Mr. Dan Barnholden reports

LUCA PROVIDES OPERATIONS AND CORPORATE UPDATE

Luca Mining Corp. has provided an update on continuing initiatives to improve operational efficiencies at its Campo Morado and Tahuehueto mines.

With the addition of new operational leadership, Luca is advancing these initiatives which are designed to improve mill performance and throughput as well as optimize mining activities at both mines.

At Campo Morado, strong performance of mining contractor Cominvi, combined with improved mine planning, has resulted in creation of a surface stockpile of mineralized material of approximately 63,000 tonnes as at May 31, 2026, a fivefold increase from the less than 12,000 tonnes at Dec. 31, 2025. Mill throughput has remained strong and consistent in April and May, with an average of approximately 1,900 tonnes per day. This establishment of a meaningful surface ore stockpile at Campo Morado will allow Luca to optimize the mill feed blend at the operation, which is expected to lead to overall improvement in metallurgical recovery performance and, importantly, augment the design and execution of additional planned optimization programs in the coming months.

At Tahuehueto, a combination of improved mining rates, driven by the performance of mining contractor La Cantera as well as increased mill availability, has resulted in increased and consistent mining and milling rates. Milling rates at Tahueheuto have increased to average over 1,050 tonnes per day in April and May, a greater-than-5-per-cent increase over the first quarter of 2026.

Dan Barnholden, Luca's chief executive officer and director, commented: "Under new operational leadership, led by COO [chief operating officer] 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."

Corporate update

The company also announces the departure of Ramon Mendoza, chief technical officer, and Dr. Jose Hernandez, vice-president, metallurgy and process engineering. Luca would like to thank both individuals for their contributions to the company and wish them success in their future endeavours.

About Luca Mining Corp.

Luca Mining is a Canadian mining company with two wholly owned mines located in the prolific Sierra Madre mineralized belt in Mexico. These mines produce gold, copper, zinc, silver and lead and generate strong cash flow. Both mines have considerable development and resource upside as well as significant exploration potential.

The company's Campo Morado mine hosts VMS-style (volcanogenic massive sulphide), polymetallic mineralization within a large land package comprising 121 square kilometres. It is an underground operation, producing zinc, copper, gold, silver and lead. The mine is located in Guerrero state.

The Tahuehueto mine is a large property of over 100 square kilometres in Durango state. The project hosts epithermal gold and silver vein-style mineralization. Tahuehueto is a newly constructed underground mining operation producing primarily gold and silver. Luca has successfully commissioned its mill and is now in commercial production at Tahuehueto.

Qualified person

The technical information contained in this news release has been reviewed and approved by Paul D. Gray, PGeo, vice-president, exploration, at Luca Mining. Mr. Gray is a qualified person for the company as defined by National Instrument 43-101.

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