Open Society Foundations (OSF), formerly the Open Society Institute, is a grantmaking network founded and chaired by business magnate George Soros. Open Society Foundations financially supports civil society groups around the world, with the stated aim of advancing justice, education, public health and independent media. The group's name was inspired by Karl Popper's 1945 book The Open Society and Its Enemies.
As of 2015, the OSF had branches in 37 countries, encompassing a group of country and regional foundations, such as the Open Society Initiative for West Africa, and the Open Society Initiative for Southern Africa; its headquarters are at 224 West 57th Street in New York City. In 2018, OSF announced it was closing its European office in Budapest and moving to Berlin, in response to legislation passed by the Hungarian government targeting the foundation's activities. As of 2021, OSF has reported expenditures in excess of $16 billion since its establishment in 1993, mostly in grants towards NGOs, aligned with the organisation's mission.
On May 28, 1984, business magnate George Soros signed a contract between the Soros Foundation (New York City) and the Hungarian Academy of Sciences, the founding document of the Soros Foundation Budapest. This was followed by several foundations in the region to help countries move away from Real socialism in the Eastern Bloc.
In 1991, the foundation merged with the Fondation pour une Entraide Intellectuelle Européenne ("Foundation for European Intellectual Mutual Aid"), an affiliate of the Congress for Cultural Freedom, created in 1966 to imbue 'non-conformist' Eastern European scientists with anti-totalitarian and capitalist ideas.
In 1993, the Open Society Institute was created in the United States to support the Soros foundations in Central and Eastern Europe and Russia.
In August 2010, it started using the name Open Society Foundations (OSF) to better reflect its role as a benefactor for civil society groups in countries around the world.