Samsung Electronics' semiconductor factory is expected to incur direct losses of as much as 1 trillion won. What is more concerning is that a temporary pause on semiconductor manufacturing lines leads to months of inactivity."

Prime Minister Kim Min-seok

• One day semiconductor factory stop: up to 1 trillion won (~$667M) in direct losses
• Estimated 18-day strike cost: ~30 trillion won (~$20 billion)
• Samsung's share of South Korea's exports: 22.8%
• Samsung's share of KOSPI market cap: 26%
• Over 120,000 employees, 1,700 supplier companies

Government Options: Emergency Arbitration or Court Injunction

President Lee Jae Myung called for balance between labor rights and corporate management. The government is weighing two tools. The first is an emergency arbitration order under Article 76 of the Trade Union Act — a rarely-used measure that immediately suspends strike action for 30 days. It has only been invoked four times since 1969 and would be a significant step for a union-friendly administration.

The second is a court injunction. Samsung filed for a strike-restricting injunction at Suwon District Court, with a ruling expected before the May 21 walkout. If granted, it would freeze strike action until the main case is decided.

The union has said it will not yield to arbitration pressure and will strike rather than accept unfavorable terms. If the walkout proceeds as planned, the KOSPI and Korean won face immediate pressure. Samsung's stock has already seen elevated volatility as this risk has priced in.