Innovation plays a prominent role in the contemporary world. It brings novel products and services to the market while exploring new ways of production, distribution, marketing and impacts all other aspects of organizations including human behaviour through hard as well as soft methods. Open innovation has been introduced as a new paradigm in innovation management. This study examines the impact of open innovation on innovation performance of the listed companies in Sri Lanka with the moderating effect of inter-organizational networks. Open innovation practices have been recognized in this study in two folds - as outside-in open innovation and inside-out open innovation Data were collected through a survey among 165 top-level managers of listed companies in Sri Lanka. The sample was selected using purposive and snowballing sampling methods. After testing the validity and the reliability of the instrument and collected data, simple regression analysis was conducted to test the hypotheses. The study findings indicate that both outside-in open innovation and inside-out open innovation positively and significantly impact innovation performance.
