Nov. 10 (UPI) -- Warren Buffett told Berkshire Hathaway shareholders, in a Thanksgiving letter Monday ahead of his retirement, that he plans to "step up" charitable giving from his $150 billion estate.

Buffett, 95, said he wants to accelerate the disbursement of his Berkshire stock to his children's foundations to ensure they can "dispose of what will essentially be my entire estate before alternate trustees replace them."

"My children are now at their prime in respect to experience and wisdom, but have yet to enter old age," Buffett said. "That 'honeymoon' period will not last forever."

While Buffett plans to continue writing his Thanksgiving letter every year, he told shareholders that he would no longer write Berkshire's annual report or take questions at its annual meeting.

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