Southern Copper Director Files Form 144 Notice to Sell 400 Shares ($87K)

Executive Summary

On September 1, 2026, Luis Miguel Palomino Bonilla, a Director of Southern Copper Corp (NYSE: SCCO), filed a Form 144 notice proposing to sell 400 shares of common stock with an aggregate market value of $87,000 through broker Inteligo SAB.

Transaction Details

• Issuer: Southern Copper Corporation (CIK: 0001001838)
• Reporting Person: Luis Miguel Palomino Bonilla (Director)
• Security: Common Stock
• Proposed Sale Amount: 400 shares
• Estimated Aggregate Market Value: $87,000 (~$217.50/share)
• Approximate Sale Date: September 1, 2026
• Acquisition Origin: Granted on April 30, 2024, under the Issuer's Directors Stock Award Plan as compensation for board services.

Prior 3-Month Activity

The filer disclosed several small incremental sales in the preceding three months totaling 504 shares:

• 06/02/2026: 100 shares for $20,000
• 06/05/2026: 4 shares for $724
• 07/24/2026: 100 shares for $17,900
• 08/04/2026: 100 shares for $19,500
• 08/05/2026: 100 shares for $19,830
• 08/05/2026: 100 shares for $20,000

Market Impact & Significance

• Trading Significance: Low. The proposed sale represents an immaterial fraction of Southern Copper's 834,328,506 shares outstanding.
• Pattern: The proposed liquidation aligns with routine small-scale sales of director equity awards rather than a fundamental shift in insider sentiment.