This study aims to analyze the relationships between corporate governance instruments on the wealth of financial intermediaries in wide-ranging. The data employed in this study are secondary data from nine (9) commercial banks and covered the years 2013-2020. The approach used in data processing is a 2SLS estimation and multilevel mixed-effects for the dependent variable natural logarithm of total assets. The results provided by the econometric analysis show that board size, sovereign committees, Net Interest Margin (NIM), Non-Performing Loans (NPL"s), and equity to liabilities have an important impact on the protection of the assets of financial institutions. While surprising results have been generated in the composition of the board structure in terms of gender diversity, they have turned out to be insignificant. The originality and value of this study lie in the approach of including the characteristics of the board, as well as the combination of some financial indicators different from previous studies, which makes more comprehensive the study of the impact of board composition on increasing the wealth of banks.