The new rich list is out, the one that lists the 400 richest Americans (see here).  Gates, Buffett and Ellison top the list, but the biggest movers this year were the Koch brothers, who are now tied for 4th richest Americans at $25 billion each.  The rest of the top 20 are combination of money managers (Soros, Paulson), Entrepreneurs (Bloomberg, Zuckerberg, Brin/Page, Bezos, Dell), and Heirs (4 Waltons and a Mars).

Were he still alive, Dan Duncan, founder of the largest MLP, Enterprise Products Partners ($EPD), would have probably made the top 20 at around $15 billion, but instead, his 4 most significant heirs made the list at $3.4 billion each.
Others who made the list this year that are affiliated or have been affiliated with MLPs include:

• Harold Hamm ($7.5 billion) – Chairman of defunct MLP Hiland Partners, now owns lots of acreage in the Bakken shale in North Dakota
• Rich Kinder ($6.4 billion) – MLP visionary and CEO of Kinder Morgan Energy Partners ($KMP), the second largest MLP
• Rod Lewis ($2.8 billion) – South Texas E&P guy, sold his midstream business to $EPD for mostly stock in 2006, now is single largest holder of EPD units, owns significant stake in Vanguard Natural Resources ($VNR) also as a result of asset sales
• George Lindemann ($2.1 billion) – CEO of Southern Union ($SUG), which is currently being fought over by Energy Transfer Equity ($ETE) and Williams ($WMB)
• Kelcy Warren ($2.0 billion) – CEO of $ETE
• Ray Davis ($1.4 billion) – co-founder with Kelcy Warren of what would become $ETE, now owns most of the Texas Rangers
• Joe Craft ($1.3 billion) – CEO of Alliance Resource Partners ($ARLP), coal mining MLP