Green knowledge sharing plays a pivotal role in enhancing businesses’ environmental performance by promoting sustainable practices, innovation, and operational efficiency. Using a knowledge-based view [KBV], the current investigation aims to explore a moderated mediation model to investigate the relationship between green knowledge sharing and green performance. Green creativity is proposed as an explanatory variable that explains the relationship between green knowledge sharing and green performance, while green human capital is proposed as a boundary condition for green knowledge sharing and green creativity relationships. Data from 266 respondents working at managerial levels in different firms with offices in Riyadh were collected using the snowball sampling technique and were used to analyze the proposed moderated mediation model. The findings indicate that green creativity significantly mediates the relationship between green knowledge sharing and green performance, and green human capital moderates the relationship between green knowledge sharing and green creativity. This study highlights the importance of knowledge sharing and creativity in enhancing green performance. It also suggests that organizations investing in green human capital can strengthen these relationships. The results also offer practical insights for policymakers and managers on how green knowledge sharing can foster sustainable environmental performance.