Drawing from the varieties of capitalism theoretical framework, the study explores the home country influences of multinational corporations on their corporate social responsibility practices when they operate outside their national/regional institutional contexts. The study focusses on a particular CSR practice of seven MNCs from three varieties of capitalism – coordinated, mixed and liberal market economies – operating in the oil and gas sector of the Nigerian economy. The study concludes that the corporate codes of conduct of these MNCs operating in Nigeria, to a large extent, reflect the characteristics of their home countries' model of capitalism, respectively, albeit with certain degree of modifications. The home countries' model of capitalism is also found to have implications for the degree of adaptability of these MNCs' CSR practices to the Nigerian institutional context – with the mixed market economy model of capitalism adapting more flexibly than the liberal and coordinated market economies, respectively. The findings of this study will contribute to the emerging literature on the institutional embeddedness of CSR practices in transnational social spaces, understanding of varieties of capitalism, and CSR in developing economies.