Purpose - This thesis aims to explore the combined effects of entrepreneurs' human and social capital on the growth of small and medium-sized enterprises through internationalization. 

Research question - How does the interplay of an entrepreneur´s human and social capital influence small and medium-sized enterprise´s growth through internationalization?

Method - This research is a qualitative single case adopting an inductive approach aligned with an ontology relativism position and social constructivism position of epistemology. Seven semi-structured interviews were conducted to collect data for the research. The data was analyzed using the Gioia method, creating 33 first-order terms, 8 second-order themes, and, lastly, the aggregate dimension. 

Findings - The results of this research show that both the entrepreneur's human and social capital play a decisive role in the growth of SMEs through internationalization. There is a strong correlation between human and social capital, which means that SMEs cannot effectively go through the internationalization process solely with the support of one of these capitals without the other. By effectively utilizing both human and social capital, companies can create advantages and increase their competitiveness.

Implications - This research's Theoretical implications highlight that by examining the interplay between entrepreneurs' human and social capital, researchers can identify key factors for successful SME internationalization and understand network leveraging for growth. Additionally, this research provides practical implications by emphasizing the importance of leveraging human and social capital, existing networks, and strategic relationships to enhance SME internationalization and drive sustainable growth.