EXHIBIT 99.1 Summit Midstream Corporation 910 Louisiana Street, Suite 4200 Houston, TX 77002 Summit Midstream Corporation Reports First Quarter 2025 Financial and Operating Results Houston, Texas (May 7, 2025) – Summit Midstream Corporation (NYSE: SMC) ("Summit", "SMC" or the "Company") announced today its financial and operating results for the three months ended March 31, 2025. Highlights Management Commentary Heath Deneke, President, Chief Executive Officer and Chairman, commented, "Summit's first quarte ...