EXHIBIT 2.1 Execution Version AGREEMENT AND PLAN OF MERGER by and among WESTERN MIDSTREAM PARTNERS, LP, ARRAKIS OPCO MERGER SUB LLC, ARRAKIS HOLDINGS INC., ARRAKIS UNIT MERGER SUB LLC, ARRAKIS CASH MERGER SUB LLC, ARIS WATER SOLUTIONS, INC., and ARIS WATER HOLDINGS, LLC Dated as of August 6, 2025 ______________________________________________________________________________ ______________________________________________________________________________ TABLE OF CONTENTS ARTICLE I. THE MERGERS | Section 1.1 | ...