Sustainability reporting has seen increased adoption as more businesses are recognizing wider societal and environmental obligations outside of traditional shareholder commitments. Several jurisdictions such as Malaysia and Hong Kong have passed regulations to encourage or mandate sustainability reporting. Likewise, Singapore has instituted mandatory sustainability reporting for all listed companies since 2016. The development of sustainability reporting in Singapore is explored using material from government agencies, company sustainability reports, conference speeches and newspaper articles. Viewing sustainability reporting as a socio-material assemblage of heterogeneous actors, discursive practices and other policy artefacts, local corporate sustainability initiatives are framed heavily in business logics such as the ‘triple bottom line’, while being anchored to broader national sustainability campaigns and commitments under international agreements. Such an economistic framing may limit the effectiveness of efforts to drive genuine changes in corporate sustainability, as companies may merely engage in a ‘checkbox ticking’ exercise to fulfil regulatory obligations. This paper highlights the multisited nature of policymaking and the tensions that may arise in a top-down approach to implementation. © The Author(s) 2021.