Carlos Slim Helú

Lifetime donations: $4 billion
Net worth: $27.3 billion
Generosity Index: 15%
One of the richest self-made billionaires in the world and the chairman of Grupo Carso, Carlos Slim Helú's primary philanthropic efforts occur through his Fundación Carlos Slim Helú.
The foundation has invested $100 million in the World Wildlife Fund toward efforts to conserve Mexico's natural environment, and in 2012, it gave $3 million to help provide internet to Latino families living in the US, in addition to many other donations to international organizations.
Slim Helú also serves as chairman of the Telmex Foundation, which strives to improve the quality of life in Mexico, his home country.
Source: Wealth-X