Climate change poses significant risks to economic stability and sustainable development, necessitating a reorientation of corporate governance frameworks toward environmental accountability and innovation. This paper examines the role of corporate law in advancing green-tech governance in Nigeria, arguing that the existing shareholder-centric model under Nigerian corporate law is inadequate for addressing climate-related risks and promoting climate-smart technologies. Using doctrinal legal analysis, the study interrogates Nigeria’s corporate law framework particularly the Companies and Allied Matters Act (CAMA) 2020, the Climate Change Act 2021, and related regulatory instruments to identify gaps in sustainability reporting, director accountability, ESG integration, and incentives for green innovation. The article situates Nigeria’s experience within global developments in Environmental, Social, and Governance (ESG) theory and stakeholder-oriented corporate governance. It contends that the absence of mandatory climate-risk disclosure, weak enforcement mechanisms, and limited statutory incentives undermine the effectiveness of corporate participation in climate mitigation and adaptation. The paper proposes a reimagined corporate law framework that embeds ESG duties into directors’ obligations, mandates climate-risk disclosure aligned with international standards, incentivizes green-tech investments, and strengthens regulatory enforcement. By advancing these reforms, the paper contributes to scholarly discourse on sustainable corporate governance and offers policy-relevant insights for aligning Nigeria’s corporate law with climate resilience and green economic transformation.