| http://www.w3.org/ns/prov#value | - The former Julian Robertson prot??g??e took out a 5.2% stake in his largest new holding SemGroup Corp. (SEMG) on Oct. 24, buying more than 2.1 million shares for a total cost of $82.6 million at $38 per share on average.SemGroup, an energy pipeline company based in Tulsa, Okla., that services clients in crude oil, natural gas and other industries, went public in November 2010 and its stock has sin
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