Mr. Fernando Ganoza reports

ATICO REPORTS MULTIPLE HIGH-GRADE INTERCEPTS UP TO 8.70M OF 11.44% CU, 14.65 G/T AU AND 6.16M OF 13.32% CU, 2.79 G/T AU AND CONTINUES TO EXTEND THE ORE BODY AT EL ROBLE MINE IN COLOMBIA

Atico Mining Corp. has released positive results for 19 drill holes completed during 2025 in an area of historical mining to expand tonnage at the El Roble mine. In addition, the company reports the highlights from assay results for two drill core holes (see the table below), which included 8.70 metres of 11.44 per cent copper and 14.65 grams per tonne gold and 6.16 metres of 13.32 per cent copper and 2.79 grams per tonne gold. Ore-grade intercepts in another 16 drill holes are also reported over widths of 1.2 to 16.7 metres in areas with limited drilling and the results highlight the possibility of further extending the orebody with additional drill programs. In addition, a new sulphide body was discovered adjacent to the main orebody during the drill program.

"The ongoing drilling campaign in the mine vicinity continues to highlight the strong potential of the El Roble deposit, discovering new mineralization, along with successfully extending the main historical massive sulphide bodies," said Fernando E. Ganoza, chief executive officer. "These assay results continue to increase confidence in our view that additional high-grade copper and gold mineralization remains both within the historically defined bodies and beyond the previously outlined mineralized shell and are open at depth and along strike. The drill campaign is planned to continue throughout 2025."

Exploration drilling program

The goal of the 2025 underground drilling program at the El Roble mine is to define zones of mineralization within the extent of the main historic massive sulphide body that were not exploited by previous operators, expand the historically identified resource and explore for new massive sulphide bodies. The company began this drill infill program to test the main mineralized body and the immediately adjacent area during the first quarter of 2023 and has continued the program with 885.6 metres of drilling during 2025.

El Roble mine

The El Roble mine is a high-grade, underground copper and gold mine with nominal processing plant capacity of 1,000 tonnes per day, located in the department of Choco in Colombia. Its commercial product is a copper-gold concentrate.

Since obtaining control of the mine on Nov. 22, 2013, Atico has upgraded the operation from a historical nominal capacity of 400 tonnes per day.

El Roble has proven and probable reserves of 1.00 million tonnes grading 3.02 per cent copper and 1.76 grams per tonne gold, at a cut-off grade of 1.3 per cent copper equivalent, with an effective date of Sept. 30, 2020. Mineralization is open at depth and along strike and the company plans to further test the limits of the deposit.

On the larger land package, the company has identified a prospective stratigraphic contact between volcanic rocks and black and grey pelagic sediments and cherts that has been traced by Atico geologists for 10 kilometres. This contact has been determined to be an important control on VMS (volcanogenic massive sulphide) mineralization, on which Atico has identified numerous target areas prospective for VMS-type mineralization occurrence, which is the focus of the current surface drill program at El Roble.

Qualified person

Garth Graves, PGeo, consultant geologist for Atico Mining and a qualified person in accordance with National Instrument 43-101, has reviewed and approved the technical information contained in this news release.

About Atico Mining Corp.

Atico is a growth-oriented company, focused on exploring, developing and mining copper and gold projects in Latin America. The company generates significant cash flow through the operation of the El Roble mine and is developing its high-grade La Plata VMS project in Ecuador. The company is also pursuing additional acquisition of advanced-stage opportunities.

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