Stakeholder management (SM) is of utmost importance in ensuring timely project delivery, delivery within budget, to the right quality level and to client’s satisfaction. Private corporate organizations have limited resources and so could not afford project cost or time overrun and other issues that could impact project success. While studies are available that examined factors impacting stakeholder management in public building projects, there is a paucity of research on factors influencing stakeholder management in building projects procured by private corporate organizations; hence this study. The objective of the reported study is to assess the factors influencing SM in building projects procured by private corporate organizations in Southwestern Nigeria with a view to enhancing project delivery. The data for the study were collected using a structured questionnaire survey. Purposive sampling technique was used to select project managers (PMs) and client representatives (CRs) that were involved in the management of building projects procured by private corporate organizations between 2008 and 2017. A total of 106 questionnaires were received from PMs and CRs that responded to the questionnaire survey. The data collected were analysed using mean score (MS) analysis, Student’s t-test and factor analysis. The result shows that the most important factors influencing SM comprise of ‘maintaining good relationships with stakeholders’, ‘addressing stakeholders’ concerns and needs’ and ‘avenue for communicating project impacts’. The further result using factor analysis shows that the factors influencing SM could be categorized into six component groupings of - project relationship, information input, stakeholder estimation, decision-making, sustainable support and external project relationship awareness. The study concluded that project managers need to pay attention to the identified topranking factors in order to achieve improved project delivery.