X0303 4 2011-06-21 0 0001489136 SemGroup Corp SEMG 0000872786 BNP PARIBAS 787 SEVENTH AVENUE, 30TH FLOOR NEW YORK NY 10019 0 0 1 0 Class A Common Stock, par value $0.01 per share 2011-06-21 4 S 0 11081 26.7425 D 4336822 I By Subsidiary Class A Common Stock, par value $0.01 per share 2011-06-22 4 S 0 7041 26.6617 D 4329781 I By Subsidiary This Form 4 is being filed by BNP Paribas, a French societe anonyme and bank holding company under the Bank Holding Company Act of 1956, on behalf of its wholly owned subsidiaries. 4,336,822 shares of Class A Common Stock, par value $0.01 per share ("Common Stock") are directly held by BNP Paribas VPG SemGroup, LLC, a direct wholly owned subsidiary of BNP Paribas VPG Master, LLC, which is a direct wholly owned subsidiary of BNP Paribas. 4,329,781 shares of Common Stock are directly held by BNP Paribas VPG SemGroup, LLC, a direct wholly owned subsidiary of BNP Paribas VPG Master, LLC, which is a direct wholly owned subsidiary of BNP Paribas. /s/ Francois Haitaian, BNP Paribas Principal Investments 2011-06-23 /s/ Jean-Pierre Monnier, BNP Paribas Principal Investments 2011-06-23