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3. George Kaiser

3. George Kaiser

Oil and gas, banking, investments

2004-08 Giving* $2,377 million

Kaiser’s focus remains on early intervention in the cycle of poverty. Giving through his Tulsa-based foundation provides services that include early childhood education, pre-natal health care, public health, in-home parenting, and secondary education, as well as more generalized safety net services that deal with the symptoms of poverty. More recent initiatives have focused on women's incarceration, secondary schools, and reserving land to create an arts and entertainment district in Tulsa. The biggest payout may be yet to come: Kaiser has said he plans to increase his gifts "until I die with one dollar left, assuming I can get the timing just right."

For more, visit the George Kaiser Family Foundation topic on Business Exchange.

*Based on public records and interviews with donors
Data: BusinessWeek, The Chronicle of Philanthropy and the Center on Philanthropy at Indiana University