The growing emphasis on environmental, social, and governance (ESG) practices has made sustainability reporting an important mechanism for enhancing corporate transparency, accountability, and long-term value creation. This study examined the effect of sustainability reporting on firm value of quoted consumer goods firms in Nigeria. The population comprised of all the twenty-one (21) consumer goods firms quoted on Nigeria Exchange Group while purposive sampling technique was used to arrive at sixteen (16) sampled consumer goods firms covering the periods of eleven (11) years ranging from 2015 to 2025. The hypotheses were tested using the robust effect regression model after conducting some diagnostics tests. The findings revealed that both environmental reporting and social reporting has a significant negative effect on market share price of quoted consumer goods firms in Nigeria. The findings also indicated that governance reporting has an insignificant positive effect on market share price of quoted consumer goods firms in Nigeria. The study recommended among others that consumer goods firms in Nigeria should strengthen environmental reporting by providing detailed, accurate and measurable information on waste management, energy consumption, pollution control, emissions reduction, recycling, environmental protection and the efficient use of natural resources. The study further recommended that Firms should demonstrate how effective governance mechanisms contribute to accountability, transparency and long-term value creation. Strong governance reporting can reduce information asymmetry and increase investors' confidence in the reliability of corporate decisions.