The Philanthropic Capital Study was mandated by the European Investment Advisory Hub (EIAH) in the context of the European Social Economy Action Plan, which recognised philanthropic organisations as key actors of the social economy in Europe. Philanthropic organisations are essential actors, uniquely positioned to deploy valuable funding to address societal challenges. Though grant making continues to be the main instrument of mission delivery, mission related investments (‘MRIs’) are a growing if nascent feature. Beyond delivering a financial return, these investments do in addition seek to have a positive societal impact in line with philanthropic missions and values. This dedicated study sets out to review the stocks and flows, as well as the nature and the structure of a sample of European philanthropic organisations. It does so through a series of high-level interviews held with philanthropic actors to establish how they deploy their capital towards investments contributing to the pursuit of their philanthropic objectives. It further seeks to establish how these actors strive to build on their early achievements in developing the MRI concept, and how financial instruments, as public policy tools, can enhance the impact of the funds they currently deploy or enable additional actors to join the fray. In recognition of the potential of such investments for the advancement of common missions shared by the EU and philanthropic organisations, this analysis introduces the opportunity to bring to bear the InvestEU Programme in support of those actors that want to use investments as additional means of achieving their mission. It should be underlined that while philanthropic actors do of course support their missions through donations as well as through investments, largely but not exclusively made from their endowment, the present study shall focus solely on the latter, which have to date been used to a lesser extent for this purpose.