Global climate change governance is under increasing pressure to deliver meaningful action. It is now widely agreed that a low-carbon growth path requires major transformations of energy systems. The ways in which the 10 largest oil and gas companies in the world present their rationales for addressing climate change and their activities related to climate action, including the oil and gas companies' involvement in international climate diplomacy, are examined. How these major companies in different world regions seek to influence states and other actors are illustrated through their actions on climate change. The analysis highlights the relations between state and non-state actors and our understanding of the allocation of responsibility in climate change politics. Novel empirical findings contribute to new insights into the climate change activities currently underway in the oil and gas sector, with implications for both the theory and practice of climate change governance.