For manufacturers to remain competitive, there is a recognised need to be highly innovative in the creation of new products and enhancements to existing ranges. Since its conception in 2003, Open Innovation (OI) has developed into a prominent research theme within innovation-related literature and is seen to impact positively on company performance. Many large manufacturers are now adapting their innovation processes to adopt OI and seek valuable expertise from external sources, including customers, suppliers and even competitors. This study explores the OI practices of three multinational manufacturers operating in three distinct sectors: aerospace, electronics and beverages. Findings suggest that by adopting the OI model, companies can remain competitive through co-creation and greater engagement with stakeholders. However, companies must explore and identify best practices for inbound and outbound co-creation.