Atico Mining Corporation report of an updated NI 43-101 mineral resource and reserve estimate as on March 12th 2024 for the El Roble Mine located in Colombia. The updated mineral resource and reserve estimate for El Roble was prepared by staff and consultants of Miner SA, an Atico Mining operating subsidiary. Mr. Thomas Kelly (SME Registered Member 1696580) has reviewed the reserve estimate and Mr. Antonio Cruz (AIG Registered Member 7065) has reviewed the resource estimate and both have acted as the qualified persons as defined by Canadian National Instrument 43-101.

The Mineral Reserves reported herein were estimated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM) Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions and adopted by CIM Council. This reserve estimate is based on all data available through March 12, 2024. Resource and Reserve Estimation Methodology: The Mineral Resource estimation considers channel and core samples, in addition to the underground mine mapping for the construction of three-dimensional wireframes of the lithology and mineralized bodies.

Estimation of grades in the block models only considers samples located inside the mineralized bodies solid, which are applied to anomalous grade or top cut treatment and a further compositing process. The model was constructed using 2m x 2m x 2m blocks, which represents the selective mining unit (SMU). The orebodies estimation is conducted separately body by body and element by element (Cu and Au).

The methods used for grade estimation are cubic inverse distance (Goliath, Maximus, Maximus Sur, Perseo, A, B, D, D2, Afrodita, Rosario and Cuerpo Principal Orebodies) and Ordinary Kriging (Zeus Orebody). A specific density factor was assumed for each site to convert block volumes to tons for the bodies: Goliath = 3.34 t/m3, Maximus = 3.50 t/m3, Maximus Sur = 3.26 t/m3, Zeus = 3.53 t/m3 and Perseus = 3.35 t/m3. For mineralized bodies A, B, D, D2, Afrodita and Rosario the densities were estimated with IDW.

Mineral resources are reported with a limit of 0.87% CuEq cut-off for ore-body Zeus, 0.61% CuEq cut-off for ore-body Goliath, Maximus, Maximus Sur and Perseo and 0.86%CuEq cut-off for ore-body body A, B, D, D2, Afrodita, Rosario and Cuerpo Principal. For each block, the CuEq value was calculated by multiplying one ton of mass of each block grade by its average recovery, payable metal recovery, and metal price. Blocks with a CuEq grade higher than the CuEq limit were included in the resource estimate.