Glencore Plc’s initial public offering minted six billionaires in 2011, when Ivan Glasenberg and five other executives together controlled stakes worth $24 billion. Today, only three remain in the elite club -- based on the value of their holdings in the company -- and two of those are on the brink of losing their status after the shares of the leading commodity trader lost 70 percent since the flotation. The May 2011 offering generated more wealth than the IPOs of some of Wall Street’s most prominent firms, including Goldman Sachs Group Inc. in 1999. Since then, Glencore’s share price has fallen every year, a ... (full story)