LUCA PROVIDES OPERATIONS AND CORPORATE UPDATE

Executive Summary

• Luca Mining Corp. provided a material operational update highlighting improved efficiencies, increased throughput, and successful stockpile creation at its Campo Morado and Tahuehueto mines following the appointment of new operational leadership.
• At Campo Morado, a surface stockpile of mineralized material grew to ~63,000 tonnes by May 31, 2026, enabling optimized mill feed blending and anticipated metallurgical recovery improvements.
• At Tahuehueto, enhanced mining contractor performance and increased mill availability drove milling rates to average over 1,050 tpd in April and May, representing a >5% increase over Q1 2026.
• The company also announced the departure of its Chief Technical Officer and Vice President of Metallurgy and Process Engineering.

Key Details

• Campo Morado Operations:
• Surface stockpile of mineralized material reached ~63,000 tonnes as of May 31, 2026, a five-fold increase from <12,000 tonnes at December 31, 2025.
• Mill throughput remained strong and consistent in April-May, averaging ~1,900 tonnes per day (tpd).
• The established stockpile will allow optimization of the mill feed blend, expected to improve overall metallurgical recovery performance and support additional planned optimization programs.
• Tahuehueto Operations:
• Improved mining rates driven by contractor La Cantera's performance and increased mill availability.
• Milling rates averaged over 1,050 tpd in April and May, a greater than 5% increase over the first quarter of 2026.
• Corporate & Management Changes:
• Departure of Ramón Mendoza (Chief Technical Officer) and Dr. Jose Hernandez (Vice President, Metallurgy and Process Engineering).
• New operational leadership under COO Nick Shakesby (joined April 2026) has rapidly implemented initiatives to derisk and optimize mining and milling operations across both projects.
• Asset Overview:
• Campo Morado: Underground VMS-style polymetallic mine (Zn, Cu, Au, Ag, Pb) located in Guerrero State, Mexico, on a 121 sq km land package.
• Tahuehueto: Newly constructed underground epithermal Au/Ag vein mine located in Durango State, Mexico, on a >100 sq km property, now in commercial production.

Notable Quotes

• Dan Barnholden, CEO and Director: "Under new operational leadership, led by COO Nick Shakesby who joined Luca in April of this year, we have rapidly implemented a series of initiatives across both projects to further derisk and optimize our mining and milling operations. We look forward to continuing this positive momentum and the realization our asset's full potential."