Purpose The purpose of this paper is to unravel the success story of a family business, while engaging with debates in business and management research through the application of corporate strategy frameworks. Implement a structured methodology to evaluate a company’s strategic efforts and explore how businesses historically achieved competitive advantages over time. Design/methodology/approach This company analysis adopts a longitudinal approach on competitive advantages, moving beyond traditional cross-sectional business to transform static models into dynamic ones. It adheres to Michael Porter’s Value Chain model (1985) and his subsequent revisions (1996, 2001) to explore how competitive advantages emerge and are sustained. Data exploration leverages an extensive archival corporate collection comprising approximately 100,000 documents, enabling a thorough examination of value chain activities through primary and secondary sources. Findings Chocolates Amatller effectively channelled its competitive advantages through strategic operational areas, including purchasing cocoa at prices below market value, using strong marketing tools such as illustrative collectible cards and posters and implementing skilful financial strategies. Originality/value Examine why, when and how a Spanish chocolatier achieved a position of prominence among Spain’s foremost industrial figures by constructing Barcelona’s iconic Casa Amatller.