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SemGroup Prices IPO

SemGroup Energy Partners LP, a Tulsa, Okla.-based , raised $275 million in its IPO. The company sold 12.5 million common units at $22 per unit ($19-$21 range), and ended its first day of trading up at $29.32 per unit. It is trading on the Nasdaq under ticker symbol SGLP, while Citi and Merrill Lynch served as co-led underwriters. Shareholders include Carlyle/Riverstone, which first invested in late 2004.