Copper mining activities have a huge importance for both the Peruvian economy and the world. Then, it is important to analyze how mining companies face productivity to stay afloat in the competitive world market. For this reason, Peruvian mining companies were analyzed in the 2016-2019 period by employing the Malmquist index as well as its decomposition. Two-year, three-year, and four-year intervals were used for a better understanding of the results. It was found that the major determinants for productivity change was technical efficiency change and technological switch.