This study examines the role of Environmental, Social, and Governance (ESG) reporting in Argentina's lithium mining industry, which has seen increased demand due to the global focus on climate change. A central aim of the research was to analyze the standards, commitments, and mechanisms that major lithium mining companies in Argentina have used to govern extraction and processing on selected lithium-bearing frontiers. The methodology included archival research that documented national and provincial laws, company documents, and relevant news reports, as well as 27 interviews with key informants from government, industry, civil society, and academia. The study identified 10 indicators of reporting strength and found that larger companies with closer ties to end producers were more likely to have clearly defined ESG metrics and reports. The research provides valuable insights into the ways in which multinational mining firms measure and report ESG standards on one of the world’s fastest-growing lithium frontiers.