Exhibit 99.1 Murphy USA Inc. Reports First Quarter 2026 Results El Dorado, Arkansas, April 29, 2026 (BUSINESS WIRE) – Murphy USA Inc. (NYSE: MUSA), a leading marketer of retail motor fuel products and convenience merchandise, today announced financial results for the three months ended March 31, 2026. Key Highlights: "Murphy USA delivered first quarter results that showcase the strength of our low-cost high volume operating model," said President and CEO Mindy West. "As volatility was re-introduced to commo ...