X0306 4 2022-03-15 0 0001549922 Summit Midstream Partners, LP SMLP 0001237636 PETERS JERRY L C/O SUMMIT MIDSTREAM PARTNERS, LP 910 LOUISIANA STREET, SUITE 4200 HOUSTON TX 77002 1 0 0 1 See Remarks. Common Units (Limited Partner Interests) 2022-03-15 4 A 0 6444 0.00 A 27308 D The Reporting Person is a director of Summit Midstream GP, LLC, the general partner of the Issuer (the "General Partner"). The Issuer is managed by the directors and executive officers of the General Partner. /s/ James D. Johnston, Attorney-in-Fact for Jerry L. Peters 2022-03-17