The paper examines how ethical business practices and transparency influence the financial information quality (FIQ) of consumer goods firms listed on the Nigerian Exchange Group. Using stakeholder and signaling theories as theoretical anchors, the study underscores the importance of corporate culture in ensuring reliable financial disclosure. Employing an ex-post facto research design, data were collected from audited financial statements of 20 listed consumer goods firms for the period 2018–2022. Business conduct and ethics were proxied through IFRS-based mandatory and voluntary disclosure indices, while transparency was assessed using the proportion of disclosures aligned with the Corporate Governance Code. Financial information quality was measured using absolute residuals values model. The empirical analysis was conducted using panel data regression models and diagnostic robustness tests in STATA. Findings indicate that both ethical conduct and transparency have statistically significant positive impacts on FIQ. The study concludes that beyond structural governance, normative governance elements such as corporate values and openness play crucial roles in enhancing financial statement credibility. These results have practical implications for corporate regulators, boards, and stakeholders in the Nigerian business landscape, emphasizing the need for enforcing integrity-driven governance codes. The paper advocates for institutional strengthening of disclosure requirements and ethical frameworks to improve financial reporting quality and corporate accountability.