X0306 4 2017-11-24 0 0001708301 BP Midstream Partners LP BPMP 0001719209 BP Pipelines (North America) Inc. 501 WESTLAKE PARK BOULEVARD HOUSTON TX 77079 1 0 1 0 0001719208 BP Midstream Partners Holdings LLC 501 WESTLAKE PARK BOULEVARD HOUSTON TX 77079 0 0 1 0 0001718832 BP Midstream Partners GP LLC 501 WESTLAKE PARK BOULEVARD HOUSTON TX 77079 0 0 1 0 Common Units representing limited partner interests 2017-11-24 4 J 0 1080642 A 4581177 I See Footnotes This Form 4 is being filed jointly by BP Pipelines (North America) Inc. ("BP Pipelines"), BP Midstream Partners Holdings LLC ("BP Holdco") and BP Midstream GP LLC (the "General Partner"). BP Holdco, a direct wholly owned subsidiary of BP Pipelines, owns all of the membership interests in the General Partner. Accordingly, the General Partner is an indirect wholly owned subsidiary of BP Pipelines. The General Partner owns the non-economic general partner interest in the Issuer. BP Holdco owns all of the membership interests in the General Partner. BP Pipelines owns all of the membership interests in BP Holdco. Accordingly, BP Pipelines may be deemed to indirectly own the securities of the Issuer directly held by the General Partner, but disclaims beneficial ownership except to the extent of its pecuniary interest therein. BP Pipelines may also be deemed to indirectly own the securities of the Issuer directly held by BP Holdco, but disclaims beneficial ownership except to the extent of its pecuniary interest therein. Pursuant to the Contribution, Assignment and Assumption Agreement dated as of October 30, 2017 by and among the Issuer, the General Partner, BP Holdco, BP Pipelines and The Standard Oil Company, and in connection and effective with the expiration of the underwriters' option to purchase additional common units on November 24, 2017, BP Holdco obtained 1,080,642 common units. /s/ Hans F. Boas, Chief Legal Counsel and Secretary, BP Midstream Partners GP LLC 2017-11-28 /s/ Susan Baur, Vice President, BP Midstream Partners Holdings LLC 2017-11-28 /s/ Susan Baur, Vice President, BP Pipelines (North America) Inc. 2017-11-28