A modest sandstone building in central Stockholm houses one of Sweden's most important enterprises: Investor AB, the Wallenberg family's holding company with stakes in world-leading businesses. The company can trace its roots to André Oscar Wallenberg, who established Stockholms Enskilda Bank in 1856 with the goal of supporting Sweden’s industrialisation. The mission influenced how the bank operated during periods of crisis, preferring to work with distressed clients on restructuring plans and holding on to its investments for decades. This approach earned the bank its reputation as the trusted partner for Swedish industrial businesses. 170 years after the founding of Stockholms Enskilda Bank, the Wallenberg family remains influential. Investor AB, established in 1916 to manage the family’s holdings in industrial businesses, is worth more than $100 billion today. Long-termism has been important to success, which has been institutionalised through the creation of the Wallenberg Foundations. The foundations not only act as anchor shareholders in Investor AB, but they also distribute dividends to fund research and innovation that benefit Swedish industries. The achievement of the Wallenberg family demonstrates that shareholder interests are not inherently detrimental to business success or wider societal impact, but the time horizon matters.