Aim/Purpose: This dissertation examines the impact of social capital on high-value-added immigrant entrepreneurship, focusing on how networking, interpersonal trust, and institutional trust shape entrepreneurial activities in advanced sectors. Research Design/Methodology: The study utilises a longitudinal ethnographic approach and semi-structured interviews to gather insights from high-value-added immigrant entrepreneurs, followed by thematic analysis and inductive multiple�case study to identify key patterns. Findings: The research highlights the critical role of social capital, particularly the importance of weak ties and horizontal networking in operational support, interpersonal trust in establishment, and institutional trust in strategic decisions across borders. Contributions: This study advances the understanding of how social capital influences high-value-added immigrant entrepreneurship, offering insights into the mechanisms behind networking and trust in immigrant entrepreneurial contexts. Keywords: Social Capital, Immigrant Entrepreneurship, High�Value-Added, Networking, Trust, Ethnography