Atico Reports Multiple Higher-Grade Intercepts up to 10.20m of 6.26% Cu, 8.50 g/t Au and 10.0m of 6.77% Cu, 3.39 g/t Au and Continues to Extend the Ore Body at El Roble Mine in Colombia VANCOUVER, British Columbia, Jan. 28, 2026 (GLOBE NEWSWIRE) -- Atico Mining Corporation (TSX.V: ATY | OTCID: ATCMF) (“Atico” or the “Company”) is pleased to announce positive results from 21 drill holes completed in 2025 within an area of historical mining, successfully expanding the tonnage at the El Roble mine. The table below highlights some assay results in bold for drill core holes, which include 10.20m of 6.26% Cu, 8.50 g/t Au and 10.00m of 6.77% Cu, 3.39 g/t Au. Ore grade intercepts are reported over widths of 0.27 to 10.3 meters in areas with limited drilling with results highlighting the possibility of further extending the ore body with additional drill programs. Holes ATD-0329 through ATD-0348 have discovered important new mineralization which are considerably beyond our expectations for the ¨Cuerpo Principal Inferior¨ CP ore body. “Our ongoing drilling campaign at El Roble continues to deliver important results, intercepting new mineralization while successfully extending the boundaries of historical massive sulfide zones,” said Fernando E. Ganoza, CEO. “These assay results reinforce our confidence that higher-grade copper and gold mineralization extends beyond the historical footprint. The deposit remains open both at depth and along strike, confirming significant potential within and outside the previously defined mineralized shell. The drill campaign is planned to continue throughout 2026.” Exploration Drilling Results with a 1% copper cutoff Include: HoleFrom (m)To (m)Interval (m)Cu %Au g/tATD-032975.0082.307.309.932.56ATD-032992.9094.601.706.541.79ATD-032996.3099.102.806.561.40ATD-0329101.00102.001.002.914.95ATD-0329103.00113.0010.006.773.39ATD-0329119.60121.201.602.202.95ATD-033192.0094.802.807.266.28ATD-033195.4099.003.603.5124.61ATD-0331107.80109.001.207.457.95ATD-0331111.80113.701.907.304.61ATD-033398.3099.200.904.927.62ATD-0333100.00101.001.001.764.00ATD-0333104.00109.205.203.403.54ATD-0333112.00116.604.603.605.32ATD-0333119.50123.103.6010.149.46ATD-0333126.00127.001.003.351.11ATD-033491.6095.203.606.274.99ATD-033495.7098.002.302.633.14ATD-033499.50101.602.1010.652.16ATD-0334106.80108.802.007.701.10ATD-033670.1470.430.291.471.92ATD-033671.0071.270.274.3421.10ATD-033672.4076.003.603.913.85ATD-033868.4476.458.017.022.78ATD-033888.9093.204.301.58.60ATD-0338101.10103.001.906.362.09ATD-034093.7096.002.304.213.98ATD-034098.40108.7010.303.334.21ATD-034186.4090.904.505.57.83ATD-034192.3093.401.102.971.04ATD-034288.2591.603.354.9214.23ATD-034382.0084.502.501.211.22ATD-034385.0089.004.003.753.72ATD-0344105.10106.801.702.031.84ATD-0346112.00122.2010.206.268.50ATD-0347113.55119.205.655.948.72ATD-0347121.80122.801.001.4524.60ATD-0347123.90124.600.701.9431.70ATD-034881.1582.601.451.015.00ATD-034884.6086.351.753.2718.40ATDM-07043.0047.604.605.123.12ATDM-07135.0037.002.003.775.12ATDM-07139.0043.004.004.602.30ATDM-07337.0040.003.007.845.39ATDM-07537.2045.508.304.013.77ATDM-07843.6046.302.702.4412.67ATDM-08132.4033.501.104.954.90ATDM-08151.5054.402.901.981.15 True widths are dependent on uncertainties in the local strike and dip of the mineralization and are estimated to be between 90% and 95% of the drill intercept. Image 1: Mineralized shells based on historical massive and new bodies at the El Roble Mine with intercepts from the current drill program Image 2: Detailed view of mineralized shells based on historical massive and new bodies at the El Roble Mine with intercepts from the current drill program 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, to expand the historically identified resource and explore for new massive sulfide 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 over 5,000 meters of drilling during 2025. All intervals include only assays of greater than 1% Cu and higher-grade intervals within these sections do not occur. QA/QC Atico Mining adheres to strict Quality Assurance and Quality Control protocols. Blanks and certified reference standards are inserted in each sample batch of drill core that is sent to the lab for analyses. The ATD series of drill holes are HQ diameter and the ATDM series of drill holes are NQ diameter core. All drill core samples are split in half using a diamond saw with one half saved for reference and the other half shipped via secure transport to ALS sample preparation facility in Medellin, Colombia. Analysis is carried out at ALS, Lima, Peru. Core samples are analyzed for copper, silver, zinc and lead utilizing 4-acid dissolution followed by