X0306 4 2017-12-21 1 0001583744 Arc Logistics Partners LP ARCX 0001588893 Oswald Bradley K. 725 FIFTH AVENUE, 19TH FLOOR NEW YORK NY 10022 0 1 0 0 See Remarks Common units representing limited partner interests 2017-12-21 4 A 0 75000 0.00 A 111912 D Common units representing limited partner interests 2017-12-21 4 D 0 111912 D 0 D Represents vested phantom units subject to performance-based vesting that were awarded under the Issuer's Long-Term Incentive Plan. Includes an adjustment of 41 units that were previously not reflected as beneficially owned as a result of estimating the disposition for tax withholding purposes on account of the partial vesting of units attributable to a previously reported award of 2,095 phantom units. 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 and Lightfoot Capital Partners GP LLC, all of the common units and phantom units (each representing a contingent right to receive one common unit upon settlement) held by the Reporting Person were cancelled and converted into the right to receive an amount in cash equal to $16.50 per unit, subject to any required withholding taxes. Senior Vice President, Chief Financial Officer and Treasurer /s/ Stephen J. Pilatzke, Attorney-in-Fact for Bradley K. Oswald 2017-12-26