Amazon.com Inc. founder Jeff Bezos, the world's richest man, and wife MacKenzie Bezos are divorcing after 25 years of marriage, the couple said in a joint statement on Twitter on Wednesday.

Bezos, 54, has a fortune that has soared to as high as $160 billion thanks to his stake in Amazon, which again became Wall Street's most valuable company this week, surpassing Microsoft Inc.

The couple decided to divorce after a long period of "loving exploration" and trial separation, and expect to continue as partners in joint ventures and projects, according to the statement.