Exhibit 99.1 April 23, 2025 Phoenix, Arizona Knight-Swift Transportation Holdings Inc. Reports First Quarter 2025 Revenue and Earnings Knight-Swift Transportation Holdings Inc. (NYSE: KNX) ("Knight-Swift" or the "Company"), one of the largest and most diversified freight transportation companies, operating the largest full truckload fleet in North America, today reported first quarter 2025 net income attributable to Knight-Swift of $30.6 million and Adjusted Net Income Attributable to Knight-Swift of$45.4 ...