Trust is often the premier concern highlighted in relation to the formation of mercantile business partnerships, the role of culture, family, and religion at the forefront. This is especially the case for expatriate communities. However, the Danish merchants of nineteenth century Newcastle-upon-Tyne, as especially demonstrated in the diaries of one of their number, Richard Steenberg, did not conform to this trend. This article investigates Steenberg and two other leading merchants, the Borries cousins, as well as some of their former employees, who typify trends within a wider body of 126 businessmen. It will show that they strategically chose partners who had complimentary supplies of financial, human, and social capital to improve the position of a shared firm, and these supplies formed the key criteria in forming or entering these businesses. The role of trust is not denied. Rather, this article seeks to direct debate toward the importance of financial, human, and social capital in commercial partnership formation in relation to trust.