MacKenzie Bezos committed to giving away at least half of the $37 billion windfall she will receive in her upcoming divorce from founder Jeff Bezos, a move that ultimately could have implications for his voting power at the company.

She is one of the 19 new signatories to the Giving Pledge who’ve promised to donate more than 50% of their wealth to philanthropy or charitable causes, either during their lifetimes or in their wills, the organization said Tuesday. It was founded by Bill and Melinda Gates and Warren Buffett in 2010 and now has 204 participants from 23 countries.

“I have a disproportionate amount of money to share,” said MacKenzie Bezos, 49. “My approach to philanthropy will continue to be thoughtful. It will take time and effort and care. But I won’t wait. And I will keep at it until the safe is empty.”

Other new signatories include hedge-fund titan Paul Tudor Jones, venture capitalist Chris Sacca and WhatsApp co-founder Brian Acton. David Harding, the British billionaire who founded Winton Capital, also signed.

Fulfilling the requirements of the pledge can be tricky in a world where the wealthiest are accruing more riches than ever. Since 2010, Buffett has given away Berkshire Hathaway shares worth more than $30 billion at the time of the donations. Still, his wealth is about 85% greater than at the time of his 2010 letter, thanks to Berkshire’s rising stock price.

Jeff Bezos, the world’s richest person, hasn’t signed the pledge and was criticized for his relatively restrained philanthropic efforts to date. In 2017, he tweeted for recommendations about how he can best use his wealth to help people “right now,” before announcing a $2 billion commitment to support homelessness and education initiatives in September 2018.


He took to Twitter again Tuesday to praise his former spouse’s decision. “MacKenzie is going to be amazing and thoughtful and effective at philanthropy, and I’m proud of her. Her letter is so beautiful. Go get ’em MacKenzie.”

The pair announced they were divorcing in January. As part of the split, MacKenzie Bezos will receive a 4% stake in Amazon. Jeff Bezos will keep 12% as well as some other assets, including The Washington Post and space-exploration company Blue Origin.

Under the former couple’s agreement, Jeff Bezos retains sole voting authority over MacKenzie Bezos’ Amazon shares, meaning that even though his ownership stake is diminished, his voting power remains intact. But if MacKenzie Bezos sells her shares in the open market or donates them to a nonprofit organization that intends to sell them in the open market, the voting agreement no longer applies. The agreement also stipulates that if MacKenzie Bezos transfers her Amazon shares by any other means, she will first require the recipient to give Jeff Bezos right to vote the shares.


Seattle Times reporter Benjamin Romano and Bloomberg’s Zoya Khan contributed to this report.