NetJets

This weekend marks the Berkshire Hathaway annual meeting, often called "Woodstock for Capitalists." But what do the tens of thousands of investors making the pilgrimage to Omaha, Neb., get for their trouble?

Asset sharing has become a popular theme on Wall Street. There was no shortage of demand when HomeAway and Zipcar went public, and a second-wave of companies, led by airbnb, is currently attracting considerable interest from venture capital firms. Plus, private airplane firm NetJets is owned by a certain oracular billionaire's holding company.

David Sokol, widely viewed as the heir apparent to famed investor Warren Buffett, abruptly resigned Wednesday. What investors want to know now is who's still in the running to succeed Buffett as CEO. Here are four possibilities.

NetJets, a private aviation company selling fractional ownership in its planes, announced Thursday that it would buy Marquis Jet, a private jet cards company that sells the use of NetJets's planes in 25-hour blocks. Marquis Jet becomes a subsidiary of NetJets, itself owned by Warren Buffett's Berkshire Hathaway.

Warren Buffett turns 80 on Monday, an age at which most people have been retired for a decade. This seems as good a time as any to take stock of a remarkable life in business.

Berkshire Hathaway delivered 20% gains for shareholders, despite a few key missteps. The results were good enough for billionaire CEO Warren Buffett to express optimism about the future in his widely read annual letter to investors.

Electronic Arts (ERTS) is proving to Tiger Woods that a friend who can make a buck off your name in a time of crisis is a friend indeed. The no. 2 video-game company doesn't seem to care about the beleaguered golfer's 14 (alleged) mistresses, his bizarre Thanksgiving car accident, or his beefcakey...

The general aviation industry, which is made up of private and corporate jet manufacturers, is in an awful fix. The latest? Plane-leasing outfit NetJets just announced it is laying off 5 percent of its staff, or 350 employees, due to "severe economic conditions facing the aviation industry,"...