The economies of many countries have come to a standstill due to the contraction in global productioncaused by COVID-19 epidemic which was declared a pandemic by World Health Organization (WHO)in March 2020. The basic metal industry, which is the locomotive of the Turkish manufacturing sector, isone of the sectors greatly affected by the pandemic. The financial performances of companies in the sectorseriously affect the decision-making processes of managers and capital market investors. In this study, thefinancial performances of 20 firms listed in the BIST Base Metal Index (XMANA) during the pandemicwere analyzed. The analysis results of the pandemic period (2020/06 – 2021/06) were compared with theprevious one-year period and significant changes were found. For performance measurement, 15 differentcriteria were determined which were compiled from the balance sheet and income statements, consistingof liquidity, profitability, cost, value, growth, capital structure and activity ratios. In the study, Entropy,which is a multi-criteria decision-making method, was used to calculate the importance weights of thecriteria; in addition, the MARCOS Method, a new method proposed in 2020, was used to rank companiesaccording to the determined criteria. According to the analysis results, the metal industry company withthe highest financial performance during the pandemic period is ÇEMTAŞ Çelik Makina Sanayi ve TicaretA.Ş. (ÇEMTS). Kardemir Karabük Demir Çelik Sanayi A.Ş. (KRDMD) and AYES Çelik Hasır ve Çit SanayiA.Ş. (AYES) followed it, respectively.