Exhibit 99.1 ew April 29, 2025 Analyst Contact: Megan Patterson Media Contact: 918-561-5325 Brad Borror 918-588-7582 ONEOK Announces Higher First Quarter 2025 Earnings; Affirms 2025 Financial Guidance Higher Year-Over-Year Rocky Mountain Region Volumes TULSA, Okla. - April 29, 2025 - ONEOK, Inc. (NYSE: OKE) today announced higher first quarter 2025 results and affirmed full-year 2025 financial guidance. Higher First Quarter 2025 Results, Compared With First Quarter 2024: "ONEOK's solid first quarter results ...