Former Mrs MacKenzie Bezos has promised to donate half the fortune to charity.
The couple got married in 1993 and have four children while she has an 18-year-old son from a previous relationship.
Under the agreement, MacKenzie Bezos, 49, will receive approximately 19.7 million Amazon.com shares, giving her a four percent stake in the company valued at $38.3 billion while Jeff Bezos, 55, will retain a 12 percent stake and remain the world’s richest man.