X0306 4 2017-12-21 1 0001583744 Arc Logistics Partners LP ARCX 0001588833 Lightfoot Capital Partners, LP 725 FIFTH AVENUE, 19TH FLOOR NEW YORK NY 10022 0 0 1 0 0001590718 Lightfoot Capital Partners GP LLC 725 FIFTH AVENUE, 19TH FLOOR NEW YORK NY 10022 0 0 1 0 Common units representing limited partner interests 2017-12-21 4 D 0 5242775 D 0 D Pursuant to the Purchase Agreement and Plan of Merger dated as of August 29, 2017, by and among Zenith Energy U.S., L.P., Zenith Energy U.S. GP, LLC, Zenith Energy U.S. Logistics Holdings, LLC, Zenith Energy U.S. Logistics, LLC, Arc Logistics Partners LP, Arc Logistic GP LLC, Lightfoot Capital Partners, LP ("LCP LP") and Lightfoot Capital Partners GP LLC ("LCP GP"), all of the common units held by LCP LP were cancelled and converted into the right to receive an amount in cash equal to $14.50 per common unit, subject to any required withholding taxes. This Form 4 is filed jointly by LCP LP and LCP GP, the general partner of LCP LP. These units were owned directly by LCP LP, a ten percent owner of the Issuer, and indirectly by LCP GP as general partner of LCP LP. LCP GP was a ten percent indirect beneficial owner of the Issuer by virtue of its general partner interest in LCP LP. LCP GP disclaimed beneficial ownership of the units owned directly by LCP LP except to the extent of its pecuniary interest therein. /s/ Steven C. Schnitzer, as Senior Vice President, General Counsel and Secretary of Lightfoot Capital Partners GP LLC, the general partner of Lightfoot Capital Partners, LP 2017-12-26 /s/ Steven C. Schnitzer, as Senior Vice President, General Counsel and Secretary of Lightfoot Capital Partners GP LLC 2017-12-26