08:27 AM EDT, 09/29/2025 (MT Newswires) -- Western Midstream Partners ( WES ) and Aris Water Solutions ( ARIS ) said Monday that the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 has expired, which was a key condition for their merger to close.

In August, Western Midstream ( WES ) had signed a definitive agreement to acquire Aris in an equity-and-cash transaction valued at about $1.5 billion.