Jack Ma is now $2 billion poorer than he was last month. He's down to his last $23 billion. Rich company founders and shareholders benefited from the market's rally to record highs in September, but its free fall this week has shaved billions from …

On a recent weekday, that quest took the California billionaire to a heavily industrial corner of southwest Detroit whose residents figure prominently in his campaign to disrupt American politics by making climate change a wedge issue in campaigns.

Owners: Charles Johnson, retired chairman of mutual fund Franklin Resources and No. 59 on Forbes' 2013 list of U.S. billionaires. Johnson owns the San Francisco Giants. Net worth: $5.6 billion, according to Forbes. Property: 19,941 sq-ft home with 6 …

We write about billionaires and their philanthropy almost every day here at IP, and so we've been intrigued by Darrell West's new book, Billionaires: Reflections on the Upper Crust. West, who holds a top job at the Brookings Institution, has written a …

These five modern-day Tony Starks don't really accept the word 'no'. Their stubbornness combined with their equally enormous wealth and intelligence give them the unique ability of being able to imagine something and then watch it become a reality.

In a billionaire move that nearly out-Bransons Richard Branson, Mark Zuckerberg just bought part of Hawaii. Yeah, he just bought part of a state. The Facebook founder dropped $100 million on two adjacent chunks of land on Kauai's north shore.

LAS VEGAS – Speaking at a labor union convention here today, Sen. Bernie Sanders (I-Vt.) said the future of American democracy is at stake. “We are not living in a democracy when 60 percent of Americans are not voting, while billionaires like the Koch …

I finally read some good news. It turns out there are 155 more billionaires in the world. That's cause for celebration. Why? Joe PIsani. Because ever since I got my first paycheck from Iannucci & Son Mason Contractors, back when the minimum wage was $1 …

The billionaires Charles and David Koch and other wealthy individuals are pumping hundreds of millions of dollars into this fall's campaigns by taking advantage of a disastrous 2010 Supreme Court ruling and subsequent court decisions that gutted …