Mr. Fernando Ganoza reports

ATICO CONTINUES TO EXTEND THE ORE BODY AT EL ROBLE MINE IN COLOMBIA WITH ADDITIONAL INTERCEPTS UP TO 12.0M OF 8.50% CU, 7.23G/T AU, PROVIDES UPDATE ON REGIONAL EXPLORATION AND REVISES RESULTS FROM PREVIOUS NEWS RELEASE

Atico Mining Corp. has released additional positive results for the exploration program being carried out in an area of historical mining to expand tonnage at the El Roble mine. In addition, the company has released the results for seven diamond drill core holes, which included 12 metres of 8.50 per cent copper, 7.23 grams per tonne gold and 7.80 m of 4.71 per cent Cu and 7.24 g/t Au.

"We are pleased to report that our mine vicinity drill campaign continues to intercept mineralization and extends the main historic massive sulphide body at the El Roble deposit. This area was mined by operators previous to Atico obtaining control of the mine on Nov. 22, 2013," said Fernando E. Ganoza, chief executive officer. "These 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. These strong assay results are open at depth and along strike and we will continue the drill program in this vicinity and into the second half of the year at which time the company plans to update the resource estimate."

Exploration drilling program

The goal of the current surface and underground drilling program at the El Roble mine is to define zones of mineralization within the extent of main historic massive sulphide body that were not exploited by previous operators and also to expand the historically identified resource. During the first quarter of 2023, the company began a drill program to test the main mineralized body and the immediately adjacent area. A total of 3,765 metres of drilling are planned for 2023, of which final results for 10 drill holes that have a mineralized intercept have been received.

Revision to previously reported results

The attached table is a revision to the previously reported results table in the news release dated May 23, 2023.

Anomaly 8

Anomaly 8 has been drill tested with seven diamond drill holes completed to date for a total of 3,792 metres. The target was selected based on a strategic review of historical and recent exploration programs and lies within the favourable stratigraphy that hosts the currently producing high-grade Cu/Au volcanogenic massive sulphide El Roble mine. Anomaly 8 is defined by values from surface outcrop of up to 11 per cent Cu within a hydrothermal breccia coincident with a 900 m by 300 m area of soil and rock copper anomalies, electromagnetic, and magnetic geophysical anomalies. Strong alteration with massive sulphide fragments and stringers were intersected in drill holes cutting the target horizon at vertical depths of more than 300 metres below the mineralization that occurs at surface. Elevated copper, zinc and silver values were returned from core samples as follows:

• ATDHAN8-007: 25 m at 0.4 per cent Cu, including 7.3 m at 0.64 per cent Cu;
• ATDHAN8-004: 20 m at 856 parts per million zinc, five ppm silver.

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 one million tonnes grading 3.02 per cent copper and 1.76 g/t 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 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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