<div> B2B purchase decisions have undergone a structural transformation.&nbsp; </div> <div> <br> </div> <div> Where convincing a single procurement manager once sufficed, today every buying decision involves an average of six to ten stakeholders, each with distinct objectives, concerns, and success metrics (Gartner, 2019-2024). This complexity has rendered standardised sales strategies obsolete and opened a decisive competitive space for those who know how to orchestrate personalised conversations with complex decision-making ecosystems.&nbsp; </div> <div> <br> </div> <div> This paper argues that Account-Based Marketing (ABM)-when integrated with a strategic intelligence logic and targeted thought leadership-represents the most effective response to this complexity. ABM is not a lead generation tactic but a paradigm shift: from mass marketing to the surgical conquest of high-value accounts, one account and one stakeholder at a time.&nbsp; </div> <div> <br> </div> <div> We propose the Applied Strategic Intelligence (ASI) framework, which describes how the collection, interpretation, and activation of contextual data on target accounts — combined with thought leadership content calibrated to their strategic imperatives — generates sustainable competitive advantage in high-complexity B2B environments. The paper includes a case study from the cybersecurity/banking sector and specific implications for Italian industrial SMEs. </div>