Sulaiman bin Abdul Aziz Al Rajhi

Lifetime donations: $5.7 billion

Net worth: $590 million

Generosity Index: 966%

Back in 1957, Sulaiman bin Abdul Aziz Al Rajhi cofounded Al Rajhi Bank with his three brothers. It grew into one of the world's largest Islamic banks and earned Al Rajhi a 10-digit net worth.

But in 2013, he shifted his focus toward philanthropy and endowed his holdings in the bank to Sulaiman bin Abdul Aziz Al Rajhi Endowments Holding Company, which supports educational, religious, health, and social causes, including the Arab Institute for Arabic 

Language, National Guard Health Affairs, and the Sheikh Sulaiman bin Abdul Aziz Al Rajhi Mosque in Riyadh, Saudi Arabia.

Source: Wealth-X