Organizations need funds for their functioning. This is particularly important in the case of entities whose activities are oriented not only to achieving profit, but also pursuing other social goals. Financing an organization with endowment funds allows the organization to remain independent and survive while reducing the prices for the services provided. The first part of the study indicates the definitional aspects of "endowment capital" and the research method used in the study. The next part of the study presents an analysis of endowment management at Harvard University, the University of Oxford and the Nobel Foundation. The last part of the article presents the conclusions from the analyses.