If the couple split their fortune equally, it could leave MacKenzie, 48, with $69 billion, making her the world's richest woman.
"As our family and close friends know, after a long period of loving exploration and trial separation, we have chose to divorce and continue our shared lives as friends", they wrote. (See their full statement below.) They have yet to file any official paperwork with the courts, confirming expectations that they will seek to handle the matter privately so as to avoid attracting unwanted attention to the company.
Asked by a reporter on the White House lawn about Bezos' pending divorce, Trump ― himself no stranger to marital breakups ― said: "Well, I wish him luck". To which the president replied: "I wish him luck".
"I don't think recent developments have changed anything", said Thomas Forte, an analyst at DA Davidson, pointing to Bezos' influence over Amazon. "It's going to be a beauty".
It is unclear how much of an Amazon corporate matter the split could become, especially for a company that recently became the world's most valuable as measured by stock price.
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No information is available on how the couple are dealing with the financial implication of the divorce.
The Amazon chief's estimated net worth is reproted to be about 137 billion dollars.
Theoretically, MacKenzie Bezos could use her half of the 16 percent Amazon stake - which she appears to be entitled to under Washington state law - to wage a noisy shareholder battle against her soon-to-be ex-husband, as well as the company's board. The Bezos have four children.
The divorce between Bezos and wife, MacKenzie, may be more complicated than originally expected.
LOS ANGELES, CA - DECEMBER 03: WME's Patrick Whitesell, Lauren Sanchez and Amazon CEO Jeff Bezos attend Jeff Bezos and Matt Damon's "Manchester By The Sea" Holiday Party on December 3, 2016 in Los Angeles, California.
In September, the Bezoses launched the Day One Fund, whose initial $2 billion endowment was earmarked to help fund homeless relief programs and early childhood education. Virtually all of that is tied up in the almost 79 million shares of Amazon stock that he owns. Bezos also owns a $25 million home in Beverly Hills and three linked apartments in NYC worth $17 million.