Purpose of the Study: This paper aims to investigate the mediating role of marketing performance on innovation-financial performance relationship as well as on process capital-financial performance relationship using the publicly listed manufacturing firms on the Indonesia Stock Exchange (IDX). Methodology: This is a quantitative research employing marketing performance as the mediation variable. A mediation research model is constructed to test the hypotheses of this research using the Partial Least Squares Structural Equation Modeling. A new data set is prepared which involves the publicly listed manufacturing companies on the IDX covering a period of thirteen years from 2005 to 2017. Main Findings: The results of this research provide the following empirical evidence. Firstly, marketing performance partially mediates the relationship between innovation and financial performance. Secondly, marketing performance fully mediates the relationship between process capital and financial performance. Conclusion: This study provides a better understanding of managers regarding the mechanism of how innovation affects financial performance via marketing performance as well as on the mechanism of how to process capital affects financial performance via marketing performance. Application/Implication: This study implies that managers need to continuously innovate, improve manufacturing processes, and enhance marketing management to achieve better financial performance.