This paper analyzes the role of a very multifaceted lobby group, the Spanish Maritime League, in the context of the relationships between the economic and the political spheres during the first decade of the twentieth century. It specially focuses in the League's ability to influence three important economic variables of the period (public subsidies to the merchant fleet, the protectionist policy towards coal production, and the policies in naval production) as well as in the strategies followed by its leaders to move forward their proposals.