This study examined the effect of capital structure and innovation on the corporate performance of manufacturing companies listed on the IDX. This study examined firm size moderation on the effect of capital structure and innovation on corporate performance. The research sample was manufacturing companies listed on the Indonesia Stock Exchange in the 2013 - 2017 period. The sampling method utilized was the purposive sampling technique. Data analysis used WarpPLS. | The role of capital structure and innovation in corporate performance utilizing firm size as moderation: Study of manufacturing companies listed on the IDX