Osaivbie Katherine AGHAMA-ENOFE

The research study examined the influence of corporate governance mechanisms on the firm performance in Nigeria. Five(5) research question were raised for the study and all were formulated into hypothesis and four(4) were tested. Consequently,related literature on the conceptual review, theoretical framework and empirical review of corporate governance mechanisms and firm performance in respect to board size, board independence, ownership structure, CEO Duality were also discussed adequately in chapter two(2). The ex-post facto research design was used for the study. The instrument used for the collection of data was annually published audited financial statements of banks. Secondary data were obtained from the annual reports gotten from the bank website covering the period 2016-2022. The data collected for the research questions were analyzed using descriptive statistics while the hypotheses were analyzed using Stationery (Unit root) test and Panel Data analysis and was tested at 0.05 level of significance. The findings of the study revealed that board size and board independence has a significantly positive relationship on firm performance in Nigeria. The study also found that ownership concentration significantly and negatively affects firm performance in Nigeria.Lastly, the study found a statistically insignificant and positive relationship between CEO duality and firm performance in Nigeria. The study recommended that they should Strengthen Board Independence: Nigerian deposit money banks should continue to prioritize board independence,they should appoint independent directors who are not influenced by the interests of major shareholders or management. This practice can help ensure that corporate governance structures remain robust and that decisions are made in the best interests of the company and its stakeholders.