Also on Thursday, Bezos said he will commit $2 billion to helping homeless families and starting pre-schools for low-income communities.
The second will operate a network of high-quality, full-scholarship Montessori-inspired preschools.
To raise awareness about childhood cancer, which is the second leading cause of death in the U.S. between kids aged 4 and 14, Amazon's Jeff Bezos wore pajamas to a meeting on Wednesday. Most important among those will be genuine, intense customer obsession.
Bezos owns the Washington Post, which, along with Amazon have been targets of Trump criticisms. He has not signed on to the Giving Pledge, and the Bezos Family Foundation is reportedly run by his parents; Bezos does not play an active role.
The Washington Posts top editor has said that Mr. Bezos has no involvement in its news coverage.
"The media", Bezos added, "is going to be fine". Amazon warehouse employees are known to have bad working conditions, pitiful wages, and have even been forced into homelessness after workplace injuries.
Another brought up the fact that Amazon strong-armed the Seattle city council to abandon the plan to tax the company in order to raise funds for tackling the mounting homelessness crisis.
As with most investment decisions by the Amazon founder, this one was likely grounded in data and science.
"We will build an organisation to directly operate these schools". Zuckerberg's shares in the social network are now valued at about US$61 billion.
He has also been criticized for not contributing his fortune to philanthropy like other billionaires have, including Microsoft founder Bill Gates and Berkshire Hathaway's Warren Buffett.
American billionaire philanthropy is spreading elsewhere.
The Amazon chief's wealth has become problematic for some. In 2016, it renovated a vacant hotel on land designated for its new headquarters so it could be used temporarily by the nonprofit group Mary's Place to give shelter to 200 homeless families. Amazon is designating 47,000 square feet of space at its new corporate office for a permanent Mary's Place shelter.