This article analyzes the Wallenberg family’s central role within Sweden’s neutrality-industrial complex (NIC) during the Cold War, highlighting their secret collaboration with the military intelligence service. Drawing on archival evidence from the Swedish War Archives and the family bank SEB, the study shows how the family’s uniquely dominant position in industry, banking, and national defense made them a close partner to the intelligence community. By applying the Resource Mobilization Model from the literature on military-industrial complexes, the article further argues that Sweden’s NIC mainly developed as a corporatist response to perceived Soviet threats, requiring close coordination between state, military, and business elites. The Wallenbergs’ cooperation with the military and economic intelligence services—specifically through their control of SEB and large Swedish exporting firms—had both business and nonbusiness-related reasons, including nationalism and elite consensus on total defense. This study adds to the sparse literature in business history on the relationship between the business and intelligence communities and demonstrates how elite business families can use access to senior decision makers and classified information in the service of both national security and to advance their own strategic positioning.