X0306 4 2019-12-16 0 0001619739 Hess Midstream Partners LP HESM 0001087997 HESS JOHN B 1501 MCKINNEY STREET HOUSTON TX 77010 1 1 0 0 Chairman of the Board & CEO Common Units 2019-12-16 4 D 0 32625 D 0 D Common Units 2019-12-16 4 D 0 130425 D 0 I See Note Common Units 2019-12-16 4 D 0 43500 D 0 I See Note Pursuant to the Agreement and Plan of Merger dated October 3, 2019 (the "Merger Agreement"), each Common Unit of Hess Midstream Partners LP ("Old HESM") issued and outstanding prior to the effective time of the transactions contemplated by the Merger Agreement (the "Effective Time") (other than any Old HESM Common Units held by the Existing Sponsors or the HIP Entities (as defined in the Merger Agreement) as of immediately prior to the Effective Time), was automatically converted into the right to receive one validly issued, fully paid and non-assessable Class A Share of Hess Midstream LP ("New HESM"). The reporting person disclaims beneficial ownership over these common units except to the extent of his pecuniary interest therein. Held by a charitable lead annuity trust established under the will of Leon Hess. The reporting person is one of five trustees of the trust. Held by a family limited liability company controlled by the reporting person. Barry Schachter for John B. Hess 2019-12-17