Governments and companies exchange various kinds of data. The methods to exchange data are evolving and becoming more and more advanced, supported by the rapid development of information and communication technology (ICT). Although some research has been carried out on the adoption of ICT-based information sharing, there is still very little understanding of enablers for information sharing arrangements between private and public organisations. Developing an information sharing arrangement often requires complex interactions among parties resulting in negotiated arrangements. This paper aims to derive factors of information sharing arrangements by assessing the importance of factors in shaping information sharing from public and private organisations perspectives. Factors found in previous studies were analysed using the Best-Worst method by collecting experts’ opinions. While private sector’s expert was much focussed on the Perceived Benefits, the public sector’s experts considered Trust, Investment, Perceived Costs and Relationship as the most important factors in shaping the information sharing arrangement between public and private organisations. Identifying which factors are crucial in shaping information sharing arrangements can help in reducing potential conflicts during planning, implementation and usage, and bringing benefits to all stakeholders.