X0306 4 2022-06-17 0001423902 Western Midstream Partners, LP WES 0001627376 Bourne Robert W. 9950 WOODLOCH FOREST DR. THE WOODLANDS TX 77380 1 SVP & Chief Commercial Officer Common units representing limited partner interests 2022-06-17 4 P 0 2500 22.90 A 34400 D Phantom Units Common units representing limited partner interests 12485 12485 D Phantom Units Common units representing limited partner interests 32035 32035 D 2020 Performance Unit - ROA 2023-02-12 2023-02-12 Common units representing limited partner interests 10924 10924 D 2020 Performance Unit - TUR 2023-02-12 2023-02-12 Common units representing limited partner interests 10924 10924 D 2021 Performance Unit - ROA 2024-02-18 2024-02-18 Common units representing limited partner interests 22040 22040 D 2021 Performance Unit - TUR 2024-02-18 2024-02-18 Common units representing limited partner interests 22040 22040 D 2022 Performance Unit - ROA 2025-02-12 2025-02-12 Common units representing limited partner interests 8671 8671 D 2022 Performance Unit - TUR 2025-02-12 2025-02-12 Common units representing limited partner interests 8671 8671 D Each Phantom Unit is the economic equivalent of one WES Common Unit representing limited partnership interests, and upon vesting, will entitle the holder to receive a common unit or, at the discretion of the Board of Directors of the General Partner, cash equal to the Fair Market Value of a Common Unit. These Phantom Units vest ratably over a three-year period on February 12th of each year, and will pay distribution equivalent rights in the form of WES Common Units on a current basis. These Phantom Units vest ratably over a three-year period on February 12th of each year, and will pay distribution equivalent rights in cash on a current basis. Each performance-based unit represents the right to receive, following vesting, between 0% and 200% of one WES Common Unit based upon the achievement of pre-established performance metrics over a 3-year performance period. /s/ Philip C. Neisel, as attorney-in-fact 2022-06-17