Centinela copper mine strike ends after unions ratify new agreement with Antofagasta Minerals
Workers at Chile’s Centinela copper mine, represented by two unions, have ratified a new collective bargaining agreement with Antofagasta Minerals, ending a 10-day strike. The agreement, approved by 94.49% of participating workers, resolves demands for equal benefits across unions and highlights the impact of labor disputes on global commodity markets.
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30 SEC SUMMARY
- Workers at Chile’s Centinela copper mine, represented by two unions, ratified a new collective bargaining agreement with Antofagasta Minerals, ending a 10-day strike.
- The strike began on October 7 after contract negotiations broke down, involving over 700 union members.
- The agreement was approved by 94.49% of participating workers, resolving demands for equal benefits across unions.
- Antofagasta Minerals reported normal production levels during the strike, which produced 240,400 metric tons of copper in 2025.
- The strike contributed to supporting global copper prices amid supply concerns.
TABLE OF CONTENTS
KEY HIGHLIGHTS
- The strike at Centinela copper mine began on October 7 after contract negotiations collapsed, involving over 700 union members.
- The new collective bargaining agreement was ratified by 94.49% of participating workers, ending the strike on October 17.
- Workers demanded equal benefits for all union members, regardless of their union affiliation.
- Antofagasta Minerals maintained normal production levels during the strike, which produced 240,400 metric tons of copper in 2025.
- The strike, along with the risk of a supervisors' strike at BHP’s Escondida mine, supported global copper prices.
Strike ends with overwhelming worker approval
According to Mint, workers from two unions at the Centinela copper mine in Chile ratified a new collective bargaining agreement with Antofagasta Minerals, ending a strike that began on October 7. The agreement was approved by 94.49% of participating workers, signaling strong support for the deal.
The strike involved over 700 union members and followed the breakdown of contract negotiations. Workers had demanded equal benefits regardless of their union affiliation.
Production unaffected during strike
Antofagasta Minerals reported that normal production levels were maintained throughout the strike. The Centinela mine produced 240,400 metric tons of copper in 2025, underscoring its significance in the global supply chain.
During the strike, three workers reportedly undertook a hunger strike to pressure both sides into reaching a resolution.
Impact on global copper prices
The strike at Centinela, along with the risk of a supervisors' strike at BHP’s Escondida mine, contributed to supporting global copper prices. Analysts suggest that labor disruptions in major mines can create supply concerns, even when production levels remain stable.
What this means
Lazyfounder analysis — our interpretation, not reported fact.
For founders and operators in resource-dependent industries, this strike underscores the fragility of labor relations and its potential ripple effects on global markets. Even when companies maintain production, labor disputes can create volatility in commodity prices, disrupting supply chains and investor confidence. The high approval rate for the agreement at Centinela also demonstrates that well-structured negotiations can lead to swift resolutions, reducing the risk of prolonged disruptions.
For startups operating in sectors with strong union presence, this case highlights the importance of proactive labor strategies. Contingency planning, transparent communication, and equitable benefit structures can help mitigate risks and foster long-term stability.
Key takeaways
- Labor strikes in critical industries like mining can disrupt operations but may not always halt production if companies have contingency plans.
- High worker approval rates for agreements signal strong collective bargaining outcomes and reduced risk of prolonged disputes.
- Global commodity markets remain sensitive to labor disruptions, even when production levels are maintained.
- Founders and operators in resource-dependent industries should prioritize proactive labor relations to mitigate supply chain risks.
FAQ
Why did the strike at Centinela mine begin?
The strike began on October 7 after contract negotiations between the unions and Antofagasta Minerals broke down. Workers demanded equal benefits for all union members, regardless of their affiliation.
How did the strike affect production at Centinela mine?
Antofagasta Minerals reported that normal production levels were maintained during the strike. The mine produced 240,400 metric tons of copper in 2025.
What role did the strike play in global copper prices?
The strike, along with the risk of a supervisors' strike at BHP’s Escondida mine, contributed to supporting global copper prices by creating supply concerns.
Related on Lazyfounder
Sources
- Mint (Technology) · 2026-10-18
Antofagastas Centinela strike ends after deal with unions
This story is an original summary drafted with AI by Lazyfounder from the reporting listed above and checked by automated validation. Facts are attributed to their original publishers; sections marked as analysis are Lazyfounder's. Where a source is in another language, facts were machine-translated and quotations are reported, not reproduced. Read the original coverage via the links, and see our AI policy and corrections policy.
About the author
Editor, Lazyfounder
Tarun Mottlia edits LazyFounders, covering Indian startups, funding rounds, AI and product launches. Every story on the site is AI-assisted and checked against its cited sources before publication.
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