(CNBC) -- T. Boone Pickens, the wildcatter “Oracle of Oil,” hedge fund founder and philanthropist who rewrote the playbook for corporate raiders, has died. He was 91.
He died Wednesday of natural causes.
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Pickens had been in declining health, suffering from a series of strokes and a serious fall in 2017. In late 2017, he put his sprawling 100-square-mile Mesa Vista Ranch in the Texas Panhandle on the market for $250 million, and a few months later, he closed his energy hedge fund, BP Capital, to outside investors.