The study provides information on the production, technology structure and geographical distribution of leading European firms. A database with firm-level data has been established and complemented by estimates of indicators of industry structure, including the diversification and technological advancement of a firm's production, the intra-EU multinationality of firms, as well as the degree of concentration and geographical agglomeration of industries. An in-dept empirical analysis of the relationship between technological leadership and market leadership has been conducted. The results indicate an increasing importance of technology for production leadership. Firms with the strongest market positions combine a broader technology portfolio strategy, while ensuring a deeper technology position in the sector of dominance. Technology leadership has a strong impact on the production share that new entrants can attain. The study confirms a positive link between technology and market leadership growth.