This study aims to respond to the new auditing standard on the information reporting of Key Audit Matters (KAMs) as a separate section in the auditor’s report, which will increase the transparency and quality of the report. It not only explores the current practice of KAM reporting among Thai listed companies but also seeks factors that influence KAM reporting in Thailand. This study explores the quantitative methodology through secondary data collected from the Thai Stock Exchange. This archival research explores 343 listed companies in the Thai Stock Exchange from 2016 to 2020. Descriptive statistics, a correlation matrix, and regression analysis are employed. The results suggest that the type of auditor (Big 4 or non-Big-4 audit firms), audit fee, audit independence, and industry have a direct positive impact on Key Audit Matter reporting at a 0.05 significance level. However, the evidence also suggests that the presence of females on the board, year, ROA (return on asset), risk, and size were not validated factors that have direct positive impacts on Key Audit Matter reporting at a 0.05 significance level.