Warren Buffett, the chairman of Berkshire Hathaway Inc.

(NYSE:BRK), has reportedly chosen to delay his usual midyear donation to the Gates Foundation, the philanthropic organization founded by Microsoft Corporation (NASDAQ:MSFT) co-founder Bill Gates and his ex-wife, Melinda French Gates.

This marks the first time in twenty years that such a postponement has occurred, reported The Wall Street Journal on Monday.

Buffett's decision to hold off on the donation is pending the outcome of a review into the foundation's links with late sex offender Jeffrey Epstein.

The findings of this review, expected to be released later this summer, will inform Buffett's final decision, which could be announced in his annual Thanksgiving letter, as per the report.