Leon Cooperman, a Billionaire Charged With Insider Trading, Prepares to Fight By ALEXANDRA STEVENSON and MATTHEW GOLDSTEIN 6:19 AM ET The Securities and Exchange Commission said Mr. Cooperman used inside information to buy Atlas Pipeline Partners stock before an asset sale. http://www.nytimes.com/2016/09/22/business/dealbook/leon-cooperman-insider-trading.html?ref=business