Ownership Structure and Financial Performance of Listed Manufacturing Firms in Nigeria

This study examines the relationship between ownership structure and the financial performance of listed manufacturing firms in Nigeria over the period 2012–2025. Using an unbalanced panel dataset of 148 firms listed on the Nigerian Exchange Group (NGX), we estimate fixed-effects and random-effects panel regression models, supplemented by the Hausman specification test, to assess the effects of managerial ownership, institutional ownership, foreign ownership, government ownership, and ownership concentration on Return on Assets (ROA). Control variables include firm size, leverage, Big 4 auditor dummy, board independence, industry dummies, and year dummies. Drawing on agency theory, stewardship theory, and resource dependence theory, the study finds that institutional ownership and foreign ownership exert significant positive effects on financial performance, while government ownership concentration is associated with diminished performance outcomes. Managerial ownership exhibits a non-linear, inverted U-shaped relationship with ROA, consistent with alignment-entrenchment dynamics. Board independence and Big 4 auditor engagement are found to positively moderate firm performance. The findings contribute novel panel evidence on the ownership–performance nexus in an African frontier market context and carry important implications for regulators, policymakers, and corporate governance reform advocates in Nigeria.